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HomeMy WebLinkAboutSpec Ex/Site/Conservation Plan TOWN OF SOUTH WINDSOR INLAND WETLANDS, WATERCOURSES AND CONSERVATION APPLICIVED Application # 0�-�55P _Date Received 11 NOV - 4 2003 Jouth Windsor INSTRUCTIONS INLAND WETLANDS AGENCY CONSERVATION COMMISSION 1. Fifteen applications (15) with map and plans (2 copies) shall be submitted together with the fee set forth in the Inland Wetlands, Watercourses and Conservation Regulations, Town of South Windsor. (See Regulations, Section VII - X) 2. The South Windsor Inland Wetlands, Watercourses and Conservation Regulations should be reviewed with respect to the standards and criteria for application Evaluation. (See Regulations, Sections VII-X) 3. The applicant understands that this application is to be considered complete only when all information and documents required by the Agency have been submitted. The applicant shall also complete the state filing form. A. Applicant's Name: The South Windsor Housing Authority;and The Metro Realty Group,LTD,do Geoffrey Sager,President Address: 1540 Sullivan Ave, South Windsor, CT 06074; 6 Executive Dr, Farmington, CT 06032 Phone: (home) (work) 644-3082; 674-5641 (fax) 677-6919 (Metro) B. Legal owner's name: Fred S. Katten; Calvary Church of the Assemblies of God Address 115 Beverly Rd,W.Hartford, CT 06119; 400 Buckland Rd, South Windsor, CT 06074 Katten Calvary Church Phone (home) 232-7790 (work) 644-1102 (fax) (List additional owners, addresses, and phone numbers on back of application) C. If the applicant is not the owner of the subject property; a letter by the owner(s) authorizing the proposed regulated activity set forth in the application must accompany this form and will be part of the application. D. Project Name (if any) Berry Patch II 1. Contact Person (if further information is needed) Peter R. DeMallie, Design Professionals, Inc. (work) 291-8755 (fax) 291-8757 E. The geographical location of the property which is to be affected by the proposed regulated activities including a description of the land in sufficient detail to allow identification of the property on the Inland Wetland and Watercourse Map. 7 Assessor's map # 51, 38 Parcel # 32, 2 Zone AA-30 & GD& FP F. Names of all abutting property owners from records in Town Clerk's office. (use separate sheet if necessary) See attached sheet G. Have you notified all abutting property owners (from records in Town Clerk's office) by certified letter that an application is pending before the Agency? Yes ❑ ** (you are required to supply a copy of the letter with the list of the names of the abutters).** see attached she t H. Purpose and description of all proposed regulated activity(s) including amount of disturbance in square feet and types of fill and the time element involved: Time element: 2-3± years; Only proposed wetlands activity is a temporary disturbance for 97+ l f of sanitary sewer (1,485 s f or 0.03 ac ) Propose 2 31+ ac upland review disturbance for filling, excavation, streets, buildings landscaping, utilities, parking, sidewalks, E & S, water quality and related improvements. I. A class A-2 map of the property drawn to 1" = 40', showing the area to be developed, extent of the wetlands and watercourses affected, topography, existing and proposed activities and names and locations of adjacent property owners must be submitted. J. Amount of regulated area disturbance and types of fill (including wetlands and regulated buffers). 0.03± acre wetlands (temporary disturbance) and 2.31± ac. upland review area disturbance (see above for types of fill) . K. Acreage of wetlands and watercourses in regulated areas to be altered: 0 03+ acre (temporary disturbance) L. Acreage of wetlands and watercourses to be created: To be determined M. Lineal feet of proposed stream alteration: 0 N. Total land area of project and percentage which is wetlands: _ 33,40± acres total land area (Berry Patch & Berry Patch II combined) ; 23.9% wetlands (6.39 ac. for Berry Patch II and 1.59 ac. for Berry Patch) O. Identify all other permits or approvals that have been issued, applied for, or required with respect to the proposed activity set forth in this application. (These may include but not be limited to, local Planning & Zoning, Zoning Board of Appeals, D.E.P., F.E.M.A., D.O.T., The Army Corps of Engineers, and any other State, Local or Federal Permits.) PZG DEP, WPCA, DOT (pending) 8 ' P. The applicant (or designated representative) hereby attests that a sign will be posted at the following location(s) Buckland Road, Deming Street & Oakland Road By Design Professionals, Inc. Name Peter R. DeMallie on or before the following date as directed by Town Staff Signature: These signs must be displayed continuously for at least ten (10) days prior to scheduled meeting (see Regulations, Section 7.3a) The undersigned hereby applies for the regulated activities listed in paragraph H above, for a Inland Wetlands, Watercourses and Conservation permit for the property described herein and confirms that: 1. She/he is familiar with the currently effective Inland Wetlands, Watercourses and Conservation Regulations of the Town of South Windsor. 2. She/he understands that at any time during the review period, the Agency may require the applicant to provide more information about the wetlands and/or watercourses in question and/or any proposed activity. 3. All information submitted in the application for review shall be considered factual, or in the case of anticipated activity, binding. A knowing failure of the applicant or any of her/his agents to provide correct information, or performance exceeding the levels of activity anticipated, shall be sufficient grounds for revocation of any permit under these regulations. 4. By making this application, the applicant gives permission to the Inland Wetlands, Watercourses and Conservation Commission members and/or its representative to enter the portions of the premises which are subject of the application for the purpose of inspection and investigation and otherwise evaluating the merits of the application both fore and after a final decision has been issued. �. Signature of Owner of P perty �/���� Date _T t i n ure of App is Date Tr 9 RECEIVED CO'NNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTEMON4 2003 Statewide Inland Wetlands & Watercourses Activity Reporting Form 00uth Windsor INLAND WETLANDS AGENCY CONSE]taken ssION In accordance with the requirements of Section 22a-39-14 of the Regulations of Connecticut State Agencies,this form is to be completed for each a by an inland wetlands agency established pursuant to Section 22a-42 of the Connecticut General Statutes. Use a separate form to report each acby the agency. It is recommended that this form be made part of the application package. Inland wetlands agencies are responsible for verifyin information proyided below is accurate and that it reflects the final action of the agency. 1. TOWN IN WHICH THE ACTION IS OCCURRING: South Windsor Does this project cross municipal boundaries? Yes No X If so,please list the other towns in which the action is occurring: 2. LOCATION: USGS Quad Map name: Manchester AND Number: 41072—G5—TF-024 Attach a clean 8 '/z "x I1"original scale photocopy of the USGS Quad Map with,in red ink, the boundary of the project site outlined(where possible)or the project site pinpointed with an arrow. Do not circle the"general vicinity"of the site_ In the lower right-hand corner of each USGS Quad Map there is an identifying name,write the name from the corresponding map in the space provided above. Quad numbers are found on the Connecticut Town and Quadrangle Index Map (the directory to all USGS Quad Maps). Please provide the number in the space provided above_ Do not attach a copy of the National Wetlands Inventory Map. Do Not attach a copy of the Connecticut Town and Quadrangle Index Map. 3. NAME OF APPLICANT,VIOLATOR OR PETITIONER: The Metro Realty Group, LTD & South Windsor Housing Authority Supply the name of the person applying for a permit,petitioner for a map amendment or jurisdictional ruling,or recipient of the enforcement action. 4. NAME FOR PROJECT SITE: Berry Patch II Elderly Apartments Supply the name given to the project,or the name by which the project site is generally known- Briefly describe the project: 96—unit elderly apartments 5. ACTIVITY TYPE CODE: 1 2 9 12 Provide the code or codes which best characterize the activity being reported. A maximum of 4 codes may be entered_ For example, locating a driveway in a buffer/upland review area would be code "9"and code"12"(code "7"is not used). The construction of a house in the buffer/upland review area would most likely be codes "2"for excavation,"9"for driveway construction,and"12"for buffer/upland review area. Construction of a parking lot in a buffer/upland review area may be codes"1", "7","10%and "12". 1 ...Filling 7 .... Culverting(not for roadways) 2 . .. Excavation 8 .... Underground Utilities (no other activities) 3 ...Land Clearing/Grubbing(no other activity) 9 .... Roadway/Driveway Construction 4 ... Stream Channelization 1.0 -.. Drainage Improvements 5 .. . Stream Stabilization I 1 ... Pond Dredging/Dam Construction 6 .. . Stream Clearance (removal of debris only) 12 . .. Activity in Buffer/Upland Review Area 6. ACTIVITY PURPOSE CODE: C Enter only one code letter which best characterizes the activity. ALL STATE AGENCY PROJECTS MUST ONLY CODE"N".' A .. . Residential Improvement by Homeowner I .. . Storm Water/Flood Control B . .. New Residential Development for Single Family Units J ... Erosion/Sedimentation Control C . . . New Residential Development for Multi-Family/Condos K... Recreation/Boating/Navigation D . .. Commercial/Industrial Uses L . . . Routine Maintenance E ... btunicipal Project M .. Map Amendment F . . . Utility Company Project •N... State Agency Project G .. .Agriculture,Forestry or Conservation P .. . Other H .. . Wetland Restoration,Enhancement, Creation REVISED 1198 7. AREA OF WETLANDS AND/OR WATERCOURSES ALTERED: %iclude areas that are altered or are proposed to be altered,temporary or permanent,for all agency permits,denials,amendments, and enforcement actions. Remember,these figures represent only the acreage altered,not the total acreage of wetlands or watercourses-on the site. Figures should be provided by the applicant in the application. Provide all information in acreage including those areas less than one acre. To convert from square feet to acres,divide square feet by the number 43.560_ Enter a zero if there is no alteration. Open water body altered refers to lakes,ponds or similar bodies of water that are filled or dredged. Stream alterations are to be reported in linear feet and include the total length of the river,brook,stream or other watercourse directly altered as a result of the action taken by the agency. Include any culverting(roadway,etc.),channel improvements,rip rap installation,relocation or dredging. A. Wetland Area Altered: 0.03± ACRES B. Open Water Body Area Altered: 0 ACRES C. Stream Alteration: 0 LINEAR FEET 8. BUFFER/UPLAND REVIEW AREA ALTERED: 2.31± ACRES Buffer or upland review areas are those areas adjacent to wetlands or watercourses where activities are regulated by the local agency. Report the acreage of upland review areas that are altered or are proposed to be altered,temporary or permanent,for all agency permits,denials,amendments,and enforcement actions;or for agent approval pursuant to 22a-42a(c)(2). For example,a 2 acre project site may have an activity occurring in I acre of buffer/upland review area and 0.25 acres of wetlands. Therefore,0.25 acres will be reported on line 7A and I acre on line 8. 9. AREA OF WETLANDS AND/OR WATERCOURSES RESTORED, ENHANCED OR CREATED: 0 ACRES Mitigation measures may be considered as a condition of issuing a permit for an activity. Report areas that are,or are proposed to be,restored,enhanced or created for all agency permits,denials,amendments,and enforcement actions. Restored or enhanced applies to previously existing wetlands or watercourses. For example,a wetland area filled two years ago is proposed to be restored by removing the existing fill. Created applies to an upland area which is converted into wetlands or watercourses. FOR MUNICIPAL AGENCY USE ONLY FOR STATE USE ONLY THE INLAND WETLANDS AGENCY MUST ENSURE THAT THE INFORMATION DATE RECEIVED: PROVIDED BELOW IS ACCURATE AND THAT IT REFLECTS THE FINAL ACTION OF THE AGENCY. COMPLETED FORMS FOR ACTIONS TAKEN 1 I DURING A CALENDAR MONTH SHALL BE MAILED BY THE AGENCY TO THE DEP NO LATER THAN THE 15TH DAY OF THE FOLLOWING MONTH. MAIL REPORTING FORMS TO: Inland Water Resources Division,DEP, 79 Elm Street,Hartford, CT. 06106 QUESTIONS MAY BE DIRECTED TO THE WETLANDS MANAGEMENT GIS CODE#: SECTION AT(860) 424-30 1 9. ........................................ NAME/TITLE OF PERSON COMPLETING THIS FORM: FILE# (SAME As ouno #): (PRINT) (SIGNATURE) FORM COMPLETED: YES NO DATE ACTION WAS TAKEN: MONTH YEAR WAS A PUBLIC HEARING HELD? Yes No IF "NO". DATE MAILED TO TOWN: ACTION TAKEN: ENTER LrrrrR DATE RETURNED TO DEP: A. PERMIT GRANTED BY AGENCY B. PERMIT DENIED BY AGENCY C. PERMIT EXrtNDED/AMENDED BY AGENCY D. AGENT APPROVAL PURSUANT TO 22a-42a(c)(2) E. APPEAL OF AGENT APPROVAL PURSUANT TO 22a-42a(c)(2) F. MAP AMENDMENT(AMENDMENT TO THE OFFICIAL TOWN WETLANDS MAP, NOT A PROJECT SITE MAP) G. ENFORCEMENT NOTICE/ORDER , H. JURISDICTIONAL RULING (I.E.: ACTIVITIES "PERMITTED As OF RIGHT" OR ACTIVITIES CONSIDERED NON-REGULATED) REVISED 1198 r �� ��. :i i; �.�'`. ,o > �'.9J ��1 S�-r � �� /��r��_�j��i/ \Z� r"� l •� �3^a�`� � _ r. qo / r 10 n •'y / ���-- .� � � / 4 Is • 111 i �:� � ' I•: . . �/ ,f�,_:,;, 1, �� _ fir, � ) �\ Jt. gb Q : ) •. <,o .p ,- i i`O,a'�,` > - - �.-`\� _ - i � Lam..: � ," 3 (, /i ' 1 - .. r[ y�,_� JJlrrl`0'j.\\, f 7 ///o���� `�,��� �.-. ^�..,-.` ~` !/( I tL�` t/I �i.;.. ( .y/vl.i �JiIN �^• �� 00/° C �.J �,. oo \ter '��J •�J o ___� \\\iYYSSS'Y��� \\— /// o ° 1ODi Rio: l g . \�\� ( `mot•Ini � I iJ �. 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L��,•. �:$!1 ��\:ll�I!" � Il r: DESIGN PROFESSIONALS, INC. civil engineers ♦ planners ♦ surveyors RECEIVED gis ♦ gps ♦ landscape architects NOV - 4 2003 Transmitted via certified mail South Windsor INLAND WETLANDS November 4, 2003 CONSERVATION COMMISSION Dear Current Abutting Property Owner Re: Berry Farm H(Elderly Housing) Oakland Road(Route 30), Felt Road and Buckland Road South Windsor, Connecticut DPI Project No. 03-1823 In accordance with regulations of the Inland Wetlands Agency and the Planning&Zoning Commission, we are required to notify you that an application has been filed on the property abutting yours and is subject to a hearing(s)by the Inland Wetlands Agency and Planning& Zoning Commission. The applications and plans are on file with the South Windsor Planning Department in the Town Hall. As an abutting property owner you are invited to the hearing(s)to ask questions and/or give comments, however, you are not required to attend. You may also submit written comments regarding the application(s)prior to the meeting if you so desire. For further information regarding the specific date this application will be heard, please contact Kelli Koehler, Administrative Secretary, Michele Lipe, Deputy Planning Director, or Jeffrey Folger, Environmental Planner, at the South Windsor Planning Department at 644-2511, ext. 253, 252 or 229, respectively. Thank you. Sincerely, DESIGN PROFESSIO NALS, INC. By:A�v /<'Q Peter R. DeMallie Principal cc: Jeffrey Folger Marcia Banach Geoffrey Sager 165 South Satellite Road,South Windsor,Connecticut 06074 Tel: (860)291-8755•Fax: (860)291-8757 Email:dpicivil@aol.com Direct Abutting Property Owners RECEIVED Berry Patch II Oakland Road (Route 30), Felt Road&Buckland Road NOV - 4 2003 South Windsor, Connecticut south winasor DPI Project No. 03-1823 INLAND CO SER WETLAND AGENCY MU/Lot Abutting Property Owner(s) Mailing Address 38/2 Calvary Church of the Assemblies of God 400 Buckland Road South Windsor, CT 06074 39/53 Robert N. & Amy L. (Surv) Gamache 25 Grandview Terrace South Windsor, CT 06074 39/54 Karen A. &Edward J. O'Connor 35 Grandview Terrace South Windsor, CT 06074 39/55 Robert&Penelope P. (Surv)Torrani 39 Grandview Terrace South Windsor, CT 06074 39/64 Michael J. &Kristina G. Suppicich 65 Summit Drive South Windsor, CT 06074 51/11 Dennis C. & Sharon E. Platt 97 Box Mountain Drive Vernon, CT 06066 51/12 Richard S. Kelley 1744 Ellington Road South Windsor, CT 06074 51/13 Harold L. Dodd 512 Buckland Road South Windsor, CT 06074 51/25 Melvin D. Stein 69 Oakland Road South Windsor, CT 06074 51/26 Marian& Teresa(SU)Malyszczycki 101 Oakland Road South Windsor, CT 06074 51/33 The Village at Buckland Court 432 Buckland Road South Windsor, CT 06074 52/91 Lois H. Petersen 440 Deming St. South Windsor, CT 06074 52/93 Pauline G. Johnson 195 Oakland Road, Box 453 South Windsor, CT 06074 52/94 Mildred S. Lu&Kenneth Simler 151 Oakland Road South Windsor, CT 06074 Stormwater Management Plan Berry Patch II South Windsor, Connecticut RECEIVED NOV - 4 2003 South Windsor INLAND WETLANDS AGENCY CONSERVATION COMMISSION �rw�w o01O Go-pi IyR -T CO e @ 0 Z�. C. t7 ONAL ' . y' �I BBBB6I. L7 � 50 OO Prepared by Design Professionals, Inc. 165 South Satellite Road South Windsor, CT 06074 DPI Project No. 03-1823 November 4, 2003 Table of Contents: Page# Introduction 1 Proposed Development 1 Off-Site Analysis 1 Peak Runoff control 2 Nonstructural Drainage System 2 Riparian Buffers 2 Erosion/Sedimentation Control Systems 2 Storm-water Runoff Quality 2 Conveyance System 2 Discharge at the Natural Location 2 Maintenance and Operation 2 Topographic Contour Maps 3 Floodplain Boundaries 3 Drainage Design 3 Water Quality 5 On-Site Storm Sewer Calculations 5 Conclusions 5 Appendices Site Location Map A TR-55 Existing Conditions- Calvary Site B TR-55 Existing Conditions—Katten Site C TR-55 Developed Conditions Calvary Site D TR-55 Developed Conditions Katten Site E Detention/Infiltration Basin Design F Detention/Infiltration Basin Routings G Storm Sewer Calculations-Calvary Site H Storm Sewer Calculations-Katten Site I 14 Introduction: The proposed Berry Patch II consists of two sites that are adjacent to the original Berry Patch site located on the south side of Oakland Road in South Windsor, Connecticut. One site is located to the northwest of the existing Berry Patch site and is known as the Katten site. The Katten site consists of 14.15 acres of land and extends from the northeast side of the Berry Patch site out to Buckland Road. The Katten site is bordered by a mixture of residential and commercial uses, and by the assisted living elderly housing. The site is presently being utilized for agricultural purposes as a pasture for cows. The Katten site is traversed by Farm Brook, and has substantial wetland and floodplain areas associated with Farm Brook. The second site is located to the southwest of the existing Berry Patch site and is known as the Calvary site. This site consists of 5.28 acres of land that will be divided off from the existing Calvary Church site. The Calvary church site is bordered by residential to the east,the Calvary Church to the west, open land of the Calvary Church to the south, and the Berry Patch and assisted living elderly housing to the north. Appendix A contains a site location map. Proposed Development: The proposed development of the site includes the construction of 96 elderly housing units contained within 5 buildings. Two of the buildings will be located on the Calvary Church site, and three buildings on the Katten site. As part of the development, access roadways,parking, and driveways will be constructed. Both sections will be serviced by public sanitary sewer and water. The Storm drainage system proposed for the development includes the installation of storm-sewers within the proposed access streets, vegetated drainage swales, and a piped storm drainage system. The drainage discharge from the development of the Calvary Church site will be to a detention/infiltration basin. The discharge from the Katten site will be to Farm brook. The intent of the design is to provide sufficient detention/infiltration on the Calvary church site to mitigate the peak stormwater discharges from the development of both sites. Off-Site Analysis: The large majority of the Calvary Church site presently drains to the northwest to a Swale that runs along the eastern side of the Calvary church and then along the northern property boundary to the west to Buckland Road. The storm sewers within Buckland Road discharge to Farm Brook. A small corner of the Calvary Church site drains to the northeast to the Berry Patch site. The Katten site drains directly to Farm Brook via overland flow. Farm Brook traverses the site from east to west, and discharges from the site under Buckland Road. In this same vicinity, the storm drainage from Buckland Road is discharged into the Farm Brook. Peak Runoff Control: The intent of the design is to provide sufficient detention/infiltration on the Calvary church site to mitigate the peak stormwater discharges from the development of both the Calvary Church and Katten sites. Nonstructural Drainage Systems: -The site will make use of a number of nonstructural measures to help control the runoff on the site, and help treat the runoff. The most important measures are the Infiltration/Detention basin, and the water quality swales that will collect the runoff from the piped drainage system, and help treat the runoff prior to discharge. .Riparian Buffers: Buffer areas will be maintained between the Farm Brook and existing developed areas and the proposed development. Erosion/Sedimentation Control Systems: An extensive erosion/sedimentation control plan has been developed as part of the site design. These measures include the following: 1. Installation of silt fence down-slope of disturbed areas. 2. Installation of silt fence around stockpiled materials. 3. Installation of silt fence around catch basins. 4. Use of temporary sediment basins during construction. 5. Seeding and mulching disturbed areas as soon as practical during construction. 6. Limiting the areas of disturbance during construction. 7. Installation of construction entrance pads and sweeping of roadways as needed. 8. Maintenance of the above measures. Stormwater Runoff Quality: A number of water quality measures have been integrated into the site design to provide for treatment of the stormwater runoff from the site. These include the infiltration/detention basin and the water quality swales that will treat the runoff from the site prior to discharge. Conveyance System: The on-site conveyance system consists of a piped stormwater system discharging to the infiltration/detention basin on the Calvary church site and water quality swales on the Katten site. The piped drainage system has been designed to accommodate the runoff from a 10 Yr design storm. Discharge at the Natural Location: The Katten site presently drains to Farm Brook, and will continue to under developed conditions. The Calvary Site presently drains to the swale along the north side of the Calvary Church site, and will continue to under developed conditions. Maintenance and Operation: The following maintenance operations will be required to ensure the proper and efficient operation of the Storm Water System, Infiltration/Detention basin and Water Quality Swales. The following maintenance schedule is intended to be a minimum guide, and additional inspections and maintenance measures may be required following large storm events that could cause the deposition of excess debris in the system. Pipe Outlet Locations: The pipe outlets and associated riprap shall be inspected annually and cleaned of silt and or debris. The riprap shall be re-shaped and replenished as required. Catch Basins: The catch Basins within each lot shall be inspected annually. The sumps shall be cleaned when the depth of material within the sumps reaches 1'. Pavement Sweeping-- The pavement areas shall be swept at a minimum of once per year, in the spring shortly after the end of the snow season. Infiltration/Detention Water Quality Basin and Water Quality Swales: The water quality basin and water quality swales shall be inspected twice yearly. All large woody growth that may affect the flow of water or the stability of the basin or swales shall be removed. The spillway shall also be inspected after any flow passes through it. The riprap shall be re-arranged and added to as required to maintain the design as per the design plans. Any erosion or other problems that may affect the proper operation of the water quality basin or water quality swales shall be repaired promptly. Topographic Contour Maps: Topographic contour maps have been provided showing the drainage areas for the two sites at a scale of 1"=40'. The maps showing the existing and developed conditions are included in the rear of this report. Floodplain Boundaries: There are floodplain boundaries on the Katten site. Drainage Design: The drainage design of the site has been completed utilizing a number of computer programs and generally accepted design methods. The runoff from the site under existing and developed conditions was developed utilizing the TR-55 computer program. The drainage piping on site was designed using the rational formula. The detention/Infiltration basin was sized using a computer program by Hydrographs called Hydroflow. The program allows for the development of hydrographs representing the developed flows into the basin, and the modeling of the basin with elevation/storage/discharge curves to represent the basin. The program than provides the routing of the hydrograph through the basin, and provides peak discharge and storage information. The intent of the design is to provide sufficient detention/infiltration on the Calvary church site to mitigate the peak stormwater discharges from the development of both sites. The existing Calvary site and Katten site were modeled using the TR-55 computer program. The small portion of the Calvary site that presently drains to the northeast was not included in the existing conditions drainage calculations. Only the portion of the site draining to the northwest was included in the calculations. On the Katten site,only the portion of the site that will be developed as part of the proposed development was included in the calculations. The TR-55 calculations for the Calvary and Katten sites are included in appendix B and C respectively. The Calvary site was analyzed under developed conditions using the TR-55 computer program. Under developed conditions,there will be an increase in peak runoff from the site. The results of the TR-55 analysis are included in appendix D, and the existing and developed peak discharges(in cubic feet per second) are summarized below: Storm Freq. Existing Peak Discharge Developed Peak Discharge 2 2 3 10 6 8 25 8 11 50 11 14 100 13 17 The Katten site was analyzed under developed conditions using the TR-55 computer program. Under developed conditions,there will be an increase in peak runoff rates from the site. The results of the TR-55 analysis are included in appendix E, and the existing and developed peak discharges are summarized below: Storm Freq. Existing Peak Discharge Developed Peak Discharge 2 2 5 10 6 9 25 8 12 50 10 14 100 12 16 The discharges from both sites end up in the farm brook. In order to mitigate for the peak flows from each property, a detention/infiltration basin is proposed on the Calvary site. The basin has been sized to provide sufficient detention for the 2-100 year storm events. The basin is sized to provide the equal or less peak flows than under existing conditions from the combination of both properties. The design peak flow would therefore be the existing total peak flow from both properties less the developed peak discharge from the Katten property. The results are summarized below: Storm Freq. Total Exist. Devel. Peak Disch. Req'd Discharge Peak Discharge Katten Property) (Detention Basin) 2 4 5 -1 10 12 9 3 25 16 12 4 50 21 14 7 100 25 16 9 The design discharge from the proposed detention basin has a design discharge for the 2 year design storm of-1 cubic foot per second (CFS). The 10 year through 100 year design storms range from 3-9 CFS. The -1 CFS is due to rounding of design flows within the TR-55 analysis to the nearest 1 CFS. The proposed detention basin was modeled using the Hydrograph Hydroflo computer program. The basin design is included in appendix F. The Routing of the storm flows under developed conditions for the 2-100 year storm events was prepared, and is included in appendix G. The summary of the total flow under existing and developed conditions is summarized herein: Storm Frequency Required Discharge (Detention Basin) Design Discharge 2 -1 0.28 10 3 0.69 25 4 0.97 50 7 1.23 100 9 1.45 As can be seen from the detention basin design,the discharge for the 2-100 year storm events is generally substantially less than the existing peak discharge into Farm Brook. Water Quality: A number of measures have been integrated into the site design to address water quality issues from the development of the site. The two most significant design measures are the infiltration/detention basin on the Calvary site, and the water quality swales on the Katten site. The infiltration/detention basin has been designed with a volume below the outlet discharge pipe that will provide capacity for the initial flush from the site. This volume exceeds the volume of runoff from the site for a 1.25"rainfall event. The water quality swales have been designed on the Katten site to provide settling and contact with vegetation for the storm runoff prior to discharge to the wetlands. The swales are a minimum of 200' long, and provide stone berms to promote settling and infiltration of runoff from smaller storm events. On-Site Storm Sewer Calculations: The storm sewer calculations for the storm piping within the proposed private roadways are included in appendix H for the Calvary Site and appendix I for the Katten Site. The storm sewer has been designed for a 10-year design storm utilizing the rational formula. Conclusions: The on-site stormwater system with the associated infiltration/detention basin and water quality swales will mitigate any potential water quality and quantity impacts from the development of the site. APPENDIX A S�Agti,G '¢,�� � �� � Ag10 �� ��" '`bS ►r KENT AIIl1'� PGF, oO�AFL ('�NF coctiys ?O 2Q� ?� 74 ��2 g /t7 NCRO • '—use 3 s '< SAND �c2, zj � f 11 ROAD ROB p�Alq� S ,,tea � HERITAGE a�'z�Q a`y �vq"' K2� p/�"W Po KUPCH 4 � 3 �i oe o DRIVE U DR v DRIVE /GF MEW � AM 74 IMAX v �v raw MA" a m gR� �a 3 RDw ao 194 j SERF/F fj0 \/ 3 Mr dp m�t o IAWAW R� r w o��(4eR�OY kv� -elCMD Mt itwm EWNOTO 0 ROA < t Qp �Y gp`F\�Iv��,y �NBOW Y OFFICE p9*i Jl F `F� kRq pPY �4?/yyp pR/� Almwr svx�c N �Rl, q. � �q�j�, (y /LOAM' $e � 4aR�Y lg1F 4�10y y3�A �F �V Op/� MW 9m yrA/y EW � � q�?p sl � 4 a wMraIar ao awo� THOMPSON �N RCLE(Pvt) � C r WATSON y SAD pyt) NEB) DRAKE a AY T(Pk) ... 'i (;R WAS-co'rt ICgjgT Q 0 �vtl lP� 9 tl_ SMITH sTREEr DESIGN PROFESSIONALS, INC. LOCATION PLAN N.T.S. APPENDIX B RUNOFF CURVE NUMBER COMPUTATION Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: EXISTING CONDITIONS CALVERY PROPERTY 10/27/03 (1823EC) ------------------------------------------------------------------------------- Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ----------------------------- ------------------------------------------------- OTHER AGRICULTURAL LANDS Pasture, grassland or range good - 6 .85 (61) - - Total Area (by Hydrologic Soil Group) 6 .85 ------------------------------------------------------------------------------- TOTAL DRAINAGE AREA: 6 . 85 Acres WEIGHTED CURVE NUMBER: 61* ------------------------------------------------------------------------------- * - Generated for use by GRAPHIC method TIME OF CONCENTRATION AND TRAVEL TIME Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: EXISTING CONDITIONS CALVERY PROPERTY 10/27/03 (1823EC) ------------------------------------------------------------------------------- Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) ------------------------------------------------------------------------------ Sheet 3 .2 200 .04 E 0 .215 Shallow Concent'd 200 .04 U 0 .017 Open Channel 400 2 0 .056 Time of Concentration = 0 .29* --- Sheet Flow Surface Codes --- A Smooth 'Surface F Grass, Dense --- Shallow Concentrated --- B Fallow (No Res . ) G Grass, Burmuda --- Surface Codes --- C Cultivated < 20 o Res . H Woods, Light P Paved D Cultivated > 20 o Res. I Woods, Dense U Unpaved E Grass-Range, Short J Range, Natural * - Generated for use by GRAPHIC method GRAPHICAL PEAK DISCHARGE METHOD Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: EXISTING CONDITIONS CALVERY PROPERTY 10/27/03 (1823EC) Data: Drainage Area 6 .85 * Acres Runoff Curve Number 61 * Time of Concentration: 0 .29 * Hours Rainfall Type III Pond and Swamp Area NONE Storm Number 1 2 3 4 5 ---------------------- ------ ------ ------ ------ ------ Frequency (yrs) 2 10 25 50 100 24-Hr Rainfall (in) 3 .2 4 .7 5 .5 6 .2 6 .9 Ia/P Ratio 0 .40 0 .27 0 .23 0 .21 0 .19 Runoff (in) 0 .44 1 .19 1.68 2 .14 2 .63 Unit Peak Discharge 0 .525 0 . 688 0 .711 0 .726 0 .738 (cfs/acre/in) - Pond and Swamp Factor 1.00 1 .00 1.00 1 .00 1.00 0 . 0% Ponds Used Peak Discharge (cfs) 2 6 8 11 13 * - Value (s) provided from TR-55 system routines APPENDIX C RUNOFF CURVE NUMBER COMPUTATION Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: EXISTING CONDITIONS KATEN PROPERTY 10/27/03 (1823EK) ------------------------------------------------------------------------------- Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ------------------------------------------------------------------------------- OTHER AGRICULTURAL LANDS Pasture, grassland or range fair - 4.04 (69) - - Total Area (by Hydrologic Soil Group) 4 .04 ------------------------------------------------------------------------------- TOTAL DRAINAGE AREA: 4.04 Acres WEIGHTED CURVE NUMBER: 69* ------------------------------------------------------------------------------- * - Generated for use by GRAPHIC method TIME OF CONCENTRATION AND TRAVEL TIME Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: EXISTING CONDITIONS KATEN PROPERTY 10/27/03 (1823EK) ------------------------------------------------------------------------------- Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) ------------------------------------------------------------------------------- Sheet 3 .2 150 .03 J 0 .171 Shallow Concent'd 200 . 03 U 0 .020 Open Channel 100 2 0 .014 Time of Concentration = 0 .21* --- Sheet Flow Surface Codes --- A Smooth' Surface F Grass, Dense --- Shallow Concentrated --- B Fallow (No Res . ) G Grass, Burmuda --- Surface Codes --- C Cultivated < 20 o Res. H Woods, Light P Paved D Cultivated > 20 o Res. I Woods, Dense U Unpaved E Grass-Range, Short J Range, Natural * - Generated for use by GRAPHIC method GRAPHICAL PEAK DISCHARGE METHOD Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: EXISTING CONDITIONS KATEN PROPERTY 10/27/03 (1823EK) Data: Drainage Area 4 .04 * Acres Runoff Curve Number 69 * Time of Concentration: 0 .21 * Hours Rainfall Type I I I Pond and Swamp Area NONE ------------------ Storm Number 1 2 3 4 5 ---------------------- ------ ------ ------ ------ ------ Frequency (yrs) 2 10 25 50 100 24-Hr Rainfall (in) 3 .2 4.7 5 .5 6 .2 6 .9 Ia/P Ratio 0 .28 0 .19 0 .16 0 .14 0 .13 Runoff (in) 0 . 78 1.74 2 .33 2 .87 3 .43 Unit Peak Discharge 0 .764 0 .817 0 . 833 0 .844 0 .853 (cfs/acre/in) Pond and Swamp Factor 1.00 1.00 1.00 1.00 1.00 0 .0o Ponds Used Peak Discharge (cfs) 2 6 8 10 12 ----------------------------------------------------------- ----------------------------------------------------------- * - Value (s) provided from TR-55 system routines APPENDIX D RUNOFF CURVE NUMBER COMPUTATION Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: DEVELOPED CONDITIONS CALVERY PROPERTY 10/27/03 (1823DC) ----------------------------------------------------------------------- Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ----------------------------------------------------------------------------- FULLY DEVELOPED URBAN AREAS (Veg Estab. ) Open space (Lawns,parks etc. ) Good condition; grass cover > 750 - 2 .5 (61) - - Impervious Areas Paved parking lots, roofs, driveways - 1.35 (98) - - OTHER AGRICULTURAL LANDS Pasture, grassland or range good - 3 .0 (61) - - Total Area (by Hydrologic Soil Group) 6 .85. ------------------------------------------------------------------------------- TOTAL DRAINAGE AREA: 6.85 Acres WEIGHTED CURVE NUMBER: 68* ------------------------------------------------------------------------------- * - Generated for use by GRAPHIC method TIME OF CONCENTRATION AND TRAVEL TIME Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: DEVELOPED CONDITIONS CALVERY PROPERTY 10/27/03 (1823DC) ------------------------------------------------------------------ Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) ---------------------------------------------------------------------- Sheet 3 .2 200 .04 E 0 .215 Shallow Concent'd 200 .04 U 0 .017 Open Channel 400 2 0 .056 Time of Concentration = 0 .29* Sheet Flow Surface Codes --- A Smooth Surface F Grass, Dense --- Shallow Concentrated --- B Fallow (No Res . ) G Grass, Burmuda --- Surface Codes --- C Cultivated < 20 o Res . H Woods, Light P Paved D Cultivated > 20 o Res . I Woods, Dense U Unpaved E Grass-Range, Short J Range, Natural * - Generated for use by GRAPHIC method GRAPHICAL PEAK DISCHARGE METHOD Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: DEVELOPED CONDITIONS CALVERY PROPERTY 10/27/03 (1823DC) Data: Drainage Area 6 .85 * Acres Runoff Curve Number 68 * Time of Concentration: 0 .29 * Hours Rainfall Type III Pond and Swamp Area NONE Storm Number T 1 2 3 4 5 ---------------------- ------ ------ ------ ------ ------ Frequency (yrs) 2 10 25 50 100 24-Hr Rainfall (in) 3 .2 4 .7 5 .5 6 .2 6 .9 Ia/P Ratio 0 .29 0 .20 0 .17 0 .15 0 .14 Runoff (in) 0 .73 1 .67 2 .24 2 .78 3 .33 Unit Peak Discharge 0 .675 0 .729 0 .746 0 .758 0 .767 (cfs/acre/in) Pond and Swamp Factor 1.00 1 .00 1.00 1.00 1.00 0 .01 Ponds Used Peak Discharge (cfs) 3 8 11 14 17 * - Value (s) provided from TR-55 system routines APPENDIX E RUNOFF CURVE NUMBER COMPUTATION Version 2 . 00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: DEVELOPED CONDITIONS KATEN PROPERTY 10/27/03 (1823DK) ------------------------------------------------------------------------------- Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ------------------------------------------------------------------------------- FULLY DEVELOPED URBAN AREAS (Veg Estab. ) Open space (Lawns,parks etc. ) Good condition; grass cover > 750 - 2 .01 (61) - - Impervious Areas Paved parking lots, roofs, driveways - 2 .03 (98) - - Total Area (by Hydrologic Soil Group) 4 .04 -------------------------------------------------------7----------------------- TOTAL DRAINAGE AREA: 4 .04 Acres WEIGHTED CURVE NUMBER: 80* ------------------------------------------------------------------------------- * - Generated for use by GRAPHIC method TIME OF CONCENTRATION AND TRAVEL TIME Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: DEVELOPED CONDITIONS KATEN PROPERTY 10/27/03 (1823DK) ------------------------------------------------------------------------------- Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) ------------------------------------------------------------------------------- Sheet 3 .2 150 . 03 J 0 .171 Shallow Concent'd 200 .03 U 0 .020 Open Channel 100 2 0 .014 Time of Concentration = 0 .21* --- Sheet Flow Surface Codes --- A Smooth 'Surface F Grass, Dense --- Shallow Concentrated --- B Fallow (No Res. ) G Grass, Burmuda --- Surface Codes --- C Cultivated < 20 o Res. H Woods, Light P Paved D Cultivated > 20 o Res. I Woods, Dense U Unpaved E Grass-Range, Short J Range, Natural * - Generated for use by GRAPHIC method GRAPHICAL PEAK DISCHARGE METHOD Version 2 .00 Project : BERRY PATCH II User: GBS Date: 10/27/99 County : HARTFORD State: CT Checked: Date: Subtitle: DEVELOPED CONDITIONS KATEN PROPERTY 10/27/03 (1823DK) Data: Drainage Area 4.04 * Acres Runoff Curve Number 80 * Time of Concentration: 0.21 * Hours Rainfall Type III Pond and Swamp Area NONE ----------------------------------------------------------- ----------------------------------------------------------- Storm Number 1 2 3 4 5 ---------------------- ------ ------ ------ ------ ------ Frequency (yrs) 2 10 25 50 100 24-Hr Rainfall (in) 3 .2 4 .7 5 .5 6 .2 6 .9 Ia/P Ratio 0 . 16 0 .11 0 . 09 0 .08 0 .07 Used 0 . 16 0 :11 0 .10 0 .10 0 .10 Runoff (in) 1.40 2 .63 3 .33 3 .96 4 . 60 Unit Peak Discharge 0 .837 0 . 867 0. 871 0 .871 0 .871 (cfs/acre/in) Pond and Swamp Factor 1.00 1.00 1. 00 1.00 1.00 0 . 0% Ponds Used Peak Discharge (cfs) 5 9 12 14 16 ----------------------------------------------------------- ----------------------------------------------------------- * - Value (s) provided from TR-55 system routines APPENDIX F Reservoir Report Page 1 Reservoir No. 1 - detention basin Hydraflow Hydrographs by Intelisolve Pond Data Pond storage is based on known contour areas. Conic method used. Stage/Storage Table stage(ft) Elevation(ft) Contour area(sgft) Incr.Storage(cuft) Total storage(cult) 0.00 134.00 5,600 0 0 1.00 136.00 9,600 7,510 7,510 2.00 136.00 9,600 9,599 17,109 3.00 137.00 10,450 10,021 27,130 4.00 138.00 11,300 10,871 38,001 5.00 139.00 12,950 12,114 50,116 6.00 140.00 14,625 13,778 63,893 Culvert/Orifice Structures Weir Structures [Al [B] [C] [D] [A] [B] [C] [D] Rise in = 15.0 6.0 0.0 0.0 Crest Len ft = 0.00 0.00 0.00 0.00 Span in = 15.0 6.0 0.0 0.0 Crest El.ft = 0.00 0.00 0.00 0.00 No.Barrels = 1 1 0 0 Weir Coeff. = 0.00 0.00 0.00 0.00 Invert El.ft = 135.00 136.00 0.00 0.00 Weir Type = - - - - Length ft = 60.0 1.0 0.0 0.0 Multi-Stage = No No No No Slope% = 0.50 1.00 0.00 0.00 N-Value = .013 .013 .000 .000 Orif.Coeff. = 0.60 0.60 0.00 0.00 Multi-Stage = n/a Yes No No Exfiltration Rate = 0.00 in/hr/sgft Tailwater Elev.= 0.00 It Note:All outflows have been analyzed under inlet and outlet control. Stage/Storage/Discharge Table Stage Storage Elevation Clv A Clv B Civ C Clv D Wr A Wr B Wr C Wr D Exfil Total ft cuff ft cfs cfs cfs cfs cfs cfs cfs cis cfs cfs 0.00 0 134.00 0.00 0.00 - - - - - - - 0.00 1.00 7,510 136.00 0.00 0.00 - - - - - - - 0.00 2.00 17,109 136.00 0.75 0.00 - - - - - -- -- 0.00 3.00 27,130 137.00 0.82 0.82 - - - -- - - - 0.82 4.00 38,001 138.00 1.29 1.25 - - - - - - - 1.25 5.00 50,116 139.00 1.59 1.57 - - - - -- - - 1.57 6.00 63,893 140.00 1.86 1.83 - - - - - - - 1.83 APPENDIX G Hydrograph Report Page, Hydraflow Hydrographs by Intelisotve Hyd. No. 2 Hydrograph type = Reservoir Peak discharge = 0.28 cfs Storm frequency = 2 yrs Time interval = 6 min Inflow hyd. No. = 1 Reservoir name = detention basin Max. Elevation = 136.34 ft Max. Storage = 10,744 cuft Storage Indication method used. Outflow hydrograph volume=9,850 cult Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Civ C Civ D Wr A Wr B Wr C Wr D EAU Outflow (hrs) ds , ft ds cfs ds ds ds cfs ds cfs cfs efs 13.60 0.58 136.15 0.08 0.07 --_ __- _- _- _____ ____ ___ 0.07 13.70 0.56 136.17 0.10 0.09 ----- ---- ----- ---- ---- ----- --- 0.09 13.80 0.55 136.19 0.11 0.10 ----- ---- ----- ---- ---- ----- ---- 0.10 13.90 0.53 136.20 0.13 0.12 - - - - - - - 0.12 14.00 0.51 136.22 0.15 0.13 -- -- --- --- --- --- ---- 0.13 14.10 0.49 136.23 0.17 0.15 ----- --- --- - ---- -- ---- 0.15 14.20 0.48 136.24 0.18 0.17 - ----- - -- ---- -- --- 0.17 14.30 0.46 136.25 0.20 0.18 -- ----- -- ---- --- ----- ----- 0.18 14.40 0.45 136.26 0.21 0.19 ---- --- ---- ----- ----- ---- ----- 0.19 14.50 0.44 136.27 0.22 0.20 - - - - --- - - 0.20 14.60 0.43 136.28 0.24 0.21 -- --- -- --- --- --- ---- 0.21 14.70 0.43 136.29 0.25 0.22 -- -_- -_- ___ _-_ -__ -_ 0.22 14.80 0.42 136.30 0.26 0.23 --- -- ---- ---- --- ----- ----- 0.23 14.90 0.41 136.30 0.26 0.24 -- --- ----- ---- ----- ----- ---- 0.24 15.00 0.40 136.31 0.27 0.25 ----- ----- ----- ----- ---- ---- ---- 0.25 15.10 0.39 136.31 0.28 0.26 - - - - ----- - - 0.26 15.20 0.38 136.32 0.29 0.26 --- - -- --- --- -- -- 0.26 15.30 0.37 136.32 0.29 0.27 --- ----- --- -- --- - --- 0.27 15.40 0.36 136.33 0.30 0.27 --- --- ---- ---- -- --- ----- 0.27 15.50 0.35 136.33 0.30 0.28 ----- ---- ---- ---- ----- --- ----- 0.28 15.60 0.34 136.33 0.31 0.28 ---- ---- ----- ----- ---- --- ---- 0.28 15.70 0.33 136.33 0.31 0.28 - - - -- -- - -- 0.28 15.80 0.31 136.34 0.31 0.28 ---- - ----- ---- - -- --- 0.28 15.90 0.30 136.34 0.31 028 - -- -- ---- ----- - ---- 0.28 16.00 0.29 136.34 0.31 0.28 -- --- ---- ---- ----- ---- ----- 0.28 16.10 0.28 136.34<< 0.31 0.28 --- -- ---- ---- ----- ---- ----- 0.28 << 16.20 0.27 136.34 0.31 0.28 -- ----- ---- ---- ----- ----- ----- 0.28 16.30 0.27 136.34 0.31 0.28 - - - - -- - -- 0.28 16.40 0.26 136.34 0.31 0.28 - - -- ---- ---- - ---- 0.28 16.50 0.26 136.33 0.31 0.28 - -- -- --- ---- -- --- 0.28 16.60 0.25 136.33 0.31 0.28 - -- -- ---- --- ---- ---- 0.28 16.70 0.25 136.33 0.31 0.28 - ----- ----- ---- -- ----- ---- 0.28 16.80 0.24 136.33 0.30 0.28 -- ---- ----- ----- ---- ----- ----- 0.28 16.90 0.24 136.33 0.30 0.28 - - - - - - ----- 0.28 17.00 0.23 136.33 0.30 0.27 - -- --- -- - --- ---- 0.27 17.10 0.23 136.33 0.30 0.27 -- - - --- ---- ----- -- 0.27 17.20 0.22 136.33 0.30 0.27 -- --- - ----- ---- ----- ----- 0.27 17.30 0.22 136.32 0.29 0.27 ----- ----- - ---- ----- ----- --- 0.27 Continues on next page... Page 2 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D ExHl Outflow (hrs) ds ft cfs cfs cfs cfs cfs cfs cfs cfs ds cfs 17.40 0.21 136.32 0.29 0.26 ---- - -- - ---- --- --- 0.26 17.50 0.21 136.32 0.29 0.26 - ----- -- --- ---- ----- ---- 026 17.60 0.20 136.32 0.28 0.26 ---- ---- --- ----- ----- ----- 0.26 17.70 0.20 136.32 0.28 0.26 - - - - - - - 0.26 17.80 0.19 136.31 0.28 0.25 - - ---- -- -- - -- 0.25 17.90 0.19 136.31 0.28 0.25 - - -- - ---- ----- --- 0•25 18.00 0.18 136.31 0.27 0.25 ----- --- ----- --- ----- --- ---- 0.25 18.10 0.18 136.31 0.27 0.24 - ----- ---- ----- --- ---- ---- 0.24 18.20 0.17 136.30 0.26 0.24 ---- --- ---- ----- ----- ----- ----- 0.24 18.30 0.17 136.30 0.26 0.24 - - - -- - - ----- 0.24 18.40 0.17 136.30 0.26 0.24 ---- --- -- - ----- --- -- 0.24 18.50 0.17 136.30 0.25 0.23 - -- --- --- --- ---- -- 0.23 18.60 0.17 136.29 0.25 0.23 -- - -- - -- --- ----- 0.23 18.70 0.17 136.29 0.25 0.23 - --- - ---- --- -- --- 0.23 18.80 0.16 136.29 0.25 0.22 ----- --- ----- ---- ---- ----- ---- 0.22 18.90 0.16 136.29 0.24 0.22 - - - - ---- - - 0.22 19.00 0.16 136.28 0.24 0.22 ---- -- - ___ __- _- ____ 0.22 19.10 0.16 136.28 0.24 0.22 ----- -- ----- -- -- --- ---- 0.22 19.20 0.16 136.28 0.23 0.21 - ---- - ----- -- -- -- 0.21 19.30 0.16 136.28 0.23 0.21 --- --- -- ---- ----- --- --- 0.21 19.40 0.16 136.28 0.23 0.21 ----- ----- ----- ----- ----- ----- ---- 0.21 19.50 0.15 136.27 0.23 0.21 - - - - - - - 0.21 19.60 0.15 136.27 0.22 0.20 ---- -- ----- ---- -- ---- ---- 0.20 19.70 0.15 136.27 0.22 0.20 ----- -- --- --- ---- -- --- 0.20 19.80 0.15 136.27 0.22 0.20 -- ---- ----- ___ -- _____ _- 0.20 19.90 0.15 136.27 0.22 0.20 -- ---- ---- --- --- --- ----- 0.20 20.00 0.15 136.27 0.21 0.19 ----- ---- ----- ---- ----- ----- ----- 0.19 20.10 0.15 136.26 0.21 0.19 - - - - -- - - 0.19 20.20 0.14 136.26 0.21 0.19 --- --- --- --- ----- ---- --- 0.19 20.30 0.14 136.26 0.21 0.19 ----- --- --- --- -- ---- --- 0.19 20.40 0.14 136.26 0.20 0.19 - -- --- - --- -- - 0.19 20.50 0.14 136.26 0.20 0.18 - --- ----- -- -- ----- ----- 0.18 20.60 0.14 136.26 0.20 0.18 ----- . ----- ---- --- ---- ----- --- 0.18 20.70 0.14 136.25 0.20 0.18 - ----- - - -- - --- 0.18 20.80 0.13 136.25 0.20 0.18 ---- -- --- - ----- -- -- 0.18 20.90 0.13 136.25 0.19 0.18 ---- --- -- ----- -- ----- --- 0.18 21.00 0.13 136.25 0.19 0.17 ---_ ___ ____ _- _- ___ ___ 0.17 21.10 0.13 136.25 0.19 0.17 -- --- ---- ---- --- ---- -- 0.17 21.20 0.13 136.25 0.19 0.17 ----- ---- ----- ---- ----- ----- ---- 0.17 21.30 0.13 136.24 0.19 0.17 - - - - - - - 0.17 21.40 0.13 136.24 0.18 0.17 -- - ----- --- -- -- - 0.17 21.50 0.12 136.24 0.18 0.16 - -- - - -- --- --- 0.16 21.60 0.12 136.24 0.18 0.16 ---- - ---- -- -- -- --- 0.16 21.70 0.12 136.24 0.18 0.16 - _- ___ _____ ____ _____ _-_ 0.16 21.80 0.12 136.24 0.18 0.16 ---- --- ----- ---- ---- ----- ---- 0.16 21.90 0.12 136.24 0.17 0.16 - - - - - - - 0.16 22.00 0.12 136.23 0.17 0.15 -- ----- ----- - - ---- --- 0.15 22.10 0.13 136.23 0.17 0.15 -- -- --- - -- - - 0.15 22.20 0.15 136.23 0.17 0.15 - - - - - - --- 0.15 22.30 0.14 136.23 0.17 0.15 -- -__ -_ -__ ____ ____ _-_ 0.15 22.40 0.13 136.23 0.17 0.15 --- -- ----- ---- ---- ----- ---- 0.15 Continues on next page... Page 3 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D ExFJ1 Outflow (hm) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cis cfs 22.50 0.12 136.23 0.17 0.15 ----- -- -- -- --- ---- ---- 0.15 22.60 0.12 136.23 0.17 0.15 ---- ----- ---- ---- ----- ----- ---- 0.15 22.70 0.12 136.23 0.16 0.15 ----- ---- ----- ----- ----- ----- ----- 0.15 22.80 0.11 136.23 0.16 0.15 - - - - - - - 0.15 22.90 0.11 136.23 0.16 0.14 -- ---- --- --- --- - - 0.14 23.00 0.11 136.22 0.16 0.14 --- --- ---- --- --- -- -- 0.14 23.10 0.11 136.22 0.16 0.14 --- ----- -- -- --- ----- ---- 0.14 23.20 0.11 136.22 0.16 0.14 - --- ----- ----- ---- ----- -- 0.14 23.30 0.11 136.22 0.16 0.14 --- ---- ----- ----- ----- ----- ---- 0.14 23.40 0.11 136.22 0.15 0.14 - - -- -- - - - 0.14 23.50 0.11 136.22 0.15 0.14 - - ---- --- - -- --- 0.14 23.60 0.10 136.22 0.15 0.13 --- --- - -- -- ---- ---- --- 0.13 23.70 0.10 136.22 0.15 0.13 -- ____ _____ -_ ____ ____ -__ 0.13 23.80 0.10 136.22 0.15 0.13 --- ---- ---- --- ---- ----- ---- 0.13 23.90 0.10 136.21 0.15 0.13 --- ----- ---- ----- ---- ----- ----- 0.13 24.00 0.10 136.21 0.15 0.13 - - - --- -- - - 0.13 24.10 0.08 136.21 0.14 0.13 - - --- -- -- -- -- ---- 0.13 24.20 0.05 136.21 0.14 0.12 -- ---- -- -- --- -- --- 0.12 24.30 0.02 136.21 0.14 0.12 ---- -- --- --- ---- --- ---- 0.12 24.40 0.01 136.20 0.13 0.12 --__ _- ___ ___ _---- _____ _-_ 0.12 24.50 0.00 136.20 0.13 0.11 ---- ----- ----- ----- ----- ----- ----- 0.11 24.60 0.00 136.19 0.12 0.11 - -- - -- - - - 0.11 24.70 0.00 136.19 0.12 0.10 --- ---- -- --- --- -- --- 0.10 24.80 0.00 136.19 0.11 0.10 -- -- ---- -- --- - --- 0.10 24.90 0.00 136.18 0.11 0.10 - ----- ---- -- ---- --- -- 0.10 25.00 0.00 136.18 0.11 0.10 ---- -- --- --- ----- --- -- 0.10 25.10 0.00 136.18 0.10 0.09 --- ---- ----- ----- ---- ----- ----- 0.09 25.20 0.00 136.17 0.10 0.09 -- ---- - - -- - --- 0.09 25.30 0.00 136.17 0.10 0.09 - ----- ---- - --- --- ----- 0.09 25.40 0.00 136.17 0.09 0.08 -- --- -- -- -- --- --- 0.08 25.50 0.00 136.16 0.09 0.08 --- --- ---- ---- ---- ----- ---- 0.08 25.60 0.00 136.16 0.09 0.08 ---- ---- --- ---- -- ----- ----- 0.08 25.70 0.00 136.16 0.09 0.08 ----- ----- ----- ----- ----- ----- ----- 0.08 25.80 0.00 136.15 0.08 0.07 - - ----- - --- - - 0.07 25.90 0.00 136.15 0.08 0.07 -- ---- --- ---- --- ---- ----- 0.07 26.00 0.00 136.15 0.08 0.07 -- -- --- ----- ____ _____ ____ 0.07 26.10 0.00 136.15 0.08 0.07 ---- --- --- --- --- ----- ----- 0.07 26.20 0.00 136.14 0.07 0.07 --- ---- ---- ---- --- ---- ----- 0.07 26.30 0.00 136.14 0.07 0.06 ----- ----- ---- ----- ---- ----- ----- 0.06 26.40 0.00 136.14 0.07 0.06 - - - - -- -- -- 0.06 26.50 0.00 136.14 0.07 0.06 ----- -- - ----- ---- --- --- 0.06 26.60 0.00 136.13 0.06 0.06 - - --- -- --- -- --- 0.06 26.70 0.00 136.13 0.06 0.06 ---- ---- ---- ----- ----- ----- ---- 0.06 ...End Hydrograph Report Page, Hydraflow Hydrographs by Intelisolve Hyd. No. 2 Hydrograph type = Reservoir Peak discharge = 0.69 cfs Storm frequency = 10 yrs Time interval = 6 min Inflow hyd. No. = 1 Reservoir name = detention basin Max. Elevation = 136.78 ft Max. Storage = 24,043 cuft Storage Indication method used. Outflow hydrograph volume=22,444 cuft Hydrograph Discharge Table Time Inflow Elevation CIv A CIv B CIv C CIv D Wr A Wr B Wr C Wr D EMI Outflow (hrs) ds , ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 12.30 7.88 136.32 0.28 0.26 ----_ -- -- -- --- ---- --_ 0.26 12.40 6.86 136.58 0.56 0.54 -__ ___ _- ___ ___ ----- _____ 0.54 12.50 5.27 136.78<< 0.72 0.69 ----- --- ---- ----- ----- ----- ---- 0.69<< 12.60 3.75 136.58 0.57 0.55 - - - - - - - 0.55 13.00 1.65 136.26 0.20 0.18 -- - - --- --- - --- - 0.18 13.10 1.51 136.30 0.27 0.24 --- --- -- ---- ---- -- --- 0.24 13.20 1.39 136.35 0.33 0.30 ---- -- ----- -- - ---- --- 0.30 13.30 1.31 136.38 0.38 0.35 --- - ---_ ____ ____ -__ -___ 0.35 13.40 1.26 136.42 0.42 0.38 ----- ----- ---- ----- ----- ----- ---- 0.38 13.50 1.22 136.45 0.44 0.42 - - - ---- - - - 0.42 13.60 1.18 136.47 0.45 0.45 --- - - --- --- -- - 0.45 13.70 1.14 136.50 0.47 0.47 ----- - -- ---- --- -- ---- 0.47 13.80 1.10 136.52 0.50 0.49 --- - - -- --- ---- ---- 0.49 13.90 1.06 136.54 0.52 0.51 ---- --- --- ----- --- ---- ----- 0.51 14.00 1.02 136.56 0.55 0.53 ----- ---- ----- ----- ----- ----- ----- 0.53 14.10 0.98 136.58 0.56 0.54 - - - - - - ---- 0.54 14.20 0.95 136.59 0.58 0.55 -- ---- ---- -- --- -- --- 0.55 14.30 0.92 136.61 0.59 0.56 ---- -- ___ _-_ _____ ____ ____ 0.56 14.40 0.90 136.62 0.60 0.57 - -- -- _____ _____ -__ ___ 0.57 14.50 0.88 136.63 0.61 0.58 ----- ---- --- ---- ---- ---- ----- 0.58 14.60 0.86 136.64 0.62 0.59 ----- ----- ----- ----- ---- ---- ----- 0.59 14.70 0.84 136.65 0.63 0.60 - ----- - - - -- - 0.60 14.80 0.82 136.66 0.63 0.60 - --- --- ---- -- --- ---- 0.60 14.90 0.80 136.67 0.64 0.61 ---_ ____ ___ ____ ____ -_ ___ 0.61 15.00 0.78 136.67 0.64 0.61 - --- - -- -__ _- --_ 0.61 15.10 0.76 136.68 0.64 0.62 ---- ---- --- ----- ---- --- --- 0.62 15.20 0.74 136.68 0.65 0.62 ----- ---- ---- ---- ----- ----- ----- 0.62 15.30 0.72 136.69 0.65 0.62 - - - - - - - 0.62 15.40 0.70 136.69 0.65 0.63 - - -- - - - - 0.63 15.50 0.68 136.69 0.65 0.63 - ----- -- - - ---- --- 0.63 15.60 0.66 136.69 0.66 0.63 - - - ----- -- -- --- 0.63 15.70 0.63 136.69 0.66 0.63 --- - -- --- --- --- ----- 0.63 15.80 0.61 136.69 0.66 0.63 ----- ----- ----- --- ----- ---- ----- 0.63 15.90 0.59 136.69 0.66 0.63 - - - - - - - 0.63 16.00 0.57 136.69 0.65 0.63 - - -- -- -- ----- - -- 0.63 16.10 0.55 136.69 0.65 0.62 -- -_ - - -- -- --- 0.62 16.20 0.53 136.68 0.65 0.62 ---- --- ----- --- --- --- ____ 0.62 16.30 0.52 136.68 0.65 0.62 ---- --- --- ---- ----- ---- ---- 0.62 Continues on next page... Page 2 Hydrograph Discharge Table Time Inflow Elevation Clv A Civ B Clv C Clv D Wr A Wr B Wr C Wr D EMI Outflow (hrs) ds ft cfs cfs cfs cfs ds ds cfs ds cfs cfs 16.40 0.50 136.68 0.64 0.62 -- - ---- -- -- ---- ---- 0.62 16.50 0.49 136.67 0.64 0.61 ----- ---- ---- ----- ----- ----- --- 0.61 16.60 0.49 136.67 0.64 0.61 ----- ----- ----- ----- ----- ----- ----- 0.61 16.70 0.48 136.66 0.64 0.61 - - - - - - - 0.61 16.80 0.47 136.66 0.63 0.60 - - -_- -- - ----- - 0.60 16.90 0.46 136.65 0.63 0.60 - --- ---- ---- --- -- -- 0.60 17.00 0.45 136.65 0.62 0.60 -- - --- - -- ----- --- 0.60 17.10 0.44 136.64 0.62 0.59 ----- ---- -_ ---- --- --- --- 0.59 17.20 0.43 136.64 0.62 0.59 ----- ----- ----- ---- --- - ----- ----- 0.59 17.30 0.42 136.63 0.61 0.58 - - - - - -- -- - 0.58 17.40 0.41 136.63 0.61 0.58 - -- - - - ----- - 0.58 17.50 0.40 136.62 0.60 0.57 -- -- - --- ---- ---- -- 0.57 17.60 0.39 136.61 0.60 0.57 ----- ----- --- - -- --- ---- 0.57 17.70 0.38 136.61 0.59 0.56 ---- --- ----- --- -- __- _____ 0.56 17.80 0.37 136.60 0.59 0.56 ----- ----- --- ----- ----- ----- ----- 0.56 17.90 0.36 136.59 0.58 0.55 - - - - - - - 0.55 18.00 0.35 136.59 0.57 0.55 -- - - - - - - 0.55 18.10 0.34 136.58 0.57 0.54 --- -_ - ---- ---- ---- --- 0.54 18.20 0.33 136.57 0.56 0.54 --- --- - --_ --- -- --- 0.54 18.30 0.33 136.56 0.55 0.53 ----- -- ---- - --- ---- 0.53 18.40 0.32 136.56 0.54 0.52 ----- ----- ---- ----- ----- ----- ---- 0.52 18.50 0.32 136.55 0.53 0.52 - - - ----- ----- - - 0.52 18.60 0.32 136.54 0.52 0.51 ---_ -- --- - _- - - 0.51 18.70 0.32 136.54 0.52 0.50 - -_ --_ -- --- _-- -- 0.50 18.80 0.31 136.53 0.51 0.50 - ---- -- --- _-_ -_- _____ 0.50 18.90 0.31 136.52 0.50 0.49 -__ ____ ___ ____ _-_ ____ - 0.49 19.00 0.31 136.52 0.49 0.49 ----- --_ ---- ----- ---- ----- ----- 0.49 19.10 0.30 136.51 0.48 0.48 - - - - - - - 0.48 19.20 0.30 136.50 0.48 0.48 -- - - --_ - _-- -- 0.48 19.30 0.30 136.50 0.47 0.47 --- -- --- --_- -_ __-- _-_- 0.47 19.40 0.30 136.49 0.47 0.46 - - ----- - -- ---- --- 0.46 19.50 0.29 136.49 0.46 0.46 --- -- ---- ---- ---- ----- -_- 0.46 19.60 0.29 136.48 0.46 0.45 ----- ---- ----- ---- ----- ----- ----- 0.45 19.70 0.29 136.47 0.45 0.45 - - - - - - - 0.45 19.80 0.28 136.47 0.45 0.44 ---- ---- ---- - - - - 0.44 19.90 0.28 136.46 0.45 0.43 -- -- ----- ----- --- __- -_ 0.43 20.00 0.28 136.46 0.44 0.43 - --- ---- --- - --- --_- 0.43 20.10 0.28 136.45 0.44 0.42 ---- ---- ---_ __- ---_ -_- ___ 0.42 20.20 0.27 136.45 0.44 0.42 ----- ----- ---- ----- ----- ----- ----- 0.42 20.30 0.27 136.44 0.43 0.41 - - - - - - - 0.41 20.40 0.27 136.44 0.43 0.41 - - - - --- ---- - 0.41 20.50 0.26 136.43 0.43 0.40 ---- - -_ --- -_ -- ----- 0.40 20.60 0.26 136.43 0.42 0.40 - - -_ - - -_- ---- 0.40 20.70 0.26 136.42 0.42 0.39 --- --- ----- --- ---- ---- ---- 0.39 20.80 0.25 136.42 0.42 0.39 ----- --- ---- ----- ---- ----- ----- 0.39 20.90 0.25 136.41 0.41 0.38 - - - - - - - 0.38 21.00 0.25 136.41 0.41 0.38 - - - --- - - - 0.38 21.10 0.25 136.40 0.41 0.37 ----- -- --- - -- --- -_ 0.37 21.20 0.24 136.40 0.40 0.37 - ----- - - - --- --_ 0.37 21.30 0.24 136.39 0.40 0.36 ---- ----- ---- ----- ----- ---- --- 0.36 21.40 0.24 136.39 0.39 0.35 ----- ---- ----- ----- --- ---- ----- 0.35 Continues on next page... Page 3 Hydrograph Discharge Table Time Inflow Elevation Clv A Civ B Clv C Clv D Wr A Wr B Wr C Wr D Exfi1 Outflow (hrs) cfs It cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 21.50 0.23 136.39 0.38 0.35 -- -- - -- -- ---- ---- 0.35 21.60 0.23 136.38 0.38 0.34 ----- ----- ---- ----- ---- -- ----- 0.34 21.70 0.23 136.38 0.37 0.34 --- ---- ---- ----- ----- ----- ----- 0.34 21.80 0.22 136.37 0.37 0.33 ---- - - - - - - 0.33 21.90 0.22 136.37 0.36 0.33 ---- -- -- --- ---- - -- 0.33 22.00 0.22 136.37 0.36 0.32 -- --- --- ---- -- - --- ---- 0.32 22.10 0.24 136.36 0.35 0.32 -- ----- --- --- -- - --- 0.32 22.20 0.27 136.36 0.35 0.32 --- ----- ----- ---- ----- ----- --- 0.32 22.30 0.26 136.36 0.35 0.31 ----- ---- ----- ----- ---- ----- ---- 0.31 22A0 0.25 136.36 0.34 0.31 ---- - - - - - - 0.31 22.50 0.23 136.35 0.34 0.31 -- --- --_ __- ____ �_ ___ 0.31 22.60 0.22, 136.35 0.33 0.30 ----- -- ---- --- -- -- ---- 0.30 22.70 0.22 136.35 0.33 0.30 ----- ---- -- ---- - ---- ----- 0.30 22.80 0.21 136.35 0.33 0.30 ----- ----- ----- ---- ---- --- ----- 0.30 22.90 0.21 136.34 0.32 0.29 ----- ---- ---- ---- ----- ---- ----- 0.29 23.00 0.21 136.34 0.32 0.29 - - --- - - - - 0.29 23.10 0.21 136.34 0.31 0.29 --- -- ---- --- ---- - -- 0.29 23.20 0.21 136.33 0.31 0.28 --- --- ---- ----- --- --- --- 0.28 23.30 0.20 136.33 0.31 0.28 --- -- ---- ---- -- -- ----- 0.28 23.40 0.20 136.33 0.30 0.27 ---- ---- ---- ---- ---- --- ----- 0.27 23.50 0.20 136.33 0.30 0.27 ----- ---- ----- ----- --- ----- ----- 0.27 23.60 0.20 136.32 0.29 0.27 - - - - - - - 0.27 23.70 0.19 136.32 0.29 0.26 ---- --- ---- ----- --- - -- 0.26 23.80 0.19 136.32 0.29 0.26 ----- ---- --- --- -_ ___ ____ 0.26 23.90 0.19 136.32 0.28 0.26 -- -- -- ---- ---- -- ---- 0.26 24.00 0.19 136.31 0.28 0.26 --- ----- --- ---- ---- ---- ----- 0.26 24.10 0.15 136.31 0.28 0.25 ----- ----- ----- ----- ----- ----- ----- 0.25 24.20 0.09 136.31 0.27 0.25 - - - -- - - - 025 24.30 0.05 136.30 0.26 0.24 --- --- ----- --- - -- --- 0.24 24.40 0.02 136.29 0.25 0.23 --- ----- - ---- ----- --- ----- 0.23 24.50 0.00 136.29 0.24 0.22 ---- --- -- -- ----- --- --- 0.22 24.60 0.00 136.28 0.23 0.21 --- ---- ----- --- --- ----- --- 0.21 24.70 0.00 136.27 0.22 0.20 ----- ----- ----- ----- ---- ----- ----- 0.20 24.80 0.00 136.26 0.21 0.19 ----- - - - - ----- - 0.19 24.90 0.00 136.26 0.20 0.18 --- ---- --- --- ----- - --- 0.18 25.00 0.00 136.25 0.19 0.17 ---- ---- --- - ---- ---- --- 0.17 25.10 0.00 136.24 0.19 0.17 --- -- ---- ---- --- --- --- 0.17 25.20 0.00 136.24 0.18 0.16 ---- __- ----- ___ _-__ ----- -_ 0.16 25.30 0.00 136.23 0.17 0.15 ----- ---- ----- ----- ----- ----- ---- 0.15 25.40 0.00 136.23 0.16 0.15 ---- --- -- ---- ---- ----- --- 0.15 25.50 0.00 136.22 0.16 0.14 --- ____ ___ ___ ____ -__ -__ 0.14 ...End Hydrograph Report Pagel Hydraflow Hydrographs by Intelisolm Hyd. No. 2 Hydrograph type = Reservoir Peak discharge = 0.97 cfs Storm frequency = 25 yrs Time interval = 6 min Inflow hyd. No. = 1 Reservoir name = detention basin Max. Elevation = 137.30 ft Max. Storage = 30,345 cuft Storage Indication method used. Outflow hydrograph volume=36,048 cuft Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D EAI Outflow (hrs) cfs, ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 12.20 11.26 << 136.44 0.43 0.41 -- --- -- ----- -- ---- -- 0.41 12.30 10.68 136.83 0.76 0.72 ----- ___ _- ___ __- -__ ____ 0.72 12.50 6.97 136.46 0.45 0.43 ----- ----- ---_ ____ ___ _____ ----- 0.43 12.60 4.93 136.66 0.63 0.60 - ---- ---- - - - - 0.60 12.70 3.68 136.79 0.73 0.69 - -- - --- --- -- --- 0.69 12.80 2.87 136.88 0.80 0.75 ---- ---- - -- --- --- ----- 0.75 12.90 2.40 136.95 0.82 0.79 ----- --- - -- -- --- --- 0.79 13.00 2.13 137.00 0.82 0.82 -- ---- ----- ----- ----- ----- ---- 0.82 13.10 1.95 137.04 0.85 0.84 ----- ----- ---- ---- ----- ----- ----- 0.84 13.20 1.80 137.07 0.88 0.86 - - --- - - - - 0.86 13.30 1.70 137.10 0.90 0.87 -- -- --- ---- ----- ---- --- 0.87 13.40 1.62 137.13 0.91 0.89 - - --- --- --- -- ---- 0.89 13.50 1.57 137.15 0.91 0.90 ---- -- -- - ----- --- -- 0.90 13.60 1.52 137.17 0.92 0.91 -- ---- --- ----- ----- --- ---- 0.91 13.70 1.47 137.19 0.92 0.92 ---- ---- ----- ----- ----- ----- ----- 0.92 13.80 1.41 137.21 0.93 0.93 - - - - -- - ---- 0.93 13.90 1.36 137.22 0.94 0.93 - - -- -- -- --- -- 0.93 14.00 1.31 137.24 0.95 0.94 --- -- --- -- --- ----- -- 0.94 14.10 1.26 137.25 0.96 0.94 --- -- -- -- ---- ----- ---- 0.94 14.20 1.21 137.26 0.96 0.95 --- --- ---- --- --- --- ----- 0.95 14.30 1.18 137.27 0.97 0.95 --- --- ---- ----- ----- ----- ---- 0.95 14.40 1.15 137.27 0.98 0.96 - - - - - - ---- 0.96 14.50 1.12 137.28 0.98 0.96 - ---- -- ----- --- ---- ---- 0.96 14.60 1.10 137.28 0.98 0.96 --- -- --- ---- ---- ---- --- 0.96 14.70 1.07 137.29 0.99 0.96 -- -- ----- ---- -- - -- 0.96 14.80 1.05 137.29 0.99 0.96 ----- - ---- --- ---- ---- --- 0.96 14.90 1.02 137.29 0.99 0.97 ----- ----- ----- ---- ----- ----- ----- 0.97 15.00 1.00 137.30 0.99 0.97 - - ----- ----- - ----- - 0.97 15.10 0.97 137.30<< 0.99 0.97 -- - ----- --- -- ---- ----- 0.97<< 15.20 0.94 137.30 0.99 0.97 -- - --- --- ---- --- ---- 0.97 15.30 0.92 137.29 0.99 0.97 -- - - - --- -- ----- 0.97 15.40 0.89 137.29 0.99 0.96 -- -- ---- --- ---- ---- --- 0.96 15.50 0.86 137.29 0.99 0.96 ---- ----- ----- ---- ----- ----- ---- 0.96 15.60 0.83 137.29 0.98 0.96 - - - - - - ---- 0.96 15.70 0.81 137.28 0.98 0.96 - - - -- - --- ----- 0.96 15.80 0.78 137.28 0.98 0.96 -- ---- -_ -- -- ---- --- 0.96 15.90 0.75 137.27 0.97 0.95 - - --- ---- ----- ---- ---- 0.95 16.00 0.72 137.26 0.97 0.95 -- --- ----- ----- ----- ----- ----- 0.95 Continues on next page... Page 2 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Ell Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 16.10 0.70 137.25 0.96 0.95 --- -- - --- ---- --- --- 0.95 16.20 0.67 137.25 0.95 0.94 ----- ----- --- --- -- ----- --- 0.94 16.30 0.66 137.24 0.95 0.94 ----- ----- ----- ---- ----- ----- ---- 0.94 16.40 0.64 137.23 0.94 0.93 ----- - - - - - - 0.93 16.50 0.63 137.22 0.93 0.93 - - - - - - --- 0.93 16.60 0.62 137.21 0.93 0.92 ---- --- -- --- --- --- ---- 0.92 16.70 0.60 137.20 0.92 0.92 - - --- -- -- -- ---- 0.92 16.80 0.59 137.19 0.92 0.91 ----- --- ---- ---- ----- ---- ---- 0.91 16.90 0.58 137.17 0.92 0.91 ----- ---- ----- ----- ----- ----- ----- 0.91 17.00 0.57 137.16 0.92 0.90 --- - -- ---- ---- - - - 0.90 17.10 0.56 137.15 0.91 0.90 - -- ----- - - ----- - 0.90 17.20 0.54 137.14 0.91 0.89 ---- -- ---- --- -- ----- --- 0.89 17.30 0.53 137.13 0.91 0.89 -- - --- --- --- -- --- 0.89 17.40 0.52 137.12 0.91 0.88 ---- --- ---- --- - --- ---- 0.88 17.50 0.51 137.11 0.91 0.87 ----- ----- ---- ----- --- ----- ---- 0.87 17.60 0.49 137.09 0.90 0.87 - - - - - - - 0.87 17.70 0.48 137.08 0.89 0.86 --- - -- -- - -- -- 0.86 17.80 0.47 137.07 0.88 0.85 ---- -- - -- ---- -- -- 0.85 17.90 0.46 137.06 0.87 0.85 ---- -- ----- - -- --- --- 0.85 18.00 0.44 137.04 0.85 0.84 --- --- --- ---- -- ----- ----- 0.84 18.10 0.43 137.03 0.84 0.83 --- ----- --- ---- ---- ---- ----- 0.83 18.20 0.42 137.02 0.83 0.83 - - - - - - - 0.83 18.30 0.42 137.00 0.82 0.82 -- - ----- --- --- -- -- 0.82 18.40 0.41 136.99 0.82 0.81 -- __- ___ ___ _- ____ ___ 0.81 18.50 0.41 136.97 0.82 0.80 ----- -- -_ -_ -_ ___ -_ 0.80 18.60 0.40 136.96 0.82 0.80 ---- --- -- -- --- ---- ---- 0.80 18.70 0.40 136.95 0.82 0.79 ----- ----- --- ----- ----- ---- ----- 0.79 18.80 0.40 136.93 0.82 0.78 - - - - -- --- - 0.78 18.90 0.39 136.92 0.82 0.77 --- --- --- ----- ---__ -- - 0.77 19.00 0.39 136.90 0.82 0.76 -- -- - -- -__ _-_ ___ 0.76 19.10 0.38 136.89 0.81 0.76 ----- -- ----- ---- ____ -__ ___ 0.76 19.20 0.38 136.88 0.80 0.75 ---- ---- --- ----- --- ---- ---- 0.75 19.30 0.38 136.86 0.79 0.74 ---- ---- ---- ---- ---- ----- ----- 0.74 19.40 0.37 136.85 0.78 0.73 - - - - - - - 0.73 19.50 0.37 136.84 0.77 0.72 ---- -- --- -- --- --- -- 0.72 19.60 0.37 136.83 0.76 0.72 ----- -__ _-_ _- ___ -_ _____ 0_72 19.70 0.36 136.81 0.75 0.71 --- ---- - - --_ -_ -_ ___ 0.71 19.80 0.36 136.80 0.74 0.70 ---- --- ---- --- ---- --- --- 0.70 19.90 0.35 136.79 0.73 0.69 ----- ----- ---- ----- ----- ----- --- 0.69 20.00 0.35 136.78 0.72 0.69 - - ----- ---- - - - 0.69 20.10 0.35 136.76 0.71 0.68 -- -- - - -- --- -- -- 0.68 20.20 0.34 136.75 0.70 0.67 ---- ---- ----- --- -- -- ---- 0.67 20.30 0.34 136.74 0.69 0.66 -- -- --- -- -- -- --- 0.66 20.40 0.34 136.73 0.68 0.65 --- --- ---- -- ----- --- --- 0.65 20.50 0.33 136.72 0.67 0.65 ----- ----- ----- ----- ----- ----- ---- 0.65 20.60 0.33 136.71 0.67 0.64 - - - - - - --- 0.64 20.70 0.32 136.70 0.66 0.63 - ----- - - - -- -- 0.63 20.80 0.32 136.68 0.65 0.62 -- --- -- -- ----- -- --- 0.62 20.90 0.32 136.67 0.64 0.61 --- -- - ---- -- - --- 0.61 21.00 0.31 136.66 0.63 0.61 --- ---- --- --- ----- --- --- 0.61 21.10 0.31 136.65 0.63 0.60 ----- ----- ---- --- ----- ----- ---- 0.60 Continues on next page... Page 3 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Ell Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 21.20 0.31 136.64 0.62 0.59 - ----- - - -- -- --- 0.59 21.30 0.30 136.63 0.61 0.58 0.58 21.40 0.30 136.62 0.61 0.58 ---- ----- ---- ----- ---- ----- ---- 0.58 21.50 0.29 136.61 0.60 0.57 - - - - - - - 0.57 21.60 0.29 136.60 0.59 0.56 - - - - - - - 0.56 21.70 0.29 136.59 0.58 0.55 ---- -- ---- ---- --- -- - 0.55 21.80 0.28 136.58 0.57 0.55 -- - -- - ----- ----- -- 0.55 21.90 0.28 136.57 0.56 0.54 ---- ---- --- ---- ---- ---- ----- 0.54 22.00 0.27 136.57 0.55 0.53 ---- ----- ----- ----- ----- ----- ----- 0.53 22.10 0.31 136.56 0.54 0.52 - - -- - - - - 0.52 22.20 0.34 136.55 0.53 0.52 - - ---- - -- - - 0.52 22.30 0.33 136.54 0.52 0.51 -- ----- --- - ____ ____ ___ 0.51 22.40 0.31 136.54 0.52 0.50 -- -- - - -- - ---- 0.50 22.50 0.29 136.53 0.51 0.50 ---- ---- --- -- ---- --- ----- 0.50 22.60 0.28 136.52 0.50 0.49 ---- ----- ----- ----- ---- ---- ----- 0.49 22.70 0.27 136.51 0.49 0.49 - - ---- --- - - ---- 0.49 22.80 0.27 136.51 0.48 0.48 - - ----- ----- - --- -- 0.48 22.90 0.27 136.50 0.47 0.47 -_ -- -- -- -- ---- ---- 0.47 23.00 0.26 136.49 0.47 0.46 - - - - -- --- --- 0.46 23.10 0.26 136.48 0.46 0.46 ---- -- ---- ---- --- ----- --- 0.46 23.20 0.26 136.48 0.46 0.45 ---- ----- ----- ----- ---- ----- ---- 0.45 23.30 0.26 136.47 0.45 0.44 - - ----- - - - ----- 0.44 23.40 0.25 136.46 0.45 0.44 -- --- -- --- ---- - -- --- 0.44 23.50 0.25 136.46 0.44 0.43 ----- -- ---- ---- -- ---- -- 0.43 23.60 0.25 136.45 0.44 0.42 -- _-__ ___ - ___ ___ ___ 0.42 23.70 0.24 136.45 0.43 0.41 ---- ---- -- --- --- --- -- 0.41 23.80 0.24 136.44 0.43 0.41 ----- ----- ----- ----- ----- ----- ----- 0.41 23.90 0.24 136.43 0.43 0.40 - - - - - - - 0.40 24.00 0.23 136.43 0.42 0.40 --- - ---- -- -- -- - 0.40 24.10 0.19 136.42 0.42 0.39 --- --- - ---- --- ---- --- 0.39 24.20 0.12 136.41 0.41 0.38 -- ----- --- - --- -- -- 0.38 24.30 0.06 136.40 0.41 0.37 ----- -- ---- -- ---- ----- ----- 0.37 24.40 0.02 136.39 0.39 0.35 ----- --- - ----- ----- ----- ---- ----- 0.35 24.50 0.00 136.38 0.37 0.34 - - - - - - - 0.34 24.60 0.00 136.37 0.36 0.32 ---- -- -- -- - --- - 0.32 24.70 0.00 136.36 0.34 0.31 ---- --- --- ---- -- -- -- 0.31 24.80 0.00 136.34 0.32 0.29 - -- _-_ ___ -_ ____ _ _ 0.29 24.90 0.00 136.33 0.31 0.28 ----- ---- ---- -- --- ----- --- 0.28 25.00 0.00 136.32 0.29 0.27 ----- ---- ----- ----- ----- ----- ----- 0.27 25.10 0.00 136.32 0.28 0.26 - - - - - - - 0.26 25.20 0.00 136.31 0.27 0.24 --- - --- ----- - -- - 0.24 25.30 0.00 136.30 0.26 0.23 --- -- -- ---- --- --- -- 0.23 25.40 0.00 136.29 0.25 0.22 - -- --- -- -- --- --- 0.22 25.50 0.00 136.28 0.23 0.21 --- -- -- ---- --- --- ---- 0.21 25.60 0.00 136.27 0.22 0.20 ----- ---- --- ----- ---- ----- ----- 0.20 25.70 0.00 136.27 0.22 0.20 - - - - - - - 0.20 ...End Hydrograph Report Pagel f+Araflow"rographs by Intelisolve Hyd. No. 2 Hydrograph type = Reservoir Peak discharge = 1.23 cfs Storm frequency = 50 yrs Time interval = 6 min Inflow hyd. No. = 1 Reservoir name = detention basin Max. Elevation = 137.94 ft Max. Storage = 37,336 cuft Storage Indication method used. Outflow hydrograph volume=48,657 cult Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Civ D Wr A Wr B Wr C Wr D EAU Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 12.10 11.85 136.38 0.38 0.35 -- -- -- - - -- - 0.35 12.20 14.09<< 136.85 0.78 0.73 --- -- -- -- --- ---- ---- 0.73 12.30 13.24 136.33 0.30 0.27 ----- ---- --- ----- ----- ---- - -- 0.27 12.40 11.29 136.75 0.70 0.67 - - - - - - - 0.67 12.50 8.50 137.07 0.88 0.86 --- - --- --- --- - ---- -- 0.86 12.60 5.98 137.28 0.98 0.96 - -- --- -- ---- --- -- 0.96 12.70 4.45 137.42 1.03 1.02 ---- -- -- -- -- --- ---- 1.02 12.80 3.47 137.52 1.09 1.07 -__ _____ -_ ____ -_ -__ _____ 1.07 12.90 2.89 137.59 1.10 1.09 ---- ---- --- ---- ---- ----- ----- 1.09 13.00 2.57 137.64 1.14 1.12 - - - - - - - 1.12 13.10 2.35 137.69 1.18 1.13 ---- - -- - --- --- - 1.13 13.20 2.17 137.73 1.19 1.15 ----- -- ---- --- -- --- -- 1.15 13.30 2.04 137.76 1.19 1.16 --- -- - -- ----- --- ----- 1.16 13.40 1.95 137.78 1.19 1.17 --- -- ____ ____ ___ ____ ____ 1.17 13.50 1.88 137.81 1.19 1.18 ----- --- -- ----- ---- ----- ----- 1.18 13.60 1.82 137.83 1.20 1.19 - - ----- - - - - 1.19 13.70 1.76 137.85 1.20 1.20 - - --- - - -- ---- 1.20 13.80 1.70 137.87 1.21 1.20 --- ---- --- -- --- ----- --- 1.20 13.90 1.63 137.88 1.21 1.21 ----- --- - - - -- ---- 1.21 14.00 1.57 137.90 1.21 1.21 ---- --- --- - ---- ---- --- 1.21 14.10 1.51 137.91 1.22 1.22 ---- - -- -- ---- ----- ----- ----- 1.22 14.20 1.45 137.91 1.23 1.22 - - - - - ----- - 1.22 14.30 1.41 137.92 123 1.22 - -- -- ----- --- -- - -- 1.22 14.40 1.37 137.93 1.24 1.22 -- --- --- -- -- ----- -- 1.22 14.50 1.34 137.93 1.24 1.23 - -- ----- --- ---- -- -- 1.23 14.60 1.31 137.94 1.24 1.23 --- ----- --- ___ ___ ___ _____ 1.23 14.70 1.28 137.94 1.24 1.23 --- ---- ----- ----- ----- ---- ----- 1.23 14.80 1.25 137.94 1.24 1.23 - - - - --- - - 1.23 14.90 1.22 137.94 << 1.24 1.23 ---- ----- ----- _- - ----- ---- 1.23<< 15.00 1.19 137.94 1.24 1.23 - - --- -- ---- --- ---- 1.23 15.10 1.15 137.94 1.24 1.23 -- - - ----- ----- - --- 1.23 15.20 1.12 137.93 1.24 1.23 --- --- ---- - - --- ----- 1.23 15.30 1.09 137.93 1.24 1.22 --- ---- ----- ---- ----- ----- ----- 1.22 15.40 1.06 137.92 1.23 1.22 - - - - - - - 1.22 15.50 1.03 137.92 1.23 1.22 -- - - --- - - =-- 1.22 15.60 0.99 137.91 1.22 1.22 - -- - --- -- -- -- 1.22 15.70 0.96 137.90 1.22 1.22 - --- --- ----- -- --- ----- 1.22 15.80 0.93 137.89 1.21 1.21 ---- ---- ----- ----- --- ----- --- 1.21 Continues on next page... Page 2 Hydrograph Discharge Table Time Inflow Elevation Clv A Civ B CIv C Clv D Wr A Wr B Wr C Wr D EAU Outflow (hrs) ds ft cfs cfs cfs cfs cfs cfs efs cfs cfs cfs 15.90 0.89 137.88 1.21 1.21 -- -- -- ---- -- -- ---- 1.21 16.00 0.86 137.87 1.21 1.20 ---- ----- ---- ----- ----- ---- ---- 1.20 16.10 0.83 137.86 1.20 1.20 ----- ----- ----- ----- ----- ----- ---- 1.20 16.20 0.80 137.85 1.20 1.20 ----- - ---- ---- - - - 1.20 16.30 0.78 137.84 1.20 1.19 - - -- ---- -- --- ---- 1.19 16.40 0.76 137.82 1.19 1.19 -- --- ---- --- ---- -- ---- 1.19 16.50 0.75 137.81 1.19 1.18 - - - ----- - --- --- 1.18 16.60 0.73 137.79 1.19 1.17 ----- ---- -- --- ----- ----- ---- 1.17 16.70 0.72 137.78 1.19 1.17 ---- ---- ---- ----- ----- ----- --- 1.17 16.80 0.70 137.76 1.19 1.16 - --- --- - - - - 1.16 16.90 0.69 137.75 1.19 1.16 - -- - -- - -- -- 1.16 17.00 0.67 137.73 1.19 1.15 --- - - -- -- -- --- - 1.15 17.10 0.66 137.72 1.19 1.14 -- -- ___ ____ _____ -__ ____ 1.14 17.20 0.64 137.70 1.19 1.14 ---- --- --- --- -- --- ----- 1.14 17.30 0.63 137.68 1.17 1.13 ----- ----- ----- ---- ---- ---- ---- 1.13 17.40 0.62 137.67 1.16 1.13 - - - - - - - 1.13 17.50 0.60 137.65 1.14 1.12 --- ----- -- ---- ---- -- ---- 1.12 17.60 0.59 137.63 1.13 1.11 --- ---- ---- ---- -- - ---- 1.11 17.70 0.57 137.62 1.11 1.10 --- --- -- --- -- -- ---- 1.10 17.80 0.56 137.60 1.10 1.10 -- --- ---- ----- --- ---- ---- 1.10 17.90 0.54 137.58 1.10 1.09 ----- ---- ----- ----- ----- ----- ---- 1.09 18.00 0.53 137.56 1.09 1.08 - - - - - - ----- 1.08 18.10 0.51 137.54 1.09 1.07 --- - --- -- -- ---- --- 1.07 18.20 0.50 137.52 1.09 1.07 ---- ----- ---- ----- -- ----- ---- 1.07 18.30 0.49 137.51 1.09 1.06 -- --- ----- ---- ----- --- ----- 1.06 18.40 0.49 137.49 1.08 1.05 -- ---- ----- --- --- --- ----- 1.05 18.50 0.48 137.47 1.06 1.04 ----- ----- --- ---- ---- ----- ----- 1.04 18.60 0.48 137.45 1.05 1.03 - - - - - - - 1.03 18.70 0.47 137.43 1.04 1.03 ---- ----- -- --- ---- --- ---- 1.03 18.80 0.47 137.41 1.02 1.02 --- ----- -- --- -- -- -- 1.02 18.90 0.46 137.39 1.01 1.01 - --- ----- --- - ---- ---- 1.01 19.00 0.46 137.38 1.01 1.00 -- ---- --- ----- ----- ----- ---- 1.00 19.10 0.46 137.36 1.01 0.99 ---- ---- ----- --- ---- --- ----- 0.99 19.20 0.45 137.34 1.00 0.99 - - - - - - - 0.99 19.30 0.45 137.32 1.00 0.98 --- --- --- -- ---- - ---- 0.98 19.40 0.44 137.31 1.00 0.97 ----- -__ ____ ___ -__ _____ ___ 0.97 19.50 0.44 137.29 0.99 0.96 -- ---- --- -- -- ---- ----- 0.96 19.60 0.43 137.27 0.97 0.95 ---- ---- ---- ---- --- ---- --- 0.95 19.70 0.43 137.25 0.96 0.95 ---- ----- ----- ----- ----- ---- ----- 0.95 19.80 0.42 137.24 0.95 0.94 - - - - - - - 0.94 19.90 0.42 137.22 0.94 0.93 --- --- ---- ---- --- - --- 0.93 20.00 0.42 137.20 . 0.92 0.92 ---- -__ _- _____ ____ __- _- 0.92 20.10 0.41 137.19 0.92 0.91 - -- - - - -- -- 0.91 20.20 0.41 137.17 0.92 0.91 --- ____ -_ ___ _- -__ ___ 0.91 20.30 0.40 137.15 0.91 0.90 ----- ---- ---- ---- ----- ---- ----- 0.90 20.40 0.40 137.14 0.91 0.89 - - - - - - ----- 0.89 20.50 0.39 137.12 0.91 0.88 -- --- ---- -- - -- --- 0.88 20.60 0.39 137.10 0.90 0.87 --- --- -- - -- - ----- 0.87 20.70 0.38 137.09 0.89 0.86 ---- _- ----- --- - ----- ---- 0.86 20.80 0.38 137.07 0.88 0.86 ---- -- --- -- ----- - ---- 0.86 20.90 0.37 137.06 0.87 0.85 ---- --- ----- ---- ----- ---- -- 0.85 Continues on next page... Page 3 Hydrograph Discharge Table Time Inflow Elevation CIv A CIv B CIv C CIv D Wr A Wr B Wr C Wr D EAU Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 21.00 0.37 137.04 0.85 0.84 ---- -- -- - -- - - 0.84 21.10 0.37 137.02 0.84 0.83 =-- --- ---- ----- ---- ---- --- 0.83 21.20 0.36 137.01 0.83 0.82 ---- ----- ----- ----- ----- ---- ---- 0.82 21.30 0.36 136.99 0.82 0.82 - - - - - - - 0.82 21.40 0.35 136.98 0.82 0.81 - - - -- - - --- 0.81 21.50 0.35 136.96 0.82 0.80 - ---- --- --- -- -- --- 0.80 21.60 0.34 136.95 0.82 0.79 ----- -- -- ____ ____ __- _- 0.79 21.70 0.34 136.93 0.82 0.78 ---- ---- --- - --- --- -- ---- 0.78 21.80 0.33 136.91 0.82 0.77 ---- ----- ----- ----- ----- ----- ----- 0.77 21.90 0.33 136.90 0.82 0.76 - - - - - - - 0.76 22.00 0.32 136.88 0.80 0.75 - - - --- ---- - - 0.75 22.10 0.36 136.87 0.79 0.74 -- ---- --- --- --- -- --- 0.74 22.20 0.41 136.86 0.78 0.73 --- -- -- ----- ____ -_ _____ 0.73 22.30 0.39 136.84 0.77 0.73 ---- --- --- -- ---- ---- --- 0.73 22.40 0.37 136.83 0.76 0.72 ---- ----- -- ----- ----- ---- ---- 0.72 22.50 0.35 136.82 0.75 0.71 - ----- - - - ---- ----- 0.71 22.60 0.33 136.80 0.74 0.70 ---- -- - - - -- --- 0.70 22.70 0.32 136.79 0.73 0.70 -- ---- --- --- --- ---- ---- 0.70 22.80 0.32 136.78 0.72 0.69 -- ---- --- -- - ----- -- 0.69 22.90 0.32 136.76 0.71 0.68 --- --- ____ ____ ____ ____ ____ 0.68 23.00 0.31 136.75 0.70 0.67 ----- ----- ----- ----- ---- ----- ----- 0.67 23.10 0.31 136.74 0.69 0.66 - - - - - - - 0.66 23.20 0.30 136.73 0.68 0.65 -- -- -- --- --- - - 0.65 23.30 0.30 136.71 0.67 0.64 -- -- --- ---- -- --- -- 0.64 23.40 0.30 136.70 0.66 0.64 ---- --- -- -- ----- -- ---- 0.64 23.50 0.29 136.69 0.65 0.63 -___ ____ ___ _-_ -_ __- ___ 0.63 23.60 0.29 136.68 0.65 0.62 ---- ----- --- ----- ----- ----- ----- 0.62 23.70 0.29 136.67 0.64 0.61 --- - - - --- - ----- 0.61 23.80 0.28 136.66 0.63 0.60 -- -- ----- -- -- --- -- -- 0.60 23.90 0.28 136.64 0.62 0.59 --- --- --- ---- --- --- ---- 0.59 24.00 0.28 136.63 0.61 0.58 - -- - --- -- ----- --- 0.58 24.10 0.23 136.62 0.60 0.57 --- ----- ---- ----- ---- --- ---- 0.57 24.20 0.14 136.61 0.59 0.56 ----- ----- ---- ---- ---- ----- ---- 0.56 24.30 0.07 136.59 0.58 0.55 - - ----- -- - - - 0.55 24.40 0.02 136.57 0.56 0.54 - - ----- _- - -- -- - 0.54 24.50 0.00 136.55 0.54 0.52 -- -- -- --- --- ---- -- 0.52 24.60 0.00 136.54 0.51 0.50 ---- ----- -- --- ----- - ---- 0.50 24.70 0.00 136.52 0.49 0.49 ----- --- --- ---- ---- ---- --- 0.49 24.80 0.00 136.50 0.47 0.47 ---- ---- ---- ----- ----- ----- -- 0.47 24.90 0.00 136.48 0.46 0.46 - - - - - - - 0.46 25.00 0.00 136.47 0.45 0.44 -- ---- ----- - --- ---- ----- Q.44 25.10 0.00 136.45 0.44 0.42 -- ----- ---- -- -- --- --- 0.42 25.20 0.00 136.44 0.43 0.41 ----- --- - -- -- ---- --- 0.41 25.30 0.00 136.42 0.42 0.39 -- --- ----- -- ----- ---- --- 0.39 25.40 0.00 136.41 0.41 0.38 ---- ---- --- --- --- ---- ----- 0.38 25.50 0.00 136.40 0.40 0.36 ----- - ----- - - - ---_ 0.36 25.60 0.00 136.38 0.38 0.35 ----- -- --- - - --- -- 0.35 25.70 0.00 136.37 0.36 0.33 ----- ----- --- -- -- -- ----- 0.33 25.80 0.00 136.36 0.35 0.31 -- --- -- -- ----- - ---- 0.31 25.90 0.00 136.35 0.33 0.30 ---- -- -- -- --- --- ---- 0.30 26.00 0.00 136.34 0.31 0.29 --- ----- ---- ----- ----- ----- ----- 0.29 Continues on next page... Page 4 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Ell Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 26.10 0.00 136.33 0.30 0.27 — ----- -- -- ---- --- --- 0.27 26.20 0.00 136.32 0.29 0.26 --- --- -- --- ---- ----- --- 0.26 26.30 0.00 136.31 0.27 0.25 ----- ----- ----- ----- ----- ----- ----- 0.25 ...End Hydrograph Report Pagel Hydraflow HydrogWhs by Intelisolve Hyd. No. 2 Hydrograph type = Reservoir Peak discharge = 1.45 cfs Storm frequency = 100 yrs Time interval = 6 min Inflow hyd. No. = 1 Reservoir name = detention basin Max. Elevation = 138.61 ft Max. Storage = 45,339 cuft Storage Indication method used. Outflow hydrograph volume=61,788 cult Hydrograph Discharge Table Time Inflow Elevation CIv A Clv B Civ C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs , ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 12.10 14.45 136.73 0.69 0.66 - --- ----- ----- ----- -- ---- 0.66 12.30 15.88 136.87 0.79 0.74 ---- -- -- ---- -- -- - 0.74 12.40 13.46 137.33 1.00 0.98 -- ----- --- --- -- ----- - - 0.98 12.50 10.08 137.69 1.18 1.13 - - - - - - - 1.13 12.60 7.06 137.93 1.24 1.23 - ---- - - - - - 1.23 12.70 5.24 138.09 1.29 1.28 -- --- --- -- -- - -- 1.28 12.80 4.07 138.18 1.38 1.31 --- ---- -- --- - --- ---- 1.31 12.90 3.40 138.26 1.40 1.34 --- ---- ---- --- -- --- -- 1.34 13.00 3.01 138.31 1.40 1.36 ----- ----- ----- --- ----- ---- ----- 1.36 13.10 2.75 138.36 1.40 1.37 - - - - - - ---- 1.37 13.20 2.54 138.39 1.40 1.38 - --- ----- - - ---- - 1.38 13.30 2.38 138.43 1.42 1.39 -- -- --- ---- - --- --- 1.39 13.40 2.28 138.45 1.45 1.40 -- --- -- -- -- - --- 1.40 13.50 2.20 138.48 1.48 1.41 --- ----- ---- -- ----- --- ---- 1.41 13.60 2.13 138.50 1.50 1.42 ----- ----- ----- --- --- ---- ----- 1.42 13.70 2.05 138.52 1.50 1.42 - - - - - - - 1.42 13.80 1.98 138.54 1.50 1.43 - - -- -- -- -- -- 1.43 13.90 1.90 138.55 1.50 1.43 -- ----- --- --- -- - ---- 1.43 14.00 1.83 138.57 1.50 1.44 -- - --- ---- -- -__ __w 1.44 14.10 1.76 138.58 1.50 1.44 ---- --- --- -- -- _- _- 1.44 14.20 1.69 138.58 1.50 1.44 - ----- ----- ----- ----- --- ----- 1.44 14.30 1.64 138.59 1.50 1.45 - - - - - - - 1.45 14.40 1.60 138.60 1.50 1.45 -- --- -- --- -- --- ---- 1.45 14.50 1.56 138.60 1.50 1.45 ----- ----- --- --- --- --- -- 1.45 14.60 1.53 138.60 1.50 1.45 --- --- -- ----- -_- -- ---- 1.45 14.70 1.49 138.61 1.50 1.45 -- --- --- -- -- --- --- 1.45 14.80 1.45 138.61 << 1.50 1.45 -- ---- ---- _---- ---- ---- ---- 1.45<< 14.90 1.42 138.61 1.50 1.45 - - _---- - - - - 1.45 15.00 1.38 138.60 1.50 1.45 -- - ---- ---- - - - 1.45 15.10 1.34 138.60 1.50 1.45 -- ---- --- -- -- --- _- 1.45 15.20 1.31 138.60 1.50 1.45 1.45 15.30 1.27 138.59 1.50 1.45 - --- - -- -- -_ ____ 1.45 15.40 1.23 138.59 1.50 1.44 ----- ----- ____ ____ ____ ____ ___ 1.4.4 15.50 1.19 138.58 1.50 1.44 - - - - _____ ____ - 144. 15.60 1.15 138.57 1.50 1.44 -- - ____ -_ -__ ____ 1.44 15.70 1,11 138.56 1.50 1.44 -- --_ _____ - - ____ _____ 1.44 15.80 1.08 138.55 1.50 1.43 - ----_ - __- ____ _____ __- 1.43 15.90 1.04 138.54 1.50 1.43 ----- ---- -- -__- ----- ----- -__ 1.43 Continues on next page... Page 2 Hydrograph Discharge Table Time Inflow Elevation Civ A Clv B Clv C CIv D Wr A Wr B Wr C Wr D EAU Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 16.00 1.00 138.53 1.50 1.43 -- -- --- -- ---- -- -- 1.43 16.10 0.96 138.52 1.50 1.42 -- ---- ----- ----- ---- ---- ---- 1.42 16.20 0.93 138.50 1.50 1.42 ----- ----- --- ----- ----- ----- --- 1.42 16.30 0.90 138.49 1.48 1.41 - - - - - - - 1.41 16.40 0.88 138.47 1.47 1.41 - - --- - -- - - 1.41 16.50 0.87 138.46 1.45 1.40 - ---- --- --- ---- -- -- 1.40 16.60 0.85 138.44 1.44 1.40 - --- --- ----- -- --- --- 1.40 16.70 0.83 138.42 1.42 1.39 ----- --- -- ___ ____ -_ __-__ 1.39 16.80 0.82 138.41 1.40 1.39 ---- ----- ---- ----- ----- ---- ---- 1.39 16.90 0.80 138.39 1.40 1.38 - - - - - - - 1.38 17.00 0.78 138.37 1.40 1.38 - - -- - - - --- 1.38 17.10 0.76 138.35 1.40 1.37 -- -- --- --- --- --- -- 1.37 17.20 0.75 138.34 1.40 1.36 -- -- -- -- --- - ----- 1.36 17.30 0.73 138.32 1 A0 1.36 --- --- -- ---- ---- ---- ---- 1.36 17.40 0.71 138.30 1.40 1.35 ----- ----- ----- ----- ----- ----- ---- 1.35 17.50 0.70 138.28 1.40 1.35 - - - - - - - 1.35 17.60 0.68 138.26 1.40 1.34 ---- - -- - --- - -- 1.34 17.70 0.66 138.24 1.40 1.33 -- ---- -- --- --- ---- ----- 1.33 17.80 0.64 138.22 1.40 1.33 ----- --- -- -- --- ---- -- 1.33 17.90 0.63 138.20 1.40 1.32 -- --- --- ---- --- ---- --- 1.32 18.00 0.61 138.18 1.37 1.31 ----- ----- ---- ----- ---- ----- ----- 1.31 18.10 0.59 138.16 1.35 1.31 - - - - - ----- - 1.31 18.20 0.58 138.14 1.33 1.30 - --- --- --- --- ---- ---- 1.30 18.30 0.57 138.11 1.31 1.29 ---- ---- -- _-_ ___ -__ ___ 1.29 18.40 0.56 138.09 1.29 1.28 ----- -- -- __- - ---- ---- 1.28 18.50 0.56 138.07 1.29 1.28 ----- ----- ---- -_ -_- -- ----- 1.28 18.60 0.55 138.05 1.29 1.27 ---- ---- ---- ---- ---- ---- ---- 1.27 18.70 0.55 138.03 1.29 1.26 - - ---- - - - - 1.26 18.80 0.54 138.01 1.29 1.25 - -- -- --- ----- --- - - 1.25 18.90 0.54 137.99 1.28 1.25 ---- ---- -- --- ---- --- --- 1.25 19.00 0.53 137.96 1.26 1.24 --- --- --- --- -- --- -- 1.24 19.10 0.53 137.94 1.24 1.23 -- ---- --- -- ----- ----- --- 1.23 19.20 0.52 137.92 1.23 1.22 ----- --- --- ---- ----- ----- ----- 1.22 19.30 0.52 137.89 1.21 1.21 - - - - - - - 1.21 19.40 0.51 137.87 1.21 1.20 - - -- ---- ---- --- -- 1.20 19.50 0.51 137.85 1.20 1.19 -- - ---- -- ---- --- --- 1.19 19.60 0.50 137.82 1.19 1.19 ----- --- -- --_ ____ _____ _____ 119 19.70 0.50 137.80 1.19 1.18 -- ---- -- ----- ---- ---- ---- 1.18 19.80 0.49 137.78 1.19 1.17 ----- ----- ---- ---- ---- ---- ----- 1.17 19.90 0.49 137.76 1.19 1.16 - - - - - - - 1.16 20.00 0.48 137.73 1.19 1.15 - - ----- -- -- -- ---- 1.15 20.10 0.47 137.71 1.19 1.14 ----- -- --- -- ---- ---- ---- 1.14 20.20 0.47 137.69 1.18 1.13 --- --- ---- ---- ---- ---- -- 1.13 20.30 0.46 137.67 1.16 1.13 ---- --- ---- ____ ___ -_ - 1.13 20.40 0.46 137.65 1.14 1.12 ----- ----- ---- ---- ---- ---- --- 1.12 20.50 0.45 137.62 1.12 1.11 ----- - - - - - - 1.11 20.60 0.45 137.60 1.10 1.10 ---- - --- - - - -_--- 1.10 20.70 0.44 137.58 1.10 1.09 --- -_- ---- ---- - --- --- 1.09 20.80 0.44 137.56 1.09 1.08 - - --- - --_ --- --- 1.08 20.90 0.43 137.54 1.09 1.07 -- ---- -- --- ----- ---- ---- 1.07 21.00 0.43 137.52 1.09 1.06 ----- ---- ----- -- ---- ----- ----- 1.06 Continues on next page... Page 3 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D EMI Outflow (hrs) _ dfs ft cfs cfs cfs ds cfs cfs cfs cfs cfs cfs 21.10 0.42 137.50 1.09 1.06 ---- -- ----- -- - --- ---- - - 1.06 21.20 0.42 137.48 1.07 1.05 --- ----- ----- --- ---- -- ----- 1.05 21.30 0.41 137.45 1.05 1.04 ----- --- ---- ----- ----- ----- ---- 1.04 21.40 0.41 137.43 1.04 1.03 - - ---- - - - - 1.03 21.50 0.40 137.41 1.02 1.02 - - -- - -- -- -- - 1.02 21.60 0.40 137.39 1.01 1.01 ----- -___ _- -_ -__ -_- ___- 1.01 21.70 0.39 137.37 1.01 1.00 - --- -- - - ---- ---- 1.00 21.80 0.39 137.35 1.00 0.99 -- --- --- - - - -- -- 0.99 21.90 0.38 137.33 1.00 0.98 ---- ----- ---- ----- ---- ----- ----- 0.98 22.00 0.37 137.31 1.00 0.97 - -- -- - - - - - 0.97 22.10 0.42 137.29 0.99 0.97 - -- ---- - -- - -- 0.97 22.20 0.47 137.28 0.98 0.96 ---- ----- --- -- --- -- --- 0.96 22.30 0.45 137.26 0.97 0.95 - --- -- --- --- -- ----- 0.95 22.40 0.43 137.24 0.95 0.94 ---- ___ -_ -_ _-_ -_ _-_ 0.94 22.50 0.40 137.23 0.94 0.93 -_- ---- ---- - ----- ---- ---- 0.93 22.60 0.38 137.21 0.93 0.93 - - - - - ----- - 0.93 22.70 0.37 137.19 0.92 0.92 - - - - -- -- --- 0.92 22.80 0.37 137.17 0.92 0.91 -- --- --- -- _-- _- -- 0.91 22.90 0.36 137.15 0.91 0.90 ---- - -- -- - -- --- 0.90 23.00 0.36 137.14 0.91 0.89 - --- ---- --- ---- ----- --- 0.89 23.10 0.36 137.12 0.91 0.88 ----- ---- --- --- ----- --- ----- 0.88 23.20 0.35 137.10 0.90 0.87 - - - - ----- - - 0.87 23.30 0.35 137.08 0.89 0.86 --- -- --- - --- ---- -- 0.86 23.40 0.34 137.07 0.88 0.85 --- --- ---- --- --- --- -- 0.85 23.50 0.34 137.05 0.86 0.85 ---- ____ ____ _____ _____ ____ ____ 0.85 23.60 0.34 137.03 0.85 0.84 --- --- -- ---- - -- - -- 0_84 23.70 0.33 137.02 0.83 0.83 --- ---- --- -- ---- ----- ----- 0.83 23.80 0.33 137.00 0.82 0.82 - - - - - - - 0.82 23.90 0.32 136.98 0.82 0.81 - -- ----- - ---- -- ---- 0.81 24.00 0.32 136.97 0.82 0.80 -- --- --- ---- -- ----- ---- 0.80 24.10 0.26 136.95 0.82 0.79 ---- -- -- ----- _-_ _____ ____ 0.79 24.20 0.16 136.93 0.82 0.78 ----- ---- -- --- --- ---- -- 0.78 24.30 0.08 136.90 0.82 0.76 ----- --- -- ----- ----- ----- ---- 0.76 24.40 0.03 136.88 0.80 0.75 - - - - - - ----- 0.75 24.50 0.00 136.85 0.78 0.73 -- -- - -- -- -- -- 0.73 24.60 0.00 136.83 0.76 0.72 --- --- -- -- -- --_ -- 0.72 24.70 0.00 136.80 0.74 0.70 - --- -- -- --- --- -- 0.70 24.80 0.00 136.78 0.72 0.69 ---- --- -- --_ --- -- --- 0.69 24.90 0.00 136.75 0.70 0.67 ----- ----- ---- ---- ---- ---- ---- 0.67 25.00 0.00 136.73 0.68 0.65 - - - - --- - - 0.65 25.10 0.00 136.71 0.67 0.64 -- ----- ---- - -- -- ___ - 0.64 25.20 0.00 136.68 0.65 0.62 ---- -- - -- -- -- --- 0.62 25.30 0.00 136.66 0.63 0.60 ---- ---- - ----- -- ---- -- 0.60 25.40 0.00 136.64 0.62 0.59 --- -- -- - --- -- ---- 0.59 25.50 0.00 136.62 0.60 0.57 ----- ----- ---- ----- ---- ---- ---- 0.57 25.60 0.00 136.60 0.59 0.56 - - - - - _____ - 0.56 25.70 0.00 136.58 0.56 0.54 ----- - - _- _-- _ ___ _____ 0.54 25.80 0.00 136.56 0.54 0.52 --- ____ -__ _- __- -_ _ 0.52 25.90 0.00 136.54 0.52 0.51 ---- ----- -- ----- - ----- --- 0.51 26.00 0.00 136.52 0.50 0.49 - ----- --- ----- --- ----- ----- 0.49 26.10 0.00 136.51 0.48 0.48 ----- ---- --- -- ---- ----- ----- 0.48 Continues on next page... Page 4 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D EAU Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 26.20 0.00 136.49 0.46 0.46 -- ---- ----- - - - --- -- 0.46 26.30 0.00 136.47 0.45 0.44 ---- ----- ----- 0.44 26.40 0.00 136.46 0.44 0.43 ----- ----- ---- ----- ----- ---- ----- 0.43 26.50 0.00 136.44 0.43 0.41 - - - - - - - 0.41 26.60 0.00 136.43 0.42 0.40 - --- --- - --- ---- -- --- 0.40 26.70 0.00 136.41 0.41 0.38 - ----- ----- ---- ---- --- --- 0_38 26.80 0.00 136.40 0.40 0.37 -__ ___ -- _____ _____ -- _____ 0.37 26.90 0.00 136.39 0.38 0.35 ---- -- --- -- --- ---- -- 0.35 27.00 0.00 136.37 0.37 0.33 ----- ----- ----- ---- ----- ---- ---- 0.33 27.10 0.00 136.36 0.35 0.32 ---- -- ---- --- -- ---- - 0.32 2720 0.00 136.35 0.33 0.30 ---- --- ----- ----- -- -- --- 0.30 ...End APPENDIX H JOB � �,: c.oAzv .� s �Y. esign SHEET NO C rofessionals inc. D ---_-.-- CAECU(,ATF.'D By 6 g� i)ATE. DESIGN STORM fREQUENCY J d CQ� civil engineers planners • surveyors • gis CC// .... CHECKED By .... DATE ------ tncr�resent A x C T.C. i q Ff" To A C r Inc o . min. i r eh Di a;* $. , .:*. t NOTE � V, 0, / 1 1 I) O c r �' • 6 \ O; b °, ,3 ! 3 1 •I G, D, 3 a . ?„3 1 {{...�� 0 15 o YS r ! o 5 5 0 � , f 6 ,6 ,3 f vo / CPS #nci WLL d — 3, 6 g, �u 3.Q JosG4!--� Lv�{a,� STT esign :;HEEI NO 2, of ro essionals, inc. CAICULATF.D BY DATE. DESIGNSTORM fREQ CCN Y/ 1 civil engineers planners surveyors gi. �G I O COIF ... CHECKED 8Y .... .. .. .. DATE ...-...-------------- -- tncrsns�nt A x C T.C. 1 Q , From To A C ro _ n+in. inAr eft S. . Qs V t NOTE 'If DILID D, D6 0,0 1 0 .0t G o• a,4 D. 13o, ,D 3 33 ►5'`i 3.3 eo I 5 . b I `6 a 6r 5 13 c c13cio,/fl o, 3 3 • ?> o, g ck,5 or ,o t, o, 66• o , � ---- —________ Ef —_..__ -------------- APPENDIX I j JOB l a,3 esign :iF1EFi Np OF' professionals, inc. CALCULATFD BY DATE°. DESIGN STORM FREQUENCY errs clvllengineers • planners • surveyors • gia CHECKED BY DATE tncrtmant A x G T.C. i Q From To A C (ncr, o . TIn. i r cfs Dti:. S: 4Q V L ,t NOTE P() ors 3 i C 0•03 DcO � O.O r 1 , 0• B D 0 a, l o, l 6 0 5, 6 oD o� oo �r 6 n, l � �� o, o • Oln s c, ► 0. 03 iJ-G '0 ,�o D. ( , 0 D, r ,S 30' o.o U• fo i JOB I9 esign $HEET NO OP professionals, inc. CALCULATED Ry DESIGN STORM PREQ ^V °ATE. �gNC f LV clvll engineers planners surveyors• g(s �i f COrf • ... CHECKED By ... .. .. .. ........_. ,...._ DATE tncrs nt A x C T.C, I q Frog► To Incr. o . T1n. InAr D.t.,,; S; ; Qs V L t NOTE ©c 6 © o,b� it o Olt o. o,oy Vrt �r 1 � Q D r 0 $, °o 15 o p Ov® .��% D j6 8 b.a o,o � o� ors tt ID 61 c $ �3 0 0,5' , . t� I, 3 .,,,t5lt' 16�� t1 0 3 a �. , S13 jZ61 6, p B Y o 6 0 _.r_._ , 0 3 I o © 0 ob a ► o 0 6 F y , ° r o b 0 0 0 8 - ----_. pr 0. 3 ,tow N Be C ~ O-P slam ? • w� 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CT 06074 s TELEPHONE (860) 644-2511 To: Design Professionals 165 So. Satellite Road South Windsor, CT 06074 From: Jeffrey H. Folger—Environmental Planner/Conservation Officer Date: November 13 2003 Re: App:403rM - Review of the proposed Berry Patch 11 Elderly housing complex—Plans dated 11/04/03. I have reviewed the proposed plan with the following additional comments: Proposed catch basins should have 4-foot sumps incorporated to maximize sediment retention prior to the detention basin. Trap hoods should be installed on all catchbasins receiving runoff from asphalt. The bed composition for the proposed swale and detention basin should include a soil amendment of leaf compost 30%by volume. I'he stream channel should be accurately shown on the plans. soil report has not been received showing soil types present on the site. This should include both upland and hvdric soil types. A report;on the wetland functions and values•should be submitted evaluating the project's potential impacts to wetland function and water quality. /rhe revised plan shows temporary sediment basins installed next to catchbasins. Grading is not shown that would divert runoff to these areas. A phasing plan of earth moving activities has not been submitted. The majority of the site is proposed to be disturbed to accommodate the construction of the dwelling units and parking lots. Perimeter erosion controls-on.the northern.side of the site will have to be reinforced to provide maximum protection to the adjacent wetland areas. Interior erosion controls are needed, with detailed phasing of earth moving included. This should include the establishment of earthen berms;and temporary sediment basins to intercept sediment-laden runoff from the site. Gravel check dams should be placed between the proposed foundations to further slow the runoff velocities travelling downhill. Please refer to the 2002-CT E&S Guidelines for specifications. /A review of the Hartford County Soil Survey shows the soil type occurring on the southern site "/ as Narragansett Silt Loam. Please provide test pit data to determine if infiltration of roof runoff is possible. /The 100-year flood elevation should be shown in the area to be excavated in the northwest portion of the site. Please demonstrate that you will achieve at least a ten-minute residence time within the proposed drainage swales. Please include sediment sumps within the proposed detention basin and biofilter swales sized to hold the estimated annual sediment load. Add silt fence to the toe of proposed cuts. The detail of the temporary sediment basin adjacent to the catchbasin shows a 90-degree riser within the basin. Where does the riser empty? An anti-tracking pad should be installed wherever you will be entering the original Berry Patch site, as well as the northern Buckland Road site. Please show the woody vegetation boundary on the E&S sheets. \,,,""A note should be included within the E&S narrative that any area proposed to be left open for more than 30 days should receive a temporary seeding. CC. Town Engineer Director of Planning REMA ecological Stormwater Management Plan Berry Patch II South Windsor, Connecticut Prepared by Design Professionals, Inc. 165 South Satellite Road South Windsor, CT 06074 DPI Project No. 03-1823 RECEIVED November 4, 2003 DEC 15 2003 Addendum:12/12/03 South Windsor INLAND WETLANDS AGENCY CONSERVATION COMMISSION Table of Contents: Page# Introduction 1 Proposed Development 1 Off-Site Analysis 1 Peak Runoff control 2 Nonstructural Drainage System 2 Riparian Buffers 2 Erosion/Sedimentation Control Systems 2 Storm-water Runoff Quality 2 Conveyance System 2 Discharge at the Natural Location 2 Maintenance and Operation 2 Topographic Contour Maps 3 Floodplain Boundaries 3 Drainage Design 3 Water Quality 5 On-Site Storm Sewer Calculations 5 Conclusions 5 Appendices Site Location Map A TR-55 Existing Conditions- Calvary Site B TR-55 Existing Conditions Katten Site C TR-55 Developed Conditions-Calvary Site D TR-55 Developed Conditions-Katten Site E Detention/Infiltration Basin Design F Detention/Infiltration Basin Routings G Storm Sewer Calculations-Calvary Site H Storm Sewer Calculations-Katten Site I Introduction: The proposed Berry Patch H consists of two sites that are adjacent to the original Berry Patch site located on the south side of Oakland Road in South Windsor, Connecticut. One site is located to the northwest of the existing Berry Patch site and is known as the Katten site. The Katten site consists of 14.15 acres of land and extends from the northeast side of the Berry Patch site out to Buckland Road. The Katten site is bordered by a mixture of residential and commercial uses, and by the assisted living elderly housing. The site is presently being utilized for agricultural purposes as a pasture for cows. The Katten site is traversed by Farm Brook, and has substantial wetland and floodplain areas associated with Farm Brook. The second site is located to the southwest of the existing Berry Patch site and is known as the Calvary site. This site consists of 5.28 acres of land that will be divided off from the existing Calvary Church site. The Calvary church site is bordered by residential to the east,the Calvary Church to the west, open land of the Calvary Church to the south, and the Berry Patch and assisted living elderly housing to the north. Appendix A contains a site location map. Proposed Development: The proposed development of the site includes the construction of 94 elderly housing units contained within 5 buildings. Two of the buildings will be located on the Calvary Church site, and three buildings on the Katten site. As part of the development, access roadways, parking, and driveways will be constructed. Both sections will be serviced by public sanitary sewer and water. The Storm drainage system proposed for the development includes the installation of storm-sewers within the proposed access streets, a vegetated drainage swale, and a piped storm drainage system. The drainage discharge from the development of the Calvary Church site will be to a detention/infiltration basin. The discharge from the Katten site will be to Farm brook. Off-Site Analysis: The large majority of the Calvary Church site presently drains to the northwest to a Swale that runs along the eastern side of the Calvary church and then along the northern property boundary to the west to Buckland Road. The storm sewers within Buckland Road discharge to Farm Brook. A small corner of the Calvary Church site drains to the northeast to the Berry Patch site. The Katten site drains directly to Farm Brook via overland flow. Farm Brook traverses the site from east to west, and discharges from the site under Buckland Road. In this same vicinity, the storm drainage from Buckland Road is discharged into the Farm Brook. Peak Runoff Control: The intent of the design is to provide sufficient detention/infiltration on both the Calvary church site and the Katten site to mitigate the peak stormwater discharges from the developments and reduce the post development peak discharges below existing peak discharges. Nonstructural Drainage Systems: -The site will make use of a number of nonstructural measures to help control the runoff on the site, and help treat the runoff. The most important measures are the Infiltration/Detention basin, and the water quality swales that will collect the runoff from the piped drainage system, and help treat the runoff prior to discharge. Riparian Buffers: Buffer areas will be maintained between the Farm Brook and existing developed areas and the proposed development. Erosion/Sedimentation Control Systems: An extensive erosion/sedimentation control plan has been developed as part of the site design. These measures include the following: I. Installation of silt fence down-slope of disturbed areas. 2. Installation of silt fence around stockpiled materials. 3. Installation of silt fence around catch basins. 4. Use of temporary sediment basins during construction. 5. Seeding and mulching disturbed areas as soon as practical during construction. 6. Limiting the areas of disturbance during construction. 7. Installation of construction entrance pads and sweeping of roadways as needed. 8. Maintenance of the above measures. Stormwater Runoff Quality: A number of water quality measures have been integrated into the site design to provide for treatment of the stormwater runoff from the site. These include the infiltration/detention basins and a water quality swale that will treat the runoff from the site prior to discharge. Conveyance System: The on-site conveyance system consists of a piped stormwater system discharging to the infiltration/detention basin on the Calvary church site and water quality swales on the Katten site. The piped drainage system has been designed to accommodate the runoff from a 10 Yr design storm. Discharge at the Natural Location: The Katten site presently drains to Farm Brook, and will continue to under developed conditions. The Calvary Site presently drains to the swale along the north side of the Calvary Church site, and will continue to under developed conditions. Maintenance and Operation: The following maintenance operations will be required to ensure the proper and efficient operation of the Storm Water System, Infiltration/Detention basins and Water Quality Swale. The following maintenance schedule is intended to be a minimum guide, and additional inspections and maintenance measures may be required following large storm events that could cause the deposition of excess debris in the system. Pipe Outlet Locations: The pipe outlets and associated riprap shall be inspected annually and cleaned of silt and or debris. The riprap shall be re-shaped and replenished as required. Catch Basins: The Catch Basins within each lot shall be inspected annually. The sumps shall be cleaned when the depth of material within the sumps reaches 1'. Pavement Sweeping: The pavement areas shall be swept at a minimum of once per year, in the spring shortly after the end of the snow season. Infiltration/Detention Water Quality Basins and Water Quality Swale: The water quality basin and water quality swales shall be inspected twice yearly. All large woody growth that may affect the flow of water or the stability of the basins or swale shall be removed. The spillway shall also be inspected after any flow passes through it. The riprap shall be re-arranged and added to as required to maintain the design as per the design plans. Any erosion or other problems that may affect the proper operation of the water quality basin or water quality swales shall be repaired promptly. Topographic Contour Maps: Topographic contour maps have been provided showing the drainage areas for the two sites at a scale of 1"=40'. The maps showing the existing and developed conditions are included in the rear of this report. Floodplain Boundaries: There are floodplain boundaries on the Katten site. Drainage Design: The drainage design of the site has been completed utilizing a number of computer programs and generally accepted design methods. The runoff from the site under existing and developed conditions was developed utilizing the TR-55 computer program. The drainage piping on site was designed using the rational formula. The detention/Infiltration basin was sized using a computer program by Hydrographs called Hydroflow. The program allows for the development of hydrographs representing the developed flows into the basin, and the modeling of the basin with elevation/storage/discharge curves to represent the basin. The program than provides the routing of the hydrograph through the basin, and provides peak discharge and storage information. The existing Calvary site and Katten site were modeled using the TR-55 computer program. The small portion of the Calvary site that presently drains to the northeast was not included in the existing conditions drainage calculations. Only the portion of the site draining to the northwest was included in the calculations. On the Katten site, only the portion of the site that will be developed as part of the proposed development was included in the calculations. The TR-55 calculations for the Calvary and Katten sites are included in appendix B and C respectively. The Calvary site was analyzed under developed conditions using the TR-55 computer program. Under developed conditions, there will be an increase in peak runoff from the site. The results of the TR-55 analysis are included in appendix D, and the existing and developed peak discharges(in cubic feet per second) are summarized below: CALVARY SITE Storm Freq. Exist. Peak Discharge Developed Peak Disch. Dev. Peak Disch. (Calvary Site) (Calvary Site) from Det. Basin. 2 2 3 0.28 10 6 8 0.69 25 8 11 0.97 50 11 14 1.23 100 13 17 1.45 The Katten site was analyzed under developed conditions using the TR-55 computer program. The results of the TR-55 analysis are included in appendix E The discharges from both sites end up in the farm brook. In order to mitigate for the peak flows, detention/infiltration basins are proposed on both the Katten site and the Calvary site. The basins have been sized to provide sufficient detention for the 2-100 year storm events. The basins were sized to provide peak flows at or below existing conditions from the combination of both properties. The results are summarized below: KATTEN SITE Storm Freq. Exist. Peak Disch. Dev.Peak Discharge Dev. Peak Discharge Total Dev. (Katten Site) (Detention Basin) (Biofiltration Swale) Disch. 2 2 0.76 1.61 2.37 10 6 1.29 3.04 4.33 25 8 1.46 3.84 5.30 50 10 1.60 4.54 6.14 100 12 1.70 5.25 6.95 TOTALS (COMBINED AREAS) Storm Freq. Total Exist. Devel. Peak Disch. Devel. Peak Disch. Total Dev. Peak Discharge (Katten Property) (Calvary Property) Both sites 2 4 2.37 0.28 2.65 10 12 4.33 0.69 5.02 25 16 5.30 0.97 3.03 50 21 6.14 1.23 7.37 100 25 6.95 1.45 8.40 The proposed detention basins were modeled using the Hydrograph Hydroflo computer program. The basin designs are included in appendix F. The Routing of the storm flows under developed conditions for the 2-100 year storm events were prepared, and are included in appendix G. As can be seen from the detention basin design, the discharge for the 2-100 year storm events is generally substantially less than the existing peak discharge into Farm Brook. Water Quality: A number of measures have been integrated into the site design to address water quality issues from the development of the site. The two most significant design measures are the infiltration/detention basin on the Calvary site, and the detention basin and water quality swale on the Katten site. The infiltration/detention basins have been designed with a volume below the outlet discharge pipe that will provide capacity for the initial flush from the site. This volume exceeds the volume of runoff from the site for a 1.25" rainfall event. The water quality swale has been designed on the Katten site to provide settling and contact with vegetation for the storm runoff prior to discharge to the wetlands. The swale is a minimum of 200' long, and provide stone berms to promote settling and infiltration of runoff from smaller storm events. On-Site Storm Sewer Calculations: The storm sewer calculations for the storm piping within the proposed private roadways are included in appendix H for the Calvary Site and appendix I for the Katten Site. The storm sewer has been designed for a 10-year design storm utilizing the rational formula. Conclusions: The on-site stormwater system with the associated infiltration/detention basin and water quality swale will mitigate any potential water quality and quantity impacts from the development of the site. APPENDIX A APPENDIX B APPENDIX C APPENDIX D APPENDIX E APPENDIX F Reservoir Report Page 1 Reservoir No. 1 - KATTEN Hydraflow Hydrographs by Intelisolve Pond Data Pond storage is based on known contour areas. Average end area method used. Stage/Storage Table Stage(ft) Elevation(ft) Contour area(sqft) Incr.Storage(cult) Total storage(cult) 0.00 89.50 3,645 0 0 0.50 90.00 4,115 1,940 1,940 2.50 92.00 6,640 10,755 12,695 3.50 93.00 8,500 7,570 20,265 4.50 94.00 10,400 9,450 29,715 Culvert/Orifice Structures Weir Structures [A] [B] [C] [D] [A] [B] [C] [D] Rise in = 12.0 6.0 0.0 0.0 Crest Len It = 0.00 0.00 0.00 0.00 Span in = 12.0 6.0 0.0 0.0 Crest El.It = 0.00 0.00 0.00 0.00 No.Barrels = 1 1 0 0 Weir Coeff. = 0.00 0.00 0.00 0.00 Invert El.ft = 89.50 90.00 0.00 0.00 Weir Type = - - - - Length ft = 300.0 1.0 0.0 0.0 Multi-Stage = No No No No Slope% = 0.50 1.00 0.00 0.00 N-Value = .013 .013 .000 .000 Orif.Coeff. = 0.60 0.60 0.00 0.00 Multi-Stage = n/a Yes No No ExHItration Rate = 0.00 in/hr/sgft Tailwater Elev.= 0.00 ft Note:All outflows have been analyzed under inlet and outlet control. Stage/Storage/Discharge Table Stage Storage Elevation Civ A Civ B Civ C Civ D Wr A Wr B Wr C Wr D EAU Total It cult ft cis ds cis ds; cis cis cis cis cfs cfs 0.00 0 89.50 0.00 0.00 --- - -- -- -- -- -- 0.00 0.50 1,940 90.00 0.00 0.00 --- - -- -- -- --- - 0.00 2.50 12,695 92.00 1.27 1.25 - --- - -- - - - 1.25 3.50 20,265 93.00 1.57 1.57 -_ ___ __ ___ __ - __ 1.57 4.50 29,715 94.00 1.83 1.83 -- --- --- -- --- -- -- 1.83 APPENDIX G Hydrograph Summary Report Pagel Hyd. Hydrograph Peak Time Time to Volume Inflow Maximum Maximum Hydrograph No. type flow interval peak hyd(s) elevation storage description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 4.52 1 727 15,594 --- ----- ---- KATTEN-3.07AC-W 2 Reservoir 0.76 1 760 12,733 1 90.89 6,748 KATTEN POND 3 SCS Runoff 1.61 1 725 4,979 — ----- katten-0.95ac-e Proj. file: 1823-KATTEN.gpw Return Period: 2 yr Run date: 12-15-2003 Hydraflow Hydrographs by Intelisolve Hydrograph Summary Report Pagel Hyd. Hydrograph Peak Time Time to Volume Inflow Maximum Maximum Hydrograph No. type flow interval peak hyd(s) elevation storage description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 8.57 1 727 29,293 — --- -- KATTEN-3.07AC-W 2 Reservoir 1.29 1 761 26,037 1 92.11 13,520 KATTEN POND 3 SCS Runoff 3.04 1 725 9,353 --- --- ---- katten-0.95ac-e Proj. file: 1823-KATTEN.gpw Return Period: 10 yr Run date: 12-15-2003 Hydraflow Hydrographs by Intelisolve Hydrograph Summary Report Page Hyd. Hydrograph Peak Time Time to Volume Inflow Maximum Maximum Hydrograph No. type flow interval peak hyd(s) elevation storage description (origin) (cfs) (min) (min) (cult) (ft) (cuft) 1 SCS Runoff 10.83 1 727 37,090 — ----- ---- KATTEN-3.07AC-W 2 Reservoir 1.46 1 766 33,661 1 92.64 17,558 KATTEN POND 3 SCS Runoff 3.84 1 725 11,842 -- - ---- katten-0.95ac-e Proj. file: 1823-KATTEN.gpw Return Period: 25 yr Run date: 12-15-2003 Hydraflow Hydrographs by Intelisolve Hydrograph Summary Report Pagel Hyd. Hydrograph Peak Time Time to Volume Inflow Maximum Maximum Hydrograph No. type flow interval peak hyd(s) elevation storage description (origin) (cfs) (min) (min) (cult) (ft) (cuft) 1 SCS Runoff 12.82 1 727 44,089 ---- --- ----- KATTEN-3.07AC-W 2 Reservoir 1.60 1 770 40,491 1 93.10 21,206 KATTEN POND 3 SCS Runoff 4.54 1 725 14,076 --- ------ - — katten-0.95ac-e Proj. file: 1823-KATTEN.gpw Return Period: 50 yr Run date: 12-15-2003 Hydraflow Hydrographs by Intelisolve Hydrograph Summary Report Pagel Hyd. Hydrograph Peak Time Time to Volume Inflow Maximum Maximum Hydrograph No. type flow interval peak hyd(s) elevation storage description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 14.83 1 727 51,214 -- ---- --- KATTEN-3.07AC-W 2 Reservoir 1.70 1 775 47,410 1 93.50 24,979 KATTEN POND 3 SCS Runoff 5.25 1 725 16,351 -- -- --- kaften-0.95ac-e Proj. file: 1823-KATTEN.gpw Return Period: 100 yr Run date: 12-15-2003 Hydraflow Hydrographs by Intelisolve Hydrograph Report Pagel Hydraflow Hydrographs by Intelisolve Hyd. No. 2 KATTEN POND Hydrograph type = Reservoir Peak discharge = 1.70 cfs Storm frequency = 100 yrs Time interval = 1 min Inflow hyd. No. = 1 Reservoir name = KATTEN Max. Elevation = 93.50 ft Max. Storage = 24,979 cuft Storage Indication method used. Outflow hydrograph volume=47,410 cult Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Civ C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 11.88 5.28 91.11 0.90 0.87 ----- ----- ----- ----- ----- ----- ----- 0.87 11.90 5.54 91.16 0.91 0.90 ----- ----- ----- ----- ----- ----- ----- 0.90 11.92 5.82 91.21 0.93 0.93 ----- ----- ----- ----- ----- ----- ----- 0.93 11.93 6.16 91.27 0.97 0.95 ----- ----- ----- ----- ----- ----- ----- 0.95 11.95 6.60 91.33 1.01 0.98 ----- ----- ----- ----- ----- ----- ----- 0.98 11.97 7.17 91.39 1.05 1.01 ----- ----- ----- ----- ----- ----- ----- 1.01 11.98 7.92 91.46 1.08 1.04 ----- ----- ----- ----- ----- ----- ----- 1.04 12.00 8.88 91.55 1.11 1.08 ----- ----- ----- ----- ----- ----- ----- 1.08 12.02 10.03 91.64 1.14 1.11 ----- ----- ----- ----- ----- ----- ----- 1.11 12.03 11.26 91.74 1.18 1.15 ----- ----- ----- ----- ----- ----- ----- 1.15 12.05 12.46 91.86 1.22 1.20 ----- ----- ----- ----- ----- ----- ----- 1.20 12.07 13.52 91.99 1.26 1.25 ----- ----- ----- ----- ----- ----- ----- 1.25 12.08 14.34 92.09 1.28 1.28 ----- ----- ----- ----- ----- ----- ----- 1.28 12.10 14.78 92.20 1.34 1.32 ----- ----- ----- ----- ----- ----- ----- 1.32 12.12 14.83 << 92.30 1.36 1.35 ----- ----- ----- ----- ----- ----- ----- 1.35 12.13 14.54 92.41 1.41 1.39 ----- ----- ----- ----- ----- ----- ----- 1.39 12.15 13.98 92.51 1.42 1.42 ----- ----- ----- ----- ----- ----- ----- 1.42 12.17 13.22 92.61 1.48 1.45 ----- ----- ----- ----- ----- ----- ----- 1.45 12.18 12.32 92.69 1.48 1.48 ----- ----- ----- ----- ----- ----- ----- 1.48 12.20 11.39 92.78 1.53 1.50 ----- ----- ----- ----- ----- ----- ----- 1.50 12.22 10.49 92.85 1.55 1.52 ----- ----- ----- ----- ----- ----- ----- 1.52 12.23 9.64 92.92 1.55 1.54 ----- ----- ----- ----- ----- ----- ----- 1.54 12.25 8.87 92.98 1.56 1.56 ----- ----- ----- ----- ----- ----- ----- 1.56 12.27 8.22 93.03 1.58 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 12.28 7.69 93.07 1.60 1.59 ----- ----- ----- ----- ----- ----- ----- 1.59 12.30 7.26 93.10 1.62 1.60 ----- ----- ----- ----- ----- ----- ----- 1.60 12.32 6.91 93.14 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 12.33 6.61 93.17 1.62 1.62 ----- ----- ----- ----- ----- ---- ----- 1.62 12.35 6.35 93.20 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 12.37 6.10 93.23 1.64 1.63 ----- ----- ----- ----- ----- ----- ----- 1.63 12.38 5.85 93.26 1.66 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 12.40 5.59 93.28 1.68 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 12.42 5.33 93.31 1.69 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 12.43 5.08 93.33 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 12.45 4.81 93.35 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 12.47 4.55 93.37 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 12.48 4.29 93.39 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 12.50 4.03 93.40 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 Continues on next page... KA17EN POND Page 2 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Civ C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 12.52 3.76 93.42 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 12.53 3.51 93.43 1.69 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 12.55 3.26 93.44 1.69 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 12.57 3.04 93.45 1.69 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 12.58 2.83 93.46 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 12.60 2.66 93.46 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 12.62 2.51 93.47 1.70 1.70 ---- ----- ----- ----- ----- ----- ----- 1.70 12.63 2.38 93.47 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.65 2.28 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.67 2.20 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.68 2.13 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.70 2.08 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.72 2.04 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.73 2.01 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.75 1.98 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.77 1.95 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.78 1.92 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.80 1.90 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.82 1.87 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.83 1.84 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.85 1.81 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.87 1.79 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.88 1.76 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.90 1.73 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.92 1.70 93.50 << 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70<< 12.93 1.67 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.95 1.65 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.97 1.62 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 12.98 1.59 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.00 1.56 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.02 1.53 93.50 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.03 1.51 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.05 1.48 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.07 1.46 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.08 1.43 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.10 1.41 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.12 1.40 93.49 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.13 1.38 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.15 1.37 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.17 1.35 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.18 1.34 93.48 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.20 1.34 93.47 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.22 1.33 93.47 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.23 1.32 93.47 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.25 1.31 93.47 1.70 1.70 ----- ----- ----- ----- ----- ----- ----- 1.70 13.27 1.30 93.46 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.28 1.30 93.46 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.30 1.29 93.46 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.32 1.28 93.46 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.33 1.28 93.45 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.35 1.27 93.45 1.70 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 Continues on next page... KA17EN POND Page 3 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 13.37 1.26 93.45 1.70 1.69 ----- ----- ----- ----- ----- ----- 1.69 13.38 1.25 93.45 1.69 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.40 1.25 93.44 1.69 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.42 1.24 93.44 1.69 1.69 ----- ----- ----- ----- ----- ----- 1.69 13.43 1.23 93.44 1.69 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.45 1.23 93.43 1.69 1.69 ----- ----- ----- ----- ----- ----- 1.69 13.47 1.22 93.43 1.69 1.69 ----- ----- ----- ----- ----- ----- ----- 1.69 13.48 1.21 93.43 1.69 1.69 ----- ----- ----- ----- ----- ----- 1.69 13.50 1.20 93.43 1.69 1.68 ----- ----- ----- ----- ----- ----- 1.68 13.52 1.20 93.42 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.53 1.19 93.42 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.55 1.18 93.42 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.57 1.18 93.41 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.58 1.17 93.41 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.60 1.16 93.41 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.62 1.15 93.40 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.63 1.15 93.40 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.65 1.14 93.40 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.67 1.13 93.39 1.69 1.68 ----- ----- ----- ----- ----- ----- ----- 1.68 13.68 1.12 93.39 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.70 1.12 93.39 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.72 1.11 93.38 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.73 1.10 93.38 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.75 1.09 93.37 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.77 1.09 93.37 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.78 1.08 93.37 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.80 1.07 93.36 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.82 1.07 93.36 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.83 1.06 93.36 1.69 1.67 ----- ----- ----- ----- ----- ----- ----- 1.67 13.85 1.05 93.35 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.87 1.04 93.35 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.88 1.04 93.34 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.90 1.03 93.34 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.92 1.02 93.34 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.93 1.01 93.33 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.95 1.01 93.33 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.97 1.00 93.32 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 13.98 0.99 93.32 1.69 1.66 ----- ----- ----- ----- ----- ----- ----- 1.66 14.00 0.98 93.31 1.69 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.02 0.98 93.31 1.69 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.03 0.97 93.31 1.69 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.05 0.96 93.30 1.69 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.07 0.96 93.30 1.68 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.08 0.95 93.29 1.68 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.10 0.94 93.29 1.68 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.12 0.94 93.28 1.68 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.13 0.93 93.28 1.67 1.65 ----- ----- ----- ----- ----- ----- ----- 1.65 14.15 0.93 93.27 1.67 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 14.17 0.92 93.27 1.67 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 14.18 0.92 93.27 1.66 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 14.20 0.92 93.26 1.66 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 Continues on next page... KA17EN POND Page 4 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D EAU Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 14.22 0.91 93.26 1.66 1.64 ----- ----- ----- ----- --- ----- 1.64 14.23 0.91 93.25 1.66 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 14.25 0.90 93.25 1.65 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 14.27 0.90 93.24 1.65 1.64 ----- ----- ----- ----- ----- ----- ----- 1.64 14.28 0.90 93.24 1.65 1.63 ----- ----- ----- ----- ----- ----- ----- 1.63 14.30 0.89 93.23 1.64 1.63 ----- ----- ----- ----- ----- ----- ----- 1.63 14.32 0.89 93.23 1.64 1.63 ----- ----- ----- ----- ----- ----- ----- 1.63 14.33 0.89 93.22 1.64 1.63 ----- ----- ----- ----- ----- ----- ----- 1.63 14.35 0.88 93.22 1.64 1.63 ----- ----- ----- ----- ----- ----- 1.63 14.37 0.88 93.21 1.63 1.63 ----- ----- ----- ----- ----- ---- ----- 1.63 14.38 0.88 93.21 1.63 1.63 ----- ----- ----- ----- ----- ----- ----- 1.63 14.40 0.87 93.20 1.63 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.42 0.87 93.20 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.43 0.87 93.19 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.45 0.86 93.19 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.47 0.86 93.18 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.48 0.86 93.18 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.50 0.85 93.17 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.52 0.85 93.17 1.62 1.62 ----- ----- ----- ----- ----- ----- ----- 1.62 14.53 0.84 93.16 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 14.55 0.84 93.16 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 14.57 0.84 93.15 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 14.58 0.83 93.15 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 14.60 0.83 93.15 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 14.62 0.83 93.14 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 14.63 0.82 93.14 1.62 1.61 ----- ----- ----- ----- ----- ----- ----- 1.61 14.65 0.82 93.13 1.62 1.60 ----- ----- ----- ----- ----- ----- ----- 1.60 14.67 0.82 93.13 1.62 1.60 ----- ----- ----- ----- ----- ----- ----- 1.60 14.68 0.81 93.12 1.62 1.60 ----- ----- ----- ----- ----- ----- ----- 1.60 14.70 0.81 93.11 1.62 1.60 ----- ----- ----- ----- ----- ----- ----- 1.60 14.72 0.81 93.11 1.62 1.60 ----- ----- ---- ----- ----- ----- ----- 1.60 14.73 0.80 93.10 1.62 1.60 ----- ----- ----- ----- ----- ----- ----- 1.60 14.75 0.80 93.10 1.62 1.60 ----- ----- ----- ----- ----- ----- ----- 1.60 14.77 0.80 93.09 1.62 1.59 ----- ----- ----- ----- ----- ----- ----- 1.59 14.78 0.79 93.09 1.61 1.59 ----- ----- ----- ----- ----- ----- ----- 1.59 14.80 0.79 93.08 1.61 1.59 ----- ----- ----- ----- ----- ----- ----- 1.59 14.82 0.78 93.08 1.61 1.59 ----- ----- ----- ----- ----- ----- ----- 1.59 14.83 0.78 93.07 1.61 1.59 ----- ----- ----- ----- ----- ----- ----- 1.59 14.85 0.78 93.07 1.60 1.59 ----- ----- ----- ----- ----- ----- ----- 1.59 14.87 0.77 93.06 1.60 1.59 ----- ----- ----- ----- ---- ----- ----- 1.59 14.88 0.77 93.06 1.60 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 14.90 0.77 93.05 1.59 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 14.92 0.76 93.05 1.59 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 14.93 0.76 93.04 1.59 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 14.95 0.76 93.04 1.59 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 14.97 0.75 93.03 1.58 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 14.98 0.75 93.03 1.58 1.58 ----- ----- ----- ----- ----- ----- ----- 1.58 15.00 0.75 93.02 1.58 1.57 ----- ----- ----- ----- ----- ----- ----- 1.57 15.02 0.74 93.02 1.58 1.57 ----- ----- ----- ----- ----- ----- ----- 1.57 15.03 0.74 93.01 1.57 1.57 ----- ----- ----- ----- ----- ----- ----- 1.57 15.05 0.73 93.01 1.57 1.57 ----- ----- ----- ----- ----- ----- ----- 1.57 Continues on next page... KATTEN POND Page 5 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 15.07 0.73 93.00 1.57 1.57 ----- ----- ----- ----- ----- ----- ----- 1.57 15.08 0.73 92.99 1.57 1.57 ----- ----- ----- ----- ----- ----- ----- 1.57 15.10 0.72 92.99 1.57 1.56 ----- ----- ----- ----- ----- ----- 1.56 15.12 0.72 92.98 1.56 1.56 ----- ----- ----- ----- ----- ----- 1.56 15.13 0.72 92.97 1.56 1.56 ----- ----- ----- ----- ----- ----- ----- 1.56 15.15 0.71 92.97 1.56 1.56 ----- ----- ----- ----- ----- ----- ----- 1.56 15.17 0.71 92.96 1.56 1.56 ----- ----- ----- ----- ----- ----- 1.56 15.18 0.71 92.95 1.56 1.55 ----- ----- ----- ----- ----- ----- ----- 1.55 15.20 0.70 92.95 1.56 1.55 ----- ---- ----- ----- ----- ----- ----- 1.55 15.22 0.70 92.94 1.56 1.55 ----- ----- ----- ---- ----- ----- ----- 1.55 15.23 0.69 92.93 1.56 1.55 ----- ----- ----- ----- ----- ----- 1.55 15.25 0.69 92.93 1.55 1.55 ----- ----- ----- ----- ----- ----- ----- 1.55 15.27 0.69 92.92 1.55 1.54 ----- ----- ----- ----- ----- ----- ----- 1.54 15.28 0.68 92.91 1.55 1.54 ----- ----- ---- ----- ----- ----- ----- 1.54 15.30 0.68 92.91 1.55 1.54 ----- ----- ----- ----- ----- ----- ----- 1.54 15.32 0.68 92.90 1.55 1.54 ----- ----- ----- ----- ----- ----- ----- 1.54 15.33 0.67 92.89 1.55 1.54 ----- ----- ----- ----- ----- ----- ----- 1.54 15.35 0.67 92.89 1.55 1.53 ----- ----- ----- ----- ----- ----- ----- 1.53 15.37 0.67 92.88 1.55 1.53 ----- ----- ----- ----- ----- ----- ----- 1.53 15.38 0.66 92.87 1.55 1.53 ----- ----- ----- ----- ----- ----- ----- 1.53 15.40 0.66 92.86 1.55 1.53 ----- ----- ----- ----- ----- ----- ----- 1.53 15.42 0.66 92.86 1.55 1.53 ----- ----- ----- ----- ----- ----- ----- 1.53 15.43 0.65 92.85 1.55 1.52 ----- ----- ----- ----- ----- ----- ----- 1.52 15.45 0.65 92.84 1.55 1.52 ----- ----- ----- ----- ----- ----- ----- 1.52 15.47 0.64 92.84 1.55 1.52 ----- ----- ----- ----- ----- ----- ----- 1.52 15.48 0.64 92.83 1.55 1.52 ----- ----- ----- ----- ----- ----- ----- 1.52 15.50 0.64 92.82 1.55 1.52 ----- ----- ----- ----- ----- ----- ----- 1.52 15.52 0.63 92.82 1.55 1.51 ----- ----- ----- ----- ----- ----- ----- 1.51 15.53 0.63 92.81 1.55 1.51 ----- ----- ----- ----- ----- ----- ----- 1.51 15.55 0.63 92.80 1.55 1.51 ----- ----- ----- ----- ----- ----- ----- 1.51 15.57 0.62 92.79 1.55 1.51 ----- ----- ----- ----- ----- ----- ----- 1.51 15.58 0.62 92.79 1.54 1.51 ----- ----- ----- ----- ----- ----- ----- 1.51 15.60 0.62 92.78 1.54 1.50 ----- ----- ----- ----- ----- ----- ----- 1.50 15.62 0.61 92.77 1.53 1.50 ----- ----- ----- ----- ----- ----- ----- 1.50 15.63 0.61 92.77 1.53 1.50 ----- ----- ----- ----- ----- ----- ----- 1.50 15.65 0.60 92.76 1.52 1.50 ----- ----- ----- ---- ----- ----- ----- 1.50 15.67 0.60 92.75 1.52 1.50 ----- ----- ----- ----- ----- ----- ----- 1.50 15.68 0.60 92.75 1.51 1.49 ----- ----- ----- ----- ----- ----- ----- 1.49 15.70 0.59 92.74 1.51 1.49 ----- ----- ----- ----- ----- ----- ----- 1.49 15.72 0.59 92.73 1.50 1.49 ----- ----- ----- ----- ----- ----- ----- 1.49 15.73 0.59 92.72 1.50 1.49 ----- ----- ----- ----- ----- ----- ----- 1.49 15.75 0.58 92.72 1.49 1.48 ----- ----- ----- ----- ----- ----- ----- 1.48 15.77 0.58 92.71 1.49 1.48 ----- ----- ----- ----- ----- ----- ----- 1.48 15.78 0.58 92.70 1.48 1.48 ----- ----- ----- ----- ----- ----- ----- 1.48 15.80 0.57 92.69 1.48 1.48 ----- ----- ----- ----- ----- ----- ----- 1.48 15.82 0.57 92.69 1.48 1.48 ----- ----- ----- ----- ----- ----- ----- 1.48 15.83 0.56 92.68 1.48 1.47 ----- ----- ----- ----- ----- ----- ----- 1.47 15.85 0.56 92.67 1.48 1.47 ----- ----- ----- ----- ----- ----- ----- 1.47 15.87 0.56 92.67 1.48 1.47 ----- ----- ----- ----- ----- ----- ----- 1.47 15.88 0.55 92.66 1.48 1.47 ----- ----- ----- ----- ----- ----- ----- 1.47 15.90 0.55 92.65 1.48 1.46 ----- ----- ----- ----- ----- ----- ----- 1.46 Continues on next page... KA17EN POND Page 6 Hydrograph Discharge Table Time Inflow Elevation Civ A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 15.92 0.55 92.64 1.48 1.46 ----- ----- ----- ----- ----- ----- ----- 1.46 15.93 0.54 92.64 1.48 1.46 ----- ----- ----- ----- ----- ----- ----- 1.46 15.95 0.54 92.63 1.48 1.46 ----- ----- ----- ----- ----- ----- ----- 1.46 15.97 0.53 92.62 1.48 1.46 ----- ----- ----- ----- ----- ----- ----- 1.46 15.98 0.53 92.61 1.48 1.45 ----- ----- ----- ----- ----- ----- ----- 1.45 16.00 0.53 92.61 1.48 1.45 ----- ----- ----- ----- ----- ----- ----- 1.45 16.02 0.52 92.60 1.48 1.45 ----- ----- ----- ----- ----- ----- ----- 1.45 16.03 0.52 92.59 1.47 1.45 ----- ----- ----- ----- ----- ----- ----- 1.45 16.05 0.52 92.59 1.47 1.44 ----- ----- ----- ----- ----- ----- ----- 1.44 16.07 0.51 92.58 1.47 1.44 ----- ----- ----- ----- ----- ----- ----- 1.44 16.08 0.51 92.57 1.46 1.44 ----- ----- ----- ----- ----- ----- ----- 1.44 16.10 0.51 92.56 1.46 1.44 ----- ----- ----- ----- ----- ----- ----- 1.44 16.12 0.51 92.56 1.45 1.44 ----- ----- ----- ----- ----- ----- ----- 1.44 16.13 0.50 92.55 1.45 1.43 ----- ----- ----- ----- ----- ----- ----- 1.43 16.15 0.50 92.54 1.44 1.43 ----- ----- ----- ----- ----- ----- ----- 1.43 16.17 0.50 92.53 1.44 1.43 ----- ----- ----- ----- ----- ----- ----- 1.43 16.18 0.50 92.53 1.43 1.43 ----- ----- ----- ----- ----- ----- ----- 1.43 16.20 0.49 92.52 1.43 1.42 ----- ----- ----- ----- ----- ----- ----- 1.42 16.22 0.49 92.51 1.43 1.42 ----- ----- ----- ----- ----- ----- ----- 1.42 16.23 0.49 92.50 1.42 1.42 ----- ----- ----- ----- ----- ----- ----- 1.42 16.25 0.49 92.50 1.42 1.42 ----- ----- ----- ----- ----- ----- ----- 1.42 16.27 0.49 92.49 1.42 1.41 ----- ----- ----- ----- ----- ----- ----- 1.41 16.28 0.49 92.48 1.42 1.41 ----- ----- ----- ----- ----- ----- ----- 1.41 16.30 0.49 92.47 1.42 1.41 ----- ----- ----- ----- ----- ----- ----- 1.41 16.32 0.48 92.47 1.41 1.41 ----- ----- ----- ----- ----- ----- ----- 1.41 16.33 0.48 92.46 1.41 1.41 ----- ----- ----- ----- ----- ----- ----- 1.41 16.35 0.48 92.45 1.41 1.40 ----- ----- ----- ----- ----- ----- ----- 1.40 16.37 0.48 92.45 1.41 1.40 ----- ----- ----- ----- ----- ----- ----- 1.40 16.38 0.48 92.44 1.41 1.40 ----- ----- ----- ----- ----- ----- ----- 1.40 16.40 0.48 92.43 1.41 1.40 ----- ----- ----- ----- ----- ----- ----- 1.40 16.42 0.47 92.42 1.41 1.39 ----- ----- ----- ----- ----- ----- ----- 1.39 16.43 0.47 92.42 1.41 1.39 ----- ----- ----- ----- ----- ----- ----- 1.39 16.45 0.47 92.41 1.41 1.39 ----- ----- ----- ----- ----- ----- ---- 1.39 16.47 0.47 92.40 1.41 1.39 ----- ----- ----- ----- ----- ----- ----- 1.39 16.48 0.47 92.39 1.41 1.38 ----- ----- ----- ----- ----- ----- ----- 1.38 16.50 0.47 92.39 1.40 1.38 ----- ----- ----- ----- ----- ----- ----- 1.38 16.52 0.46 92.38 1.40 1.38 ----- ----- ----- ----- ----- ----- ----- 1.38 16.53 0.46 92.37 1.39 1.38 ----- ----- ----- ----- ----- ----- ----- 1.38 16.55 0.46 92.37 1.39 1.37 ----- ----- ----- ----- ----- ----- ----- 1.37 16.57 0.46 92.36 1.39 1.37 ----- ---- ----- ----- ----- ----- ----- 1.37 16.58 0.46 92.35 1.38 1.37 ----- ----- ----- ----- ----- ----- ----- 1.37 16.60 0.46 92.34 1.38 1.37 ----- ----- ----- ----- ----- ----- ----- 1.37 16.62 0.46 92.34 1.37 1.37 ----- ----- ----- ----- ----- ----- ----- 1.37 16.63 0.45 92.33 1.37 1.36 ----- ----- ----- ----- ----- ----- ----- 1.36 16.65 0.45 92.32 1.37 1.36 ----- ----- ----- ----- ----- ----- ----- 1.36 16.67 0.45 92.31 1.36 1.36 ---- ----- ----- ----- ----- ----- ----- 1.36 16.68 0.45 92.31 1.36 1.36 ----- ----- ----- ----- ----- ----- ----- 1.36 16.70 0.45 92.30 1.35 1.35 ----- ----- ----- ----- ----- ----- ----- 1.35 16.72 0.45 92.29 1.35 1.35 ----- ----- ----- ----- ----- ----- ----- 1.35 16.73 0.44 92.29 1.35 1.35 ----- ----- ----- ----- ----- ----- ----- 1.35 16.75 0.44 92.28 1.35 1.35 ----- ----- ----- ----- ----- ----- ----- 1.35 Continues on next page... KATTEN POND Page 7 Hydrograph Discharge Table Time Inflow Elevation Clv A Civ B Civ C Civ D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 16.77 0.44 92.27 1.35 1.34 ----- ----- ----- ----- ----- ----- ----- 1.34 16.78 0.44 92.26 1.35 1.34 ----- ----- ----- ----- ----- ----- ----- 1.34 16.80 0.44 92.26 1.35 1.34 ----- ----- ----- ----- ----- ----- ----- 1.34 16.82 0.44 92.25 1.35 1.34 ----- ----- ----- ----- ----- ----- ----- 1.34 16.83 0.43 92.24 1.34 1.33 ----- ----- ----- ----- ----- ----- ----- 1.33 16.85 0.43 92.24 1.34 1.33 ----- ----- ----- ----- ----- ----- 1.33 16.87 0.43 92.23 1.34 1.33 ----- ----- ----- ----- ----- ----- ----- 1.33 16.88 0.43 92.22 1.34 1.33 ----- ----- ----- ----- ----- ----- ----- 1.33 16.90 0.43 92.21 1.34 1.32 ----- ----- ----- ----- ----- ----- 1.32 16.92 0.43 92.21 1.34 1.32 ----- ----- ----- ----- ----- ----- ----- 1.32 16.93 0.42 92.20 1.34 1.32 ----- ----- ----- ----- ----- ----- ----- 1.32 16.95 0.42 92.19 1.33 1.32 ----- ----- ----- ----- ----- ----- ----- 1.32 16.97 0.42 92.19 1.33 1.32 ----- ----- ----- ----- ----- ----- ----- 1.32 16.98 0.42 92.18 1.33 1.31 ----- ----- ----- ----- ----- ----- ----- 1.31 17.00 0.42 92.17 1.32 1.31 ----- ----- ----- ----- ----- ----- ----- 1.31 17.02 0.42 92.16 1.32 1.31 ----- ----- ----- ----- ----- ----- ----- 1.31 17.03 0.42 92.16 1.32 1.31 ----- ----- ----- ----- ----- ----- ----- 1.31 17.05 0.41 92.15 1.31 1.30 ----- ----- ----- ----- ----- ----- ----- 1.30 17.07 0.41 92.14 1.31 1.30 ----- ----- ----- ----- ----- ----- ----- 1.30 17.08 0.41 92.14 1.30 1.30 ----- ----- ----- ----- ----- ----- ----- 1.30 17.10 0.41 92.13 1.30 1.30 ----- ----- ----- ----- ----- ----- ----- 1.30 17.12 0.41 92.12 1.30 1.29 ----- ----- ----- ----- ----- ----- ----- 1.29 17.13 0.41 92.11 1.29 1.29 ----- ----- ----- ----- ----- ----- ----- 1.29 17.15 0.40 92.11 1.29 1.29 ----- ----- ----- ----- ----- ----- ----- 1.29 17.17 0.40 92.10 1.29 1.29 ----- ----- ----- ----- ----- ----- ----- 1.29 17.18 0.40 92.09 1.28 1.28 ----- ----- ----- ----- ----- ----- ----- 1.28 17.20 0.40 92.09 1.28 1.28 ----- ----- ----- ----- ----- ----- ----- 1.28 17.22 0.40 92.08 1.28 1.28 ----- ----- ----- ----- ----- ----- ---- 1.28 17.23 0.40 92.07 1.28 1.28 ----- ----- ----- ----- ----- ----- ----- 1.28 17.25 0.39 92.07 1.28 1.27 ----- ----- ----- ----- ----- ----- ----- 1.27 17.27 0.39 92.06 1.28 1.27 ----- ----- ----- ----- ----- ----- ----- 1.27 17.28 0.39 92.05 1.28 1.27 ----- ----- ----- ----- ----- ----- ----- 1.27 17.30 0.39 92.04 1.28 1.27 ----- ----- ----- ----- ----- ----- ----- 1.27 17.32 0.39 92.04 1.27 1.26 ----- ----- ----- ----- ----- ----- ----- 1.26 17.33 0.39 92.03 1.27 1.26 ----- ----- ----- ----- ----- ----- ----- 1.26 17.35 0.39 92.02 1.27 1.26 ----- ----- ----- ----- ----- ----- ----- 1.26 17.37 0.38 92.02 1.27 1.26 ----- ----- ----- ----- ----- ----- ----- 1.26 17.38 0.38 92.01 1.27 1.25 ----- ----- ----- ----- ----- ----- ----- 1.25 17.40 0.38 92.00 1.27 1.25 ----- ----- ----- ----- ----- ----- ----- 1.25 17.42 0.38 91.99 1.27 1.25 ----- ----- ----- ----- ----- ----- ----- 1.25 17.43 0.38 91.98 1.26 1.24 ----- ----- ----- ----- ----- ----- ----- 1.24 17.45 0.38 91.98 1.26 1.24 ----- ----- ----- ----- ----- ----- ----- 1.24 17.47 0.37 91.97 1.26 1.24 ----- ----- ----- ----- ----- ----- ----- 1.24 17.48 0.37 91.96 1.25 1.23 ----- ----- ----- ----- ----- ----- ----- 1.23 17.50 0.37 91.95 1.25 1.23 ----- ----- ----- ----- ----- ----- ----- 1.23 17.52 0.37 91.94 1.25 1.23 ----- ----- ----- ----- ----- ----- ----- 1.23 17.53 0.37 91.93 1.24 1.22 ----- ----- ----- ----- ----- ----- ----- 1.22 17.55 0.37 91.92 1.24 1.22 ----- ----- ----- ----- ----- ----- ----- 1.22 17.57 0.36 91.91 1.24 1.22 ----- ----- ----- ----- ----- ----- ----- 1.22 17.58 0.36 91.90 1.23 1.21 ----- ----- ----- ----- ----- ----- ----- 1.21 17.60 0.36 91.89 1.23 1.21 ----- ----- ----- ----- ----- ----- ----- 1.21 Continues on next page... KA17EN POND Page 8 Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D EAU Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 17.62 0.36 91.88 1.23 1.21 ----- ----- ----- ----- ----- ----- 1.21 17.63 0.36 91.87 1.22 1.20 ----- ----- ----- ----- ----- ----- 1.20 17.65 0.36 91.86 1.22 1.20 ----- ----- ----- ----- ----- ----- ----- 1.20 17.67 0.35 91.85 1.22 1.20 ----- ----- ----- ----- ----- 1.20 17.68 0.35 91.84 1.21 1.19 ----- ----- ----- ----- ----- ----- ----- 1.19 17.70 0.35 91.83 1.21 1.19 ----- ----- ----- ----- ----- ----- 1.19 17.72 0.35 91.82 1.21 1.19 ----- ----- ----- ----- ----- ----- ----- 1.19 17.73 0.35 91.81 1.20 1.18 ----- ----- ----- ----- ----- ----- 1.18 17.75 0.35 91.80 1.20 1.18 ----- ----- ----- ----- ----- ----- 1.18 17.77 0.34 91.79 1.20 1.17 ----- ----- ----- ----- ----- ----- ----- 1.17 17.78 0.34 91.79 1.19 1.17 ----- ----- ----- ----- ----- ----- 1.17 17.80 0.34 91.78 1.19 1.17 ----- ----- ----- ----- ----- ----- 1.17 17.82 0.34 91.77 1.19 1.16 ----- ----- ----- ----- ----- ----- ----- 1.16 17.83 0.34 91.76 1.18 1.16 ----- ----- ----- ----- ----- ----- 1.16 17.85 0.34 91.75 1.18 1.16 ----- ----- ----- ----- ----- ----- 1.16 17.87 0.34 91.74 1.18 1.15 ---- ----- ----- ----- ----- ----- ----- 1.15 17.88 0.33 91.73 1.17 1.15 ----- ----- ----- ----- ----- ----- ----- 1.15 17.90 0.33 91.72 1.17 1.15 ----- ----- ----- ----- ----- ----- ----- 1.15 17.92 0.33 91.71 1.17 1.14 ----- ----- ----- ----- ----- ----- 1.14 17.93 0.33 91.70 1.16 1.14 ----- ----- ----- ----- ----- ----- ----- 1.14 17.95 0.33 91.69 1.16 1.14 ----- ----- ----- ----- ----- ----- ----- 1.14 17.97 0.33 91.69 1.16 1.13 ----- ----- ----- ----- ----- ----- 1.13 17.98 0.32 91.68 1.15 1.13 ----- ----- ----- ----- ----- ----- ----- 1.13 18.00 0.32 91.67 1.15 1.12 ----- ----- ----- ----- ----- ----- ----- 1.12 18.02 0.32 91.66 1.15 1.12 ----- ----- ----- ----- ----- ----- 1.12 18.03 0.32 91.65 1.15 1.12 ----- ----- ----- ----- ----- ----- ----- 1.12 18.05 0.32 91.64 1.14 1.11 ----- ----- ----- ----- ----- ----- ----- 1.11 18.07 0.32 91.63 1.14 1.11 ----- ----- ----- ----- ----- ----- ----- 1.11 18.08 0.32 91.62 1.14 1.11 ----- ----- ----- ----- ----- ----- ----- 1.11 18.10 0.31 91.61 1.13 1.10 ----- ----- ----- ----- ----- ----- ----- 1.10 18.12 0.31 91.60 1.13 1.10 ----- ----- ----- ----- ----- ----- 1.10 18.13 0.31 91.60 1.13 1.10 ----- ----- ----- ----- ----- ----- ----- 1.10 18.15 0.31 91.59 1.12 1.09 ----- ----- ----- ----- ----- ----- ----- 1.09 18.17 0.31 91.58 1.12 1.09 ----- ----- ----- ----- ----- ----- ----- 1.09 18.18 0.31 91.57 1.12 1.09 ----- ----- ----- ----- ----- ----- ----- 1.09 18.20 0.31 91.56 1.12 1.08 ----- ----- ----- ----- ----- ----- ----- 1.08 18.22 0.31 91.55 1.11 1.08 ----- ----- ----- ----- ----- ----- ---- 1.08 18.23 0.31 91.54 1.11 1.07 ----- ----- ----- ----- ----- ----- ----- 1.07 18.25 0.31 91.54 1.11 1.07 ----- ----- ----- ----- ----- ----- ----- 1.07 18.27 0.31 91.53 1.10 1.07 ----- ----- ----- ----- ----- ----- ----- 1.07 18.28 0.31 91.52 1.10 1.06 ----- ----- ----- ----- ----- ----- ----- 1.06 18.30 0.31 91.51 1.10 1.06 ----- ----- ----- ----- ----- ----- ----- 1.06 18.32 0.31 91.50 1.09 1.06 ----- ----- ----- ----- ----- ----- ----- 1.06 18.33 0.31 91.49 1.09 1.05 ----- ----- ----- ----- ----- ----- ----- 1.05 18.35 0.30 91.48 1.09 1.05 ----- ----- ----- ----- ----- ----- ----- 1.05 18.37 0.30 91.48 1.09 1.05 ----- ----- ----- ----- ----- ----- ----- 1.05 18.38 0.30 91.47 1.08 1.04 ----- ----- ----- ----- ----- ----- ----- 1.04 18.40 0.30 91.46 1.08 1.04 ----- ----- ----- ----- ----- ----- ----- 1.04 18.42 0.30 91.45 1.08 1.04 ----- ----- ----- ----- ----- ----- ----- 1.04 18.43 0.30 91.44 1.07 1.03 ----- ----- ----- ----- ----- ----- ----- 1.03 18.45 0.30 91.44 1.07 1.03 ----- ----- ----- ----- ----- ----- ----- 1.03 Continues on next page... KA17EN POND Page 9 Hydrograph Discharge Table Time Inflow Elevation Clv A Civ B Clv C Clv D Wr A Wr B Wr C Wr D Exfil Outflow (hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 18.47 0.30 91.43 1.07 1.03 ----- ----- ----- ----- ----- ----- ----- 1.03 18.48 0.30 91.42 1.07 1.02 ----- ----- ----- ----- ----- ----- ----- 1.02 18.50 0.30 91.41 1.06 1.02 ----- ----- ----- ----- ----- ----- ----- 1.02 18.52 0.30 91.40 1.06 1.02 ----- ----- ----- ----- ----- ----- ----- 1.02 18.53 0.30 91.40 1.06 1.01 ----- ----- ----- ----- ----- ----- ----- 1.01 18.55 0.30 91.39 1.05 1.01 ----- ----- ----- ----- ----- ----- ----- 1.01 18.57 0.30 91.38 1.05 1.00 ----- ----- ----- ----- ----- ----- ----- 1.00 18.58 0.30 91.37 1.04 1.00 ----- ----- ----- ----- ----- ----- ----- 1.00 18.60 0.30 91.36 1.04 1.00 ----- ----- ----- ----- ----- ----- ----- 1.00 18.62 0.30 91.36 1.03 0.99 ----- ----- ----- ----- ----- ----- ----- 0.99 18.63 0.30 91.35 1.03 0.99 ----- ----- ----- ----- ----- ----- ----- 0.99 18.65 0.30 91.34 1.02 0.99 ----- ----- ----- ----- ----- ----- ----- 0.99 18.67 0.30 91.33 1.02 0.98 ----- ----- ----- ----- ----- ----- ----- 0.98 18.68 0.30 91.32 1.01 0.98 ----- ----- ----- ----- ----- ----- ----- 0.98 18.70 0.29 91.32 1.00 0.98 ----- ----- ----- ----- ----- ----- ----- 0.98 18.72 0.29 91.31 1.00 0.97 ----- ----- ----- ----- ----- ----- ----- 0.97 18.73 0.29 91.30 0.99 0.97 ----- ----- ----- ----- ----- ----- ----- 0.97 18.75 0.29 91.29 0.99 0.97 ----- ----- ----- ----- ----- ----- ----- 0.97 18.77 0.29 91.29 0.98 0.96 ----- ----- ----- ----- ----- ----- ----- 0.96 18.78 0.29 91.28 0.98 0.96 ----- ----- ----- ----- ----- ----- ----- 0.96 18.80 0.29 91.27 0.97 0.95 ----- ----- ----- ----- ----- ----- ----- 0.95 18.82 0.29 91.26 0.97 0.95 ----- ----- ----- ----- ----- ----- ---- 0.95 18.83 0.29 91.26 0.97 0.95 ----- ----- ----- ----- ----- ----- ----- 0.95 18.85 0.29 91.25 0.96 0.94 ----- ----- ----- ----- ----- ----- ----- 0.94 18.87 0.29 91.24 0.96 0.94 ----- ----- ----- ----- ----- ----- ----- 0.94 18.88 0.29 91.24 0.95 0.94 ----- ----- ----- ----- ----- ----- ----- 0.94 18.90 0.29 91.23 0.95 0.93 ----- ----- ----- ----- ----- ----- ----- 0.93 18.92 0.29 91.22 0.94 0.93 ----- ----- ----- ----- ----- ----- ----- 0.93 18.93 0.29 91.21 0.94 0.93 ----- ----- ----- ----- ----- ----- ----- 0.93 18.95 0.29 91.21 0.93 0.92 ----- ----- ----- ----- ----- ----- ----- 0.92 18.97 0.29 91.20 0.93 0.92 ----- ----- ----- ----- ----- ----- ----- 0.92 18.98 0.29 91.19 0.92 0.92 ----- ----- ----- ----- ----- ----- ----- 0.92 19.00 0.29 91.19 0.92 0.91 ----- ----- ----- ----- ----- ----- ----- 0.91 19.02 0.29 91.18 0.92 0.91 ----- ----- ----- ----- ----- ----- ----- 0.91 19.03 0.29 91.17 0.92 0.91 ----- ----- ----- ----- ----- ----- ----- 0.91 19.05 0.28 91.16 0.92 0.90 ----- ----- ----- ----- ----- ----- ----- 0.90 19.07 0.28 91.16 0.91 0.90 ----- ----- ----- ----- ----- ----- ----- 0.90 19.08 0.28 91.15 0.91 0.90 ----- ----- ----- ----- ----- ----- ----- 0.90 19.10 0.28 91.14 0.91 0.89 ----- ----- ----- ----- ----- ----- ----- 0.89 19.12 0.28 91.14 0.91 0.89 ----- ----- ----- ----- ----- ----- ---- 0.89 19.13 0.28 91.13 0.90 0.89 ----- ----- ----- ----- ----- ----- ----- 0.89 19.15 0.28 91.12 0.90 0.88 ----- ----- ----- ----- ----- ----- ----- 0.88 19.17 0.28 91.12 0.90 0.88 ----- ----- ----- ----- ----- ----- ----- 0.88 19.18 0.28 91.11 0.90 0.88 ----- ----- ----- ----- ----- ----- ----- 0.88 19.20 0.28 91.10 0.90 0.87 ----- ----- ----- ----- ----- ----- ----- 0.87 19.22 0.28 91.10 0.89 0.87 ----- ----- ----- ----- ----- ----- ----- 0.87 19.23 0.28 91.09 0.89 0.87 ----- ----- ----- ----- ----- ----- ----- 0.87 19.25 0.28 91.08 0.89 0.86 ----- ----- ----- ----- ----- ----- ----- 0.86 19.27 0.28 91.08 0.89 0.86 ----- ----- ----- ----- ----- ----- ----- 0.86 19.28 0.28 91.07 0.89 0.86 ----- ----- ----- ----- ----- ----- ----- 0.86 ...End APPENDIX H APPENDIX I Inlet Station/O.S. or C.B. No. Area (A) in Acres Runoff Coefficient (C) IS I Flow to Inlet (Q) C.f.S. Gr�—de of Gutter ft./ft. Cross Slope ft./ft. Depth of Flow at Gutter—�ft.) Width of Flow (ft.) Flow- Bypassing Inlet -c.f.s. v 'Aosptqm tgnos AS 03>1331-13 I vJA -AG 030IS30 99L9-W� (COZ) 'OUI 'SIDUOIS119 Z70MIlTI 3iVO ---O-T—MM NOISM U 6 1 SI: ajoAsAArm- sAauuDjd rajoeulbue UAlo 9 IS tL e T-7TIT--NOLLVOO-1 SISA1YNVMO-U 8auno -T- fVUVjj�w-t�1031`08d Ali, ��� , / COACAT-11 OF INLETS d e ' Of - ---- - p 3 0 1�1 111to B �iiim����� muniiin (OWN Sf4 "Xn O-P S � 4 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CONN. 06074 ox•Co AREA CODE 860/644-2511 To: Design Professionals 165 So. Satellite Road South Windsor, CT 06074 From: Jeffrey H.Folger—Environmental Planner/Conservation Officer Date: November 19 2003 Re: App. #03-83P -Review of the proposed Berry Patch II Elderly housing complex—Plans dated 11/04/03. I have reviewed the proposed plan with the following additional comments: Based on a field review I have determined that the proposed construction of the road and associated grading on the eastern portion of the north site will occur within five feet of the stream channel of Farm Brook. The stream channel is not represented on the proposed site plan. The stream channel in this area consists of a gravel bottom with a high potential of harboring benthic macroinvertibrates. This characteristic makes this portion of the watercourse highly valuable and especially sensitive to urban development. I am recommending that all proposed development excluded from at least 40 feet from the watercourse in this area. Furthermore,the 40 foot buffer area should be left to naturalize and form a vegetated riparian zone to protect the watercourse. CC. Town Engineer Director of Planning j REMA ecological MEMORANDUM To: Marcia Banach, Director of Planning Jeff Folger, Environmental Planner so From: Jeffrey B. Doolittle, P.E., Town Engineer c/ Date: 12/3/03 RE: App 03-83P, Berry Patch II Site Development Plan I have reviewed the plans for the Berry Patch II Site Development Plan and I have the following comments about these plans. Please call me(x 245)if you have any questions. 1. Show a curtain drain around the uphill(south)side of the driveway on Sheet 4A. 2. Please name the roads in these new sections. 3. Label the contour in the rear access drive to the Village at Buckland Court. 4. Label the dumpster pads on sheet 4B 5. The sanitary sewer lateral from building 6 does not go to the proposed sanitary sewer. 6. Show the stream channel on the Katten Property 7. Check the grades of the driveways around the units. These grades should be kept as low as possible, especially on the curves. The 10% grade from Sta 30+50 to Sta 33 is too steep for the curves and main access drive to these units. Also it looks like it is greater than 10% on sheet 4B plan view. Show the grading of the intersection by Sta 32+23 and Sta 44+40 where two 10% slopes meet. How will this work. 8. Check the grades by the parking spaces as they should not have a cross slope greater than 5% because it is difficult to keep them clear of ice and the slope makes it difficult to get into and out of vehicles. Also, the handicap spaces can not have a grade greater than 2% in any direction. The grades look too steep in the parking spaces in the areas of Sta 1+50, 3+50, 7+75, 11+50, 33+00, 35+50, 40+75, 43+50, 51+00, and 54+75. 9. The grade change at Sta 9+25 and 9+75 are too close together. Suggest this be eliminated and the driveway grade be changed to a constant slope from Sta 9+00 to Sta 11+00. 10. Is the construction sequence on Sheet 10 representative of the planned construction sequence for this development? This is different from the way Berry Patch is being constructed. 11. Add a note on detail sheet 11 by the Reinforced Retaining Wall Section—Prior to construction of the retaining wall, a plan approved and stamped by a Professional Engineer licensed in Connecticut shall be submitted to the Town Engineering Department. 12. The pavement cross section detail shows a constant 2% cross slope(superelevated). This does not agree with the CB TF elevations that are the same on different sides of the pavement. The pavement should have a crowned cross section because of the steep slopes. 13. Show a detail for the median in the driveway from about Sta 30+50 to Sta 31+90 14. What is the TF elevation for the outlet structure from the detention basin? 15. The detention basin needs to have an emergency overflow spillway. 16. Show the roof leaders from the buildings on sheet 4A and the center of building 6 on sheet 4B. 17. The pipes from YD1 to CB 1 and CB 2 to CB 3 need to be changed to Class V RCP as the slope is 10%or greater. Any other pipes with slopes of 10% or greater need to be Class V RCP. 18. 1 have reviewed the drainage report that was submitted and I have many questions. My biggest concern is with the rationale of using detention from one property to account for an increase in runoff from another separate property and how this was calculated. It must be shown that there are no deleterious downstream effects from this development. This includes no increase in the peak flow downstream, the ability of the existing culverts at Buckland Road, Deming Street, and Clark Street to handle the flow, and no increase in erosion or sediment transport downstream due to this development. I think the Katten property has potentially highly erodable soils in and around the stream channel. There is presently significant amounts of sediment deposited in the culvert under Bucldand Road and further downstream. The drainage report and designs need to be revised to show that there is no deleterious downstream impacts from this development. 19. 1 also have questions about details in the drainage report including the developed and impervious area used, how CN and Tc were figured, why the 10 yr flow calculated for the drainage pipe design is 19-23% greater than the peak runoff calculated using the TR-55 method, where all the roofs drain,and others. 20. The drainage report needs to include a gutter flow analysis for the placement of the catch basins and a headwater analysis for the system. 21. Infiltration needs to be considered for the roof runoff from these buildings. 22. Soils information needs to be included for these sites. 23. A 4 foot fence needs to be installed along the top of all retaining or stone walls with a drop over 4 feet 24. The sidewalks should be moved away from the driveways and parking areas to provide at least a 4 foot snow shelf along the driveways and a 2-3 foot shelf for car bumpers by the parking areas. 25. The sidewalks need to be designed so the grades are less than 8%(ADA requirement). 26. Continuous stone walls between buildings 8 & 6 and 9 & 10 on the south side would help alleviate some of the grading problems with the sidewalks. 27. Show HC ramps and crosswalks where the sidewalk from the Berry Patch I connect to the units on the Calvary Church property. 28. There also need to be sidewalks connecting Berry Patch I to the units on the Katten property and ramps and crosswalks between units 7 and 6/8. 29. Where are the topsoil piles to be located? I could not find these on the plans. 30. Is all of Berry Patch II to have BCLC? I could not find this labeled on the plans. 31. These sites are extremely tight which make them difficult to construct and may compromise circulation for vehicles and pedestrians. 32. The manholes along the cross country sewer line need to have watertight covers and frames with gaskets and locking screws. Include this detail in the plans. 33. WPCA approval is needed for this project. A`<Cw N at v `� * � _0 O-P s-0� ?d&U&01t s � 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CT 06074 soR.co TELEPHONE (860) 644-2511 To: Design Professionals 165 So. Satellite Road South Windsor, CT 06074 From: Jeffrey H. Folger—Environmental Planner/Conservation Officer Date: December 5 2003 Re: App. #03-83P -Review of the proposed Berry Patch II Elderly housing complex—Plans dated 12/04/03. I have reviewed the proposed revised plan with the following comments still outstanding: The bed composition for the proposed Swale and detention basin should include a soil amendment of leaf compost 30%by volume. This needs to be added to the plans Gravel check dams should be placed between the proposed foundations to further slow the runoff velocities travelling downhill during construction. Please refer to the 2002-CT E&S Guidelines for specifications. Please demonstrate that you will achieve at least a ten-minute residence time within the proposed drainage swales. The swales appear to be undersized to accomplish this. Please use the 90% storm occurrence as your benchmark. That should correspond to the 1.25" storm event. Please provide estimated velocities for flow through the swales. Please include sediment sumps within the proposed detention basin and biofilter swales sized to hold the estimated annual sediment load. The southern detention basin has a sump included in the plans,however the storage in the northern swales appears to be limited. Please provide an estimated volume of road sand that would be generated by winter sanding and miscellaneous sediment throughout the year. Please add silt fence to the toe of proposed cuts and fills. This will prevent exposed soil on those slopes from impacting stormwater swales and roadbeds prior to stabilization. The detail of the temporary sediment basin adjacent to the catchbasin shows a 90-degree riser within the basin. Please show the connection to the catchbasin in the detail. An anti-tracking pad should be installed where construction traffic will be entering the northern site from the current site. cc, Town Engineer Director of Planning MEMORANDUM To: Marcia Banach, Director of Planning Jeff Folger, Environmental Planner RECEIVED IWA/CC Members DEC 17 2003 From: Jeffrey B. Doolittle, P.E., Town Engineer e South Windsor Date: 12/17/03 INLAND WETLANDS AGENCY CONSERVATION COMMISSION RE: App 03-83P, Berry Patch II Site Development Plan I have received a revised drainage design and revised calculations for the Berry Patch II Site Development Plan. The drainage design for the Katten parcel now includes a detention basin as well as a water quality swale. The calculations show that this system will reduce the developed peak runoff to below existing pre-development rates for all storm events ranging from 2 year to 100 year from the Katten parcel. The Calvary parcel still includes a large detention/infiltration basin and the peak runoff from this parcel will also be reduced for all storm events, as a result of the proposed drainage design. The revised drainage calculations also address other questions I had concerning the details of these drainage calculations. In summary, the revised drainage calculations and design satisfy my previous concerns about the stormwater flows from this proposed development. Please call me(x 245)if you have any questions. NOV-24-2003 09:57 FROM-Metro Realty +0606776919 T-556 P.002/002 F-213 Pastor K.L. Gustafson Calvary Chruucb 400 Bucklmd Road ,South Windsor, Connecdait 0607-1 Telephone 1860) 644.1102 - November_18, 2003 Ms. Marcia Banach Town Planner Town of South Windsor 1540 Sullivan.Avenue South Windsor, CT 06074 Dear Ms. Banach: Please be advised that Peter DeMallie of Design Professionals, Inc., is hereby authorized to signn on my behalf, for the Metro Realty Group Senior Housing proposal (also Imown as Berry Patch Expansion), all applications including but not limited to (1) Site Plan Approval, (2) Special Exception, (3) Inland Wetlands, (4) Water Pollution Control Authority, and(5) any other regulatory authority having jurisdiction over the Berry Patch expansion proposal_ Very truly yours, By: Pastor K.L. tafson NOV-19-2003 11:12 FROM-Metro Realty +8606776919 T-487 P-002/002 F-050 r Fred Katten 115 Beverly Road West Hartford,Ct. November 3, 2003 Ms. Marcia Banak Town Planner Town of South Windsor 1540 Sullivan Avenue South Windsor, Ct. 06074 Dear Ms.Banalc_ Please be advised that Peter DeMallie of Design Professionals, Inc., is hereby authorized to sign on my behalf, for the Metro Realty Group Senior Housing proposal(also known as Henry Patch Expansion), all applications including but not limited to (1) Site Plan Approval, (2) Special Exception, (3) Inland Wetlands, (4)Water Pollution Control Authority,and(5) any other regulatory authority having jurisdiction over the Berry Patch expansion proposal. Very truly yours, Fred Katten �0wN � V&U&ot 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CT 06074 ��OsoR.coN�w TELEPHONE(860) 644-2511 To: Design Professionals 165 So. Satellite Road South Windsor, CT 06074 From: Jeffrey H. Folger-Environmental Planner/Conservation Officer Date: November 13 2003 Re: App.403=83P -Review of the proposed Berry Patch II Elderly housing complex-Plans dated 11/04/03. I have reviewed the proposed plan with the following additional comments: Proposed catch basins should have 4-foot sumps incorporated to maximize sediment retention prior to the detention basin. Trap hoods should be installed-on all catchbasins receiving runoff from asphalt. The bed composition for the proposed swale and detention basin should include a soil amendment of leaf compost 30%by volume. -The stream channel should be accurately shown on:the plans. A soil report has not been received showing soil types present on the site. This should include both.upland and hydric soil types. A report on the wetland,functions and values should be submitted evaluating the project's - potential impacts to wetland function and water quality. The revised plan shows temporary sediment basins installed next to catchbasins. Grading is not shown that would divert runoff to these areas. A phasing plan of earth moving activities has not been submitted. The majority of the site is proposed to be disturbed to accommodate the construction of the dwelling units and parking lots. Perimeter erosion controls-on.the northern_side of the site will have to be reinforced to provide maximum protection to the adjacent wetland areas. Interior erosion controls are needed, with detailed phasing of earth moving included. This should include the establishment of earthen - berms;and temporary sediment basins to intercept sediment-laden runoff from the site. Gravel check dams should be placed between the proposed foundations to further slow the runoff velocities travelling downhill. Please refer to the 2002-CT E&S Guidelines for specifications. A review of the Hartford County Soil Survey shows the soil type occurring on the southern site as Narragansett Silt Loam. Please provide test pit data to determine if infiltration of roof runoff is possible. The 100-year flood elevation should be shown in the area to be excavated in the northwest portion of the site. Please demonstrate that you will achieve at least a ten-minute residence time within the proposed drainage swales. Please include sediment sumps within the proposed detention basin and biofilter swales sized to hold the estimated annual sediment load. Add silt fence to the toe of proposed cuts. The detail of the temporary sediment basin adjacent to the catchbasin shows a 90-degree riser within the basin. Where does the riser empty? An anti-tracking pad should be installed wherever you will be entering the original Berry Patch site,as well as the northern Buckland Road site. Please show the woody vegetation boundary on the E&S sheets. A note should be included within the E&S narrative that any area proposed to be left open for more than 30 days should receive a temporary seeding. CC. Town Engineer Director of Planning REMA ecological t T , VEGETATION MANAGEMENT PLAN for the Conservation Easement of Berry Patch II (Katten Site) South Windsor, Connecticut INTRODUCTION The REMA Ecological Services, LLC, Environmental Assessment dated November 20h, 2003 provides the baseline vegetation data needed for a long-term vegetation management plan for the non-forested portions of the Conservation Easement at Berry Patch II. This plan will include the following components: ➢ Maintain existing, diverse wet meadow and meadow cover types by mowing. ➢ Control the major infestation of multiflora rose, an invasive shrub, at the western end of the site and along fencelines with a combination of cutting (brushhogging) and follow-up foliar herbicide application. ➢ Remove Japanese barberry from forest edges by hand-pulling or using a weed wrench;numbers are low to moderate. ➢ Eliminate the small, dense purple loosestrife infestation at the outlet of Farm Brooh, preventing its spread to other wetland areas on the site, and downstream. ➢ Prevent invasive shrub species from colonizing the woody planting areas (buffer enhancement) by mulching the soil around shrub plantings and weeding invasive seedlings. ➢ Minimize impacts on wildlife utilization and wetlands soils and habitats by careful timing of management activities. The invasive plant control techniques described below are drawn from fact sheets produced by the Integrated Pest Management Program at the University of Connecticut and downloadable from the website of the Connecticut Invasive Plant Working Group. VEGETATION MANAGEMENT PLAN CONSERVATION EASEMENT BERRY PATCH II (KATTEN SITE), SOUTH WINDSOR, CT Complete fact sheets for control of multiflora rose, barberry, and purple loosestrife are attached to this plan. They describe a variety of control techniques, including herbicide formulations. MOWING MEADOW AREAS This shall be done annually or biennially to prevent colonization by woody seedlings. Because grassland bird species may nest in these areas, no mowing should take place between mid-May and mid-August. To prevent rutting and soil compaction, mowing of wet meadow and moist uplands will be done either when the ground is frozen or during a late summer or early fall dry spell. However, no more than half of the meadow areas on the site will be mowed at a given time, to maintain availability of seeds and cover for wildlife in winter, and availability of nectar and pollen in summer. Year-to-year variation in the mowing timing will help to maintain overall diversity of the meadows. If an opportunity should arise to tether or pen low numbers of grazing animals in the wet meadow area, this would benefit the long-term diversity of the plant community. The unusually high diversity of wet meadow species appears to be related to disturbance of small soil areas by the hooves of livestock, which have served as colonization sites for the less competitive wildflowers and sedges, such as the deep pink swamp milkweed,Asclepias incarnata. These plant species tend to die out or dwindle in the absence of ongoing, minor soil disturbances. Keeping livestock in the conservation area is likely to be impractical, but should be kept in mind as an option, also scenic for motorists viewing the area (Large numbers of animals, of course, lead to overgrazing and excessive trampling.) Use of livestock for vegetation management was a technique under discussion at the recent (September 15th and 16th 2003) Invasive Plant Summit in Hadley, Massachusetts. CONTROL OF MULTIFORA ROSE A large infestation of this species occurs at the eastern end of the western wet meadow, and along the central and western fencerows and woods edges. Control of this infestation will also curtail the spread of this species into the wooded swamp because fruiting occurs primarily in open habitats, although low-density multiflora also grows in shaded areas. A combination of mechanical and chemical control shall be used. As the infestation is partially in wetland and partially in upland soils, procuring a routine CT DEP permit will be Rema Ecological Services, LLC(12/10/03) Page 2 VEGETATION MANAGEMENT PLAN CONSERVATION EASEMENT BERRY PATCH II (KATTEN SITE), SOUTH WINDSOR, CT necessary for herbicide application in wetland areas. This could be done by the licensed applicator that would be hired to do the job. Cutting and mechanically removing the brush with a brushhog in winter when the ground is frozen will minimize soil compaction and rutting. For removal of rose along fencerows a hand-held gas-powered trimmer will also be needed. In early summer, herbicides will be applied to the sprouts, either glyphosate or triclopyr (a much smaller quantity of herbicide will be needed than if full-grown shrubs were sprayed). To avoid missing sprouts of isolated individuals, they will be,flagged at the time of cutting, in winter. Follow-up treatment, after early summer, of limited numbers of surviving sprouts, will be done with triclopyr. The multi-stemmed, thorny growth form of multiflora rose makes it impractical to use the technique of stump painting, recommended for most other invasive shrubs. Because multiflora rose is important for wildlife cover, and of persistent winter fruit winter, the planting plan, which has been prepared by Raymond Jefferson, LLA, includes some replacement shrubs where multiflora rose would be removed. Additionally, seedlings or "liners" of the following native dogwood shrubs (Cornus racemosa and Cornus amomum), winterberries (Ilex verticillata), and bayberries (Myrica pennsylvanica), all with persistent winter fruit, shall be planted in the areas where multiflora rose will be removed. Quantities will be 50 to 60 for each of the aforementioned species. CONTROL OF IAPANESE BARBERRY This species is of minor concern at the site, compared to multiflora rose, but will be removed from fencerows and woods edges, primarily in the western portion of the site. Control shall begin with a systematic walk-though, flagging all individuals found. This species is relatively easy to remove mechanically, or with a weed wrench, without a strong tendency to resprout from root fragments. Initial mechanical removal (without a brushhog) will avoid incidental herbicide impacts to adjacent native plants. For removal of very large individuals, a hand held cutter with follow-up herbicide application will be used, as for multiflora rose. CONTROL OF PURPLE LOOSESTRIFE The small (less than 300 square feet) but dense infestation of purple loosestrife adjacent to the outlet of Farm Brook from the site, will be removed, so that it does not spread into other Rema Ecological Services, LLC (12/10/03) Page 3 VEGETATION MANAGEMENT PLAN CONSERVATION EASEMENT BERRY PATCH II (KATTEN SITE), SOUTH WINDSOR, CT wetland areas and to downstream wetlands. These are very large, mature plants. REMA recommends spraying of patches with RodeoTM formulation of glyphosate in May before plants are 12 inches tall, with follow-up treatments of surviving sprouts and several years of weeding of seedlings that grow from the seedbank. A CT DEP application permit will be needed for this. Biological control is not recommended here, as the area is not large enough to sustain a long-term population of the biological control agents (Galerucella beetles). Small pockets of open water habitat in this location will enhance the wetland system. MANAGEMENT OF BUFFER ENHANCEMENT AREAS Exposed bare soil is an ideal seedbed for invasive plant species. Soil disturbance also brings up existing seeds in the seed bank to the soil surface. However, certain preventive measures can avert new infestations that so often accompany developments. In particular, seedlings of multiflora rose, barberry, Japanese honeysuckle, Asiatic bittersweet, winged Euonymus, and other invasives are likely to colonize the buffer planting areas, along with typical agricultural weeds. A combination of heavy mulching (three inches) of a three-foot diameter circle around plantings, and systematic weeding of aggressive competitors, three times a growing season, for the first two years, will allow buffer plantings that are proposed in these areas to thrive, assuming they are watered, as necessary and protected from herbivores. Watering of these buffer plantings is necessary during dry spells, especially during the first growing season. An irrigation plan should be in place and ready from prompt activation, at the time plantings area installed. If deer herbivory is a problem, protective chicken wire mesh cages shall be installed around shrubs. Systematic weeding of invasive seedlings will also be done in other wetland setback areas with disturbed soil (e.g. stormwater management swales or graded areas) in mid to late summer, for two years following construction. The person doing the weeding should know how to identify seedlings of these species, should be either a qualified plant ecologist, or trained by someone who has these identification skills. Native volunteer seedlings should be allowed to remain along forest edges and fencerows. Once established, the native plantings and volunteers will create shade and reduce colonization by invasives. Remo Ecological Services, LLC(12/10/03) Page 4 VEGETATION MANAGEMENT PLAN CONSERVATION EASEMENT BERRY PATCH II (KATTEN SITE), SOUTH WIND50R, CT CONCLUSION This vegetation management plan will maintain, and enhance, the habitat and aesthetic values associated with the former agricultural land use, control infestations of three problem invasive species, and allow the buffer plantings areas to develop as intended. Rema Ecological Services, LLC(12/10/03) Page 5 Purple LOOsestrife (Lythrum salicaria) Purple loosestrife is a wetland perennial native to Eurasia that forms large, monotypic stands throughout the temperate regions of the U.S. and Canada. It has a vigorous rootstock that serves as a storage organ, providing resources for growth in spring and regrowth if the plant has been damaged from cuttings. New stems emerge from the perennial roots enabling the plant to establish dense stands within a few years. Seedling densities can approach 10,000-20,000 plants/m2 with growth rates exceeding 1 cm/day. A single, mature plant can produce more than 2.5 million seeds annually which can remain viable after 20 months of submergence in water. In addition, plant fragments produced by animals and mechanical clipping can contribute to the spread of purple loosestrife through rivers and lakes. Management Options A. Hand Pulling/ Grubbing: In small populations, younger plants (1-2 years old) can be pulled by hand. Plants more than 2 years old should be dug out with special care to include the entire rootstock. Use of tools, such as a Weed Wrench, on plants once they have developed a woody cane can be an effective way to remove this rootstock. Plants should be removed before flowering to ensure that seeds are not dispersed during the disturbance. All plant parts should be carefully bagged, removed from the site, and placed in approved landfills or preferably burned to prevent escape to other non-infested sites. In addition, clothing, boots, and equipment should be properly cleaned to ensure that no seeds are transported. Follow-up treatments of sites are recommended for 3 years to eliminate re- sprouts from fragments left behind. B. Cutting: Hand tools may be used to cut plants, particularly younger plants (1-2 years old) which have not yet developed woody stems. Since these tools mow the plants and leave the root structures intact, repeated cuttings may be necessary over the course of a growing season. All plant parts should be removed immediately from the site and properly disposed of. Once severed, stems are buoyant and may disperse to other areas and re-sprout. Purple loosestrife produces a huge volume of seeds that contribute to the seedbank in the soil. In areas where this plant is expanding and removal is not feasible, cutting the flowers off with common garden clippers or shears can dramatically slow the spread of seeds. Again, all plant parts that are cut should be bagged and removed from the site to prevent re-sprouting. C. Mowing: Mowing is not recommended for purple loosestrife because it can further spread the species by distributing plant stems that will sprout vegetatively. If feasible, native plants should be restored to the control area by seeding or planting. This re-establishment of vegetation will deter new loosestrife seedling development. D. Biological Controls: Several insects that feed specifically on purple loosestrife in Europe have undergone intensive laboratory and field tests in the U.S. To date four insects have been approved for release in Connecticut. Two leaf-eating beetles, Galerucella calmariensis and G. pusilla defoliate purple loosestrife, leaving behind dried out skeleton of the leaves. By defoliating large portions of the plant, these beetles impact the plant's ability to photosynthesize. This type of stress reduces the plant's ability to store reserves for overwintering and limits its capacity to form flowers. Beginning in 1996, Donna Ellis at the University of Connecticut has released Galerucella beetles at several study sites in Connecticut as part of a long-term research project. The beetles are causing extensive feeding damage to purple loosestrife at the release sites, and they have been overwintering and reproducing successfully. Hylobius transversovittatus is a weevil that attacks the entire plant. Adults feed on aboveground portions of purple loosestrife, while the larvae attack the roots and crown of the plant. By attacking the rootstock, Hylobius weevil larvae affect nutritional uptake and the plant's ability to overwinter and survive during stressful conditions. Another weevil, Nanophyes marmoratus, attacks the flowers of purple loosestrife. Upon emerging, overwintering adults move to young plants and feed on the newly developing leaves. After flowering is initiated the adults move to the flower spike and feed on the opened flowers located on the bottom of the spike. Adults feed exclusively on the flowers. Long-term effects should be significant since feeding action and oviposition prevent normal flower development thereby limiting seed production. For more information about biological control of purple loosestrife, contact: Donna Ellis Dept. of Plant Science, Box U4067 University of Connecticut, Storrs, CT 06269 Tel: (860) 486-6448 Email: dellis canr.uconn.edu E. Herbicides: In dense, monotypic stands of purple loosestrife, spray loosestrife seedlings before they reach 12" tall with glyphosate. For established loosestrife growing from perennial rootstocks, spray glyphosate when loosestrife is actively growing from full flowering to just after flowering (late summer to early fall, before frost). Use Rodeo formulation if loosestrife is growing in standing water or if spray will contact water. ROUNDUP [glyphosate (41%)]: 2.5 fl. oz./gal RODEO [glyphosate (53.8%)]: 2 fl. oz./gal References Heidorn, R. and B. Anderson. 1991. Vegetation management guideline: Purple Loosestrife (Lythrum salicaria L.). Natural Areas Journal 11(3) 172-173. Malecki, R.A. and Rawinski T.J. 1985. New methods for controlling purple loosestrife (Lythrum salicaria). New York Fish and Game Journal 32(1) 9-19. Noxious and Nuisance Plant Information System, Version 4.0. Tennessee Exotic Plant Management Manual, April 1997. Fact sheet reformatted from the Invasive Plant Management Guide on the web site of the Connecticut Invasive Plant Working Group (CIPWG) at http://www.hort.uconn.edu/cipwg/ University of Connecticut INTEGRATED PEST MANAGEMENT Japanese Barberry (Berberis thunbergii) Japanese barberry is multi-branched dense shrub that can grow to 2.5 m (8 ft) in height. Shiny green to burgundy leaves are alternate along its thorny stems. Solitary yellow flowers bloom from March to April, and the fruit is a round or elliptical red berry. Japanese barberry is a popular landscape shrub that has escaped into many natural areas, and can grow in dense thickets in the understory of woods and forests. It is a prolific seed producer, and numerous birds eat and subsequently disperse the seeds. Management Options A. Pulling by hand or weed wrench: Hand pulling can effectively control small populations of Japanese barberry, since it can be done during most of the year and plants pull up easily in most forested habitats. To avoid injury from the sharp spines, heavy gloves and long-sleeved shirt are recommended. Barberry breaks bud early in the spring, thus it is easy to see in springtime before other deciduous plants leaf out. If plants have fruit present, they should be bagged and disposed of to prevent seed dispersal. Care should be taken to minimize soil disturbance. If lacking berries, uprooted shrubs can be piled and left as cover for small animals. For larger shrubs, a weed wrench provides the necessary leverage to pull up the plant by its roots and also minimizes contact with the thorny stems. B. Mowing/Cutting: Repeated mowing or cutting will control the spread of Japanese barberry but will not eradicate it. Stems should be cut at least once per growing season as close to ground level as possible. Hand cutting of established clumps is difficult and time consuming due to the prolific thorns. C. Herbicides: Japanese barberry breaks bud earlier in the spring than most woody species. Thus, it is possible to selectively spray its young leaves before other woody species have produced leaves. For such early season treatments, triclopyr is usually more effective than glyphosate. Wait until significant leaf expansion to ensure sufficient absorption of triclopyr. From mid summer to fall, both glyphosate and triclopyr are effective when applied as foliar sprays or as cut stump treatments. ROUNDUP [glyphosate (41%)]: Foliar spray: 2 fl. oz./gal Cut-stump treatment: Diluted with equal part water (1:1) BRUSH-B-GON [triclopyr (8%)]: Foliar spray: 4 fl. oz./gal Cut-stump treatment: Undiluted Fact sheet reformatted from the Invasive Plant Management Guide on the web site of the Connecticut Invasive Plant Working Group (CIPWG) at http://www.hort.uconn.edu/cipwq/ University of Connecticut i' INTEGRATED PEST MANAGEMENT Multiflora Rose (Rosa multiflora) Multiflora rose is a large, dense shrub that has escaped from ornamental and conservation plantings to become a serious invasive plant problem across the eastern half of the U.S. It invades natural areas, pastures, and light gaps in forests. Multiflora rose produces abundant small white flowers in the spring. Birds and mammals consume the red fruits, called hips, and may disperse them long distances. The majority of plants develop from seeds in the soil, which may remain viable for 10 to 20 years. It may also spread vegetatively when tips of arching branches touch the ground and develop roots (called layering), and from plants that emerge from shallow roots. Plants grow slowly for the first one or two years followed by rapid expansion through layering and root sprouts. Multiflora rose spreads quickly and may grow 1 to 2 feet per week to form impenetrable thickets of thorny stems. Management Options A. Grubbing: Pulling, grubbing, or removing individual plants is effective when plants are small. Use a digging tool to remove the entire plant. Special care should be taken to ensure that all roots are removed to prevent their resprouting. If plants develop from severed roots these should be removed as well. B. Cutting: This method is also appropriate for small initial populations and for environmentally sensitive areas where herbicides cannot be used. Repeated cutting will control the spread of multiflora rose, but will not eradicate it. Stems should be cut at least once per growing season as close to ground level as possible. Hand cutting of established clumps is difficult and time consuming due to the long arching stems and prolific thorns. C. Mowing: For disturbed areas containing large populations of multiflora rose, mowing of large bushes can provide partial control, by restricting top growth and spread. Research indicates that mowing three to six times a year can be effective. The objective of a mowing program is to clear the existing vegetation and reduce the reproductive capability of the below ground portions of the shrubs. As such, this is only a practical option in infested areas such as pastures where mowing equipment can operate. Mowing can also be somewhat effective in protecting a field or pasture from encroaching infestations on adjoining properties. Repeatedly mowing the perimeter of a site to block this type of expansion can be somewhat effective in preventing the spread of multiflora rose. In many cases where this weed is present, mechanical methods will not be an option, and chemical control options should be considered. D. Herbicides: Multiflora rose is susceptible to both glyphosate and triclopyr. Triclopyr can be applied starting in spring before or during flowering. Glyphosate is most effective when applied after flowering (early summer) until early fall. Cut-stump treatments with both herbicides also provide control, but cutting stumps in established thickets is very difficult because of the numerous thorny branches. ROUNDUP [glyphosate (41%)]: Foliar spray: 1.5 fl. oz./gal Cut-stump treatment: Diluted with equal part water (1:1) BRUSH-B-GON [triclopyr (8%)]: Foliar spray: 4 fl. oz./gal Cut-stump treatment: Undiluted References Ahrens, J. F. 1979. Chemical control of multiflora rose. Proceedings, Northeastern Weed Sci. Soc. 33:213-217. Kay, S. H., W. M. Lewis, and K. A. Langeland. 1995. Integrated management of multiflora rose in North Carolina. North Carolina Cooperative Extension Service. 17 p. Noxious and Nuisance Plant Information System, Version 4.0. Szafoni, R.E. 1991. Vegetation Management Guideline: Multiflora Rose (Rosa multiflora Thunb.). Natural Areas Journal 11(4): 215-216. Tennessee Exotic Plant Management Manual, April 1997. Fact sheet reformatted from the Invasive Plant Management Guide on the web site of the Connecticut Invasive Plant Working Group (CIPWG) at h ttp://Www.hort.uconn.ed u/cip wg/ University of Connecticut a INTE&RATED PEST MANAGEMENT ! -�p%NN Sf4 aO-P Sot� V&U&ot s 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CONN. 06074 SOR.co��,�v AREA CODE 860/644-2511 To: Design Professionals 165 So. Satellite Road South Windsor, CT 06074 From: Jeffrey H.Folger—Environmental Planner/Conservation Officer Date: November 19 2003 Re: App. #03-83P -Review of the proposed Berry Patch II Elderly housing complex—Plans dated 11/04/03. I have reviewed the proposed plan with the following additional comments: Based on a field review I have determined that the proposed construction of the road and associated grading on the eastern portion of the north site will occur within five feet of the stream channel of Farm Brook. The stream channel is not represented on the proposed site plan. The stream channel in this area consists of a gravel bottom with a high potential of harboring benthic macroinvertibrates. This cha racteristic c make h's this portion highly valuable of the watercourse hi p a uable and especially sensitive to urban development. I am recommending that all proposed development excluded from at least 40 feet from the watercourse in this area. Furthermore, the 40 foot buffer area should be left to naturalize and form a vegetated riparian zone to protect the watercourse. CC. Town Engineer Director of Planning REMA ecological MUM 6 ENVIRONMENTAL ASSESSMENT ' submitted to the NOI/ 2620 03 'j4L�oouth Windsor ' WZQMD TOWN OF SOUTH WINDSOR CONSERAroNCo6-AG MMIS SoN INLAND WETLANDS AND WATERCOURSES AGENCY with an APPLICATION FOR A PERMIT TO CONDUCT REGULATED ACTIVITIES ' addressing WETLANDS,WILDLIFE &WATER QUALITY ' for the ' PROPOSED BERRY PATCH II BUCKLAND ROAD, SOUTH WINDSOR, CONNECTICUT ' prepared by Rema Ecological Services, LLC ' 164 East Center Street Manchester, Connecticut (860) 649-REMA(7362) ' (860)-647-8397(fax) tNovember 261h,2003 ' Report Preparers: s � . ' George T.Logan, , CPWS Principal Environmental Scientist ' Sigrun N. Gadwa,MS Principal Ecologist 1 Electronic File:g:12003jobs103795SWN540erryPatch-EAlb-Final.doc Envirnomental Assessment i Berry Patch H,South Windsor, CT November 26,2003 ' Table of Contents ' 1.0 EXECUTIVE SUMMARY.....................................................................................1 2.0 INTRODUCTIONAND OVERVIEW................................................................4 3.0 EXISTING CONDITIONS....................................................................................9 3.1 GEOLOGY, SOILS& WETLAND DELINEATIONS.....................................................9 3.2 VEGETATION AND WILDLIFE IIABITAT......................................................................10 3.2.1 Regional Context...................................................................................................................10 ' 3.2.2 Vegetative Cover Types at the Site................................................................................13 4.0 WETLAND FUNCTIONS AND VALUES......................................................24 ' 5.0 REVIEW OF LISTED SPECIES AND CRITICAL HABITATS............27 6.0 WILDLIFE UTILIZA TION A T THE SITE...................................................27 ' 6.1 INTRODUCTION................................................................................................................27 6.1.1 Results......................................................................................................................................28 ' 7.0 IMPACTS AND MITIGATION.........................................................................30 7.1 INTRODUCTION................................................................................................................30 7.2 INDIRECT WETLAND AND WATERCOURSE IMPACTS.........................................31 7.3 IMPACTS UPON WETLAND FUNCTIONS AND VALUES.........................................32 7.4 CONCEPTUAL WETLAND BUFFER PLANTINGS PLAN.........................................32 7.5 STORMWATER MANAGEMENT: QUALITY..............................................................34 ' 7.5.1 Design Objectives................................................................................................................34 7.5.2 Structural BMPs...................................................................................................................35 ' 8.0 REFERENCES........................................................................................................38 ' 03795SWN54\BeryFar2-EA1b-Final.DOC Envirnomental Assessment Berry Patch H,South Windsor, CT ' November 26,2003 ' List of Figures Figure Page 1. Site Locus (USGS Topo) ............................................................................................ 5 2. Aerial Photograph of Site............................................................................................ 7 i � List of Tables ' Table Page 1 1. Dominant Vegetative Cover Types within Study Area............................................... 13 2. Wetlands Functional Assessment Summary............................................................... 26 Appendices ' Appendix Following Page 1. Annotated Photographs............................................................................................... 39 2. Wildlife Inventory....................................................................................................... 39 2. Wetland Characterization& Classification................................................................. 39 4. Rationale for Wetland Functional Assessment(Golet Model Only) .......................... 39 ' 03795SWN54\BeryFar2-EA1b-Final.DOC H Envirnomental Assessment ' Berry Patch H,South Windsor, CT November 26,2003 1. 0 EXECUTIVE SUMMARY I ♦ Uplands on the site are predominantly farmland, active until very recently: ' pastureland and barnyard pens bordered by strips of formerly grazed field. Scrub shrub and forest vegetation occupy field edges, which closely track the boundaries of the forested wetland system associated with Farm Brook and its tributaries. A paved driveway, lawn, and bare soil with sparse barnyard weeds occur in the vicinity of the barn and the garage at the far western end of the site. ♦ Wetland vegetative communities are all associated with Farm Brook, a southwest- flowing tributary of the Podunk River. Forested cover types border the streams that converge in this broad, low-lying floodplain. Wet meadow occupies a portion ' of the northwestern pasture, and the brook flows through wet meadow, shallow emergent marsh, and shrub thickets before exiting the site and passing under Buckland Road. ♦ The single, predominately forested wetland ecological unit, with 1.59 acres on site, extends to the north, east and southeast of the subject site. It is estimated to be roughly 16.5 acres in size. It provides moderate quality wetland functions and values. ♦ A medium-intensity floristic inventory was conducted on the site. No Connecticut-listed higher plants (i.e. Endangered, Threatened and Special Concern) were observed. Plant species diversity is relatively high in the wetlands, but is reduced by infestations of invasive plant species, especially of multiflora rose. ♦ A low-intensity wildlife inventory resulted in observation of 46 wildlife species (i.e. avians, herptiles and mammals), while 91 probably breed on the property or utilize it on regular basis. None of these species were found to be "Connecticut- listed." ' 03795SWN54\BerryFar2-EA1b-Final.DOC 1 AFTM Envirnomental Assessment Berry Patch H,South Windsor, CT November 26,2003 ' ♦ Characterization of in-stream habitat and sampling of several water quality parameters show that stream channel morphology and water quality are somewhat impaired within the Farm Brook stream system, especially the northeastern feeder stream that receives runoff from Oakland Road(Route 30). ' ♦ Direct, but non-permanent, 0.03-acre wetland alteration or impact will occur as a ' result of the sewer connection for the proposed project, to be restored to a wet meadow post-construction. I ♦ Indirect long-term impacts to wetland and watercourse functions and values are expected to be of low intensity,particularly in the post-construction phase. ♦ The 2.31 acres of activities that are proposed within the regulated 80-foot setback (i.e. "upland review area") will take place entirely within upland field areas or in highly disturbed areas near the western barn. Of this, after grading, most will be restored to a naturally vegetated condition. Extensive plantings within the setback areas with an existing pasture cover type will also help to provide screening and wildlife habitat,mitigating for indirect wetlands impacts. ♦ Indirect short-term impacts on watercourses will be minimized by the 45-foot minimum watercourse setback to the proposed grading, to be maintained throughout the site. ♦ Many Structural Best Management Practices (BMPs) are incorporated into the plans. These include several catch basins, some of which will have snouts or hooded outlets, vegetated water quality infiltration swales, and two shallow water Iquality biofiltration basins. ♦ Many Procedural Best Management Practices (BMPs) are proposed or recommended. These include scheduled sweeping of roadway and parking lot surfaces; inspection,maintenance and cleaning of catch basins, and others. 03795SW N54\BerryFar2-EA1 b-Final.DOC 2 Envirnomental Assessment Berry Patch II,South Windsor, CT November 26,2003 ' ♦ The proposed Stormwater Management System will remove in excess of 80% of total suspended solids (TSS) from runoff from proposed impervious surfaces. This level of overall performance will exceed the State and Federal guidelines for sediment removal in new development. The proposed BMPs will prevent ' degradation of downstream surface waters, specifically ti.ose associated with Farm Brook. I ' 03795SW N54\BenyFar2-EA1 b-Final.DOC 3 AFTM Envirnomental Assessment Berry Patch H,South Windsor, CT ' ' November 26,2003 ' 2.0 INTRODUCTION AND OVERVIEW ' REMA ECOLOGICAL SERVICES, LLC (REMA) has prepared this Environmental Assessment for The Metro Realty Group, LTD ("the owner and co-applicant") for submission to the ' Town of South Windsor Inland Wetlands and Watercourses Agency ("the Commission"). This application to the Commission is being filed pursuant to the Connecticut Inland Wetlands and Watercourses Act (Section 22a-36 to 22a-45), as amended, of the Connecticut General Statutes; ("the Act") and to the Inland Wetlands and Watercourses Regulations for the Town of South Windsor. The applicant requests approval from the Commission to construct elderly housing units ' within five building clusters on two separate parcels, with two loop access roadways and infrastructure improvements. The development site is located in South Windsor, Connecticut, southwest of Oakland Street (Route 30) and east of Buckland Road (See Figure 1 for site locus). A similar project, with five building clusters, was permitted in 2002 to the northeast of this proposed project, and is currently under construction. This proposal includes two parcels. The northern section, encompassing 28.12 acres, and ' hereafter referred to as the Katten Farm parcel. The southern section, encompassing 5.28 acres, is not discussed in any detail in the report, since no proposed activities here fall within wetland regulatory review areas, with the possible exception being the stormwater outfall. rThree building clusters are proposed on the northern portion, which includes the Farm Brook floodplain wetlands. Specifically, the applicant is seeking permission from the Commission: (1) To discharge treated storm drainage towards wetlands at two locations; 2 to c out regulated activities within - ( ) arty gu t n the Town of South Windsor's 80 foot `wetland and watercourse buffer"(a.k.a. "upland review areas"); and (3) to construct a sewer line with a crossing over regulated wetlands, resulting in direct, but temporary disturbance. 03795SW N54\BenyFa2-EA1 b-Final.DOC 4 y } g.Z. Ir f_�` �-- � �z` T� r yr, -� �, �!�.��•-� „a', �._... '�{i�, w ��>;� ��4s-e_.1A f�:�ayte{��� •i� :. �,4, Y L •ti -� '� %�� lk s sf 11"tit 'y 4 4$�t�� � ,' � c�-'i�'' '' . } AN I-_2 0 PA 21 f t 7S Y + 1 f by .a 5 tiY . ON AM s � ' �`. �•' � Zt�1, �� � �'�~ r `ems, G. � � ) -2Zer .t �• - t ��v.Y j - -top.. .:f 14 r ■ • '• C 111 r ■ ■r ■ ■ i■ ■ Envirnomental Assessment Berry Patch H,South Windsor, CT t November 26,2003 The northern parcel, that is the "Katten Farm parcel" as a whole encompasses 28.12 acres. Idle upland pastureland occupies most of the east portion of the property. A broad wetland corridor follows its eastern and northern perimeter. Farm Brook enters the east ■ side of the property, and flows approximately 1,100 feet though the property, joined by ' three well-defined tributary streams. The stream passes though mature forested wetland, then bends southwesterly, and flows though shallow marsh, shrub thickets, and wet meadow, before exiting the western end of the property via a large box culvert under Buckland Street. To the northeast the subject property is bordered by residential lots along Oakland Road; to the northwest by residential land buffered by a narrow strip of ' woodland; to the west by Buckland Road, and to the south by The Village at Buckland Court, an elderly housing community. A high proportion (over 75 percent) of the surrounding land within a half-mile has already been developed(see Figure 2). From the site's high point on the southeastern property boundary (124 feet), the property slopes gradually downward (northerly) towards the floodplain, and Farm Brook drops approximately six feet in elevation before exiting the site. The range in elevation from roughly 124 feet to 86 feet, according to the USGS Topographic Quadrangle Map (Manchester Quad) (see Figure 1). The site plans confirm these elevations. Slopes at the property range from moderately sloping on the southern property boundary to nearly flat in the wetlands floodplain. This Environmental Assessment report is based on site investigations, secondary source information, and coordination with the Applicant and with the engineering and site design consultants. The principal goals of this report are to: 1. Describe existing natural resources(i.e. watercourses,wetlands,uplands); 2. assess the overall functional quality of the wetland and watercourse resources at the site; 3. provide a habitat-based inventory of wildlife populations at the site and the immediate vicinity; 4. briefly analyze potential direct or indirect impacts to wetland and watercourse function, wildlife populations and surface water quality; and I 5. briefly discuss proposed mitigative strategies that minimize or compensate for impacts to regulated resources. ' 03795SWN54\BenyFa2-FA1b-Final.DOC 6 s+ Av. . . l �# rk.:'• �, i. •� �' • ' T: r." �• a . '. 1 i f . JJJ Proposed �•�jBucklandRoad, South • • •Showing Wetlands, - -rcourses and Points of Interest JApril 1, 2000 Aerial Photograph . : • Approximate Site Boundary Date: • • • • • • Wetland Boundary(A•• . RES Proposed Vegetative WIN 164 East Center Street,Suite 8 • • c • Manchester,CT 06040 I I ' Envirnomental Assessment Berry Patch ll,South Windsor, CT November 26,2003 The site was inspected on three occasions in 2003. Portions of the site were also inspected in the spring of 2002, in connection with the first Berry Patch application. The following table gives the dates and the purpose for each inspection in 2003, as well as the principal investigator. Date Purpose for Inspections 10/2/03 Baseline inventory George Logan& Sigrun Gadwa 10/25/03 Baseline inventory,wetland characterization Sigrun Gadwa ' 11/22/03 Stream and water quality data collection, Sigrun Gadwa wetland characterization John Ianm, Certified Soil Scientist with Highlands Soils, LLC, conducted soil surveys and wetland delineations on the site in July of 2003. Sigrun Gadwa, Senior Ecologist, conducted botanical surveys and collected wetland-related baseline data. George T. Logan, Certified Professional Wetland Scientist and Wildlife Biologist, conducted habitat- based wildlife inventories and collected water quality data. ' For this report REMA reviewed a set of plans entitled "Berry Farm, The Metro Realty Group, LTD / Special Exception (10 sheets), dated November 4th, 2003, and revised through November 26th, 2003. Design Professionals, Inc. (DPI) of South Windsor prepared these plans. A Landscape Plan (Sheet L-1), prepared by Raymond Jefferson, L.A., was also reviewed. 1 I 03795SW N54\BerryFar2-EA1 b-Final.DOC 8 AFTM Envirnomental Assessment Berry Patch II,South Windsor,CT ' November 26,2003 3.0 EXISTING CONDITIONS 3.1 GEOLOGY, SOILS& WETLAND DELINEATIONS The property is underlain by reddish brown arkose (i.e. brownstone), also known as the Portland Arkose, according to the Geological Map of Connecticut (Rodgers 1985). Bedrock was not found exposed on the site. The Surfzcial Materials Map of Connecticut(Stone et al. 1992) shows one type of deposits on the site, stacked coarse deposits, mostly "sand and gravel overlying sand" with "sand" in the far northwestern corner. "Thin till" deposits border the site to the south, and may extend into its upper, southern section. Stacked coarse deposits are defined as: "Composed of mixtures of gravel and sand within individual layers and as alternating layers. Sand and gravel layers generally range from 25 to 50 gravel particles and from 50 to 75 percent sand particles. Layers are well to poorly sorted; bedding may be distorted and faulted due to postdepositional collapse." Thin glacial till is defined as: "areas where till is less than 10-15 ft thick and including areas of bedrock outcrop where till is absent. Predominately upper till; loose to moderately compact, generally sandy, commonly stony." 1 It should be noted that some alluvial deposits, associated with Farm Brook, could be present on the site, since the Hartford County Soil Survey calls out Limerick and Winooski series soils,both derived from alluvial deposits, in the vicinity of the site. The site's soils were found to be predominantly of undisturbed disturbed nature, with some disturbed soils altered by agricultural landuses. Soils are derived from the types of underlying parent materials or deposits mentioned above, with topsoil development in a loamy wind-blown (i.e. aeolian) capping. According to the Hartford County Soil Survey, the upland-type soils derived from sand and gravel deposits are silt loams belonging to the Enfield (Es) soil series, fine sandy loams belonging to the Merrimack (Mr) soil series, gravelly sandy loams of the Manchester (Mg), sand soil series and, on the north side only, steep, silty soils on Terrace escarpments. Moderately well-drained Winooski silt loam occupies the transitional 03795SW N54\BerryFar2-EA1 b-Final.DOC 9 Envirnomental Assessment Berry Patch H,South Windsor, CT November 26,2003 " tmeadow areas. These a very good agricultural soils due to the combination of fine- textured topsoil with good moisture- and nutrient-holding capacity and rapidly draining, ' coarse-textured subsoil. The wetland-type soils at the site are all silt loams with a sandy- gravelly substratum. The very poorly drained Saco series occupies most of the forested floodplain, with inclusions of the poorly drained Limerick series. Small areas of disturbed soils (Aquents) were noted near the outlet under Buckland Road. Additionally the eastern end of the western field (near Wetland Flag#45) appears to have been excavated based on the abrupt, unnatural transition to upland(see Photo 21; Appendix 1). Wetland resources were delineated in July of 2003 by Mr. John Ianni, a Certified Professional Soil Scientist, pursuant to the State of Connecticut General Statutes (CGS Sections 22a-36 to 22a-45). The criteria used to determine wetland status are the soil ' types designated by the National Cooperative Soils Survey as being poorly drained, very poorly drained, alluvial or floodplain. 3.2 VEGETATION AND WILDLIFE HABITAT ' 3.2.1 Regional Context iThe project area is located in the North-Central Lowlands Ecoregion of the Northern Hills -Central Hardwoods — White Pine Zone (Dowhan and Craig 1976) in the Podunk River Regional Basin, which is part of the Connecticut River Major Basin (Basin Number 4004). An ecoregion is: "An area characterized by a distinctive pattern of landscapes and regional climate as expressed by the vegetation composition and pattern and the presence or absence of certain indicator species and species groups" 1 The North-Central Lowlands Ecoregion is a broad area in the interior of the state consisting of lowlands and extensive floodplains along the major rivers interspersed with prominent north-trending ridge systems. Layers of bedrock of Triassic age are tilted to the east: sedimentary red-brown sandstones and igneous, erosion-resistant, dark basalts. Soils in the uplands have formed on red, clayey glacial till, whereas soils clay in low-lying river valleys are derived from extensive stratified deposits of sand, gravel, silt and some clay. Dominant trees within this ecoregion include oaks, hickories, maples, ashes, black birch, ' 03795SWN54\BenyFa2-EA1b-Final.DOC 10 Envirnomental Assessment Berry Patch II,South Windsor, CT ' November 26,2003 7wilc�o ' and, in abandoned fields, red cedar, white pine, and gray birch. Critical habitats include basalt ridges and sand plains,neither of which occurs at this site. ' From a broader ecosystem perspective, the climax forest community or association in this area of Connecticut is also called "sprout hardwoods" (Braun 1950). There are two reasons this forest community is referred to as "sprout hardwoods." First, most reproduction occurs through sprouting. Second, these forests are dominated by secondary communities of sprout origin. This forest association covers parts of the states of Connecticut, New York, New Jersey, Pennsylvania, and Rhode Island and extends a short 1 distance south of the glacial boundary in New Jersey and eastern Pennsylvania, northward in the Hudson River Valley to beyond Albany, and eastward across southern New England. All of southern and most of central Connecticut is in the "sprout hardwoods" ' forest. A number of forest types occur within the "sprout hardwoods" forest association. The development site and the surrounding area, which includes the Towns of East Hartford, Manchester, East Windsor, Vernon, and other neighboring towns area dominated by the toak-hickory forest type. ' Most of the forest vegetation in Connecticut, particularly in upland areas, has been profoundly modified by agriculture, lumbering, and fire in the earlier historical periods, and by earth removal and urbanization in more recent years. Particularly in this ecoregion, agriculture was initially responsible for extensive losses of natural habitats. Conversion to upland fields has profoundly altered forest cover. Severe and prolonged soil disturbance ' reduces even the potential for regeneration of a diverse forest community because seed banks and the root systems of perennial herbaceous forest species are eliminated (Pickett and White, 1985). However plant diversity has declined less in wetlands, which have generally experienced less soil disturbance than uplands. The forested wetlands at this site retain normal species diversity, although it is somewhat lower in the more recently farmed outer (southern) forest swath. Compare Photo 14 with moderate-size red maples (12 inch to 14 inch diameters) with Photo 15 (Appendix 1), which shows pole-size red maples near the field edge. At this site grazing and periodic mowing have continued to alter plant communities. Wet meadow diversity is actually enhanced as cow hoofs create pockets of bare soil for germination of shorter-lived wildflower and sedge species. However, grazing along field II 03795SW N54\BerryFar2-EA1 b-Final.DOC 11 Envirnomental Assessment ' Berry Patch II,South Windsor, CT November 26,2003 edges has reduced the diversity and density of forest edges and hedgerows, favoring thorny, invasive species. Despite signs of recent presence of cows in the wooded swamp, its vegetation does not appear to have been significantly degraded by years of heavy use by cattle. Most of the species that typically colonize fallow fields and field edges have highly effective seed dispersal mechanisms. At this site they include native species such as black cherries, brambles (Rubus spp), red maples (Acer rubrum), and goldenrods (Solidago spp.), but also invasive species such as multiflora rose, Japanese barberry, and Norway maple (see Photo 3 and Photo 21, Appendix 1). Fast growing invasive plant species now often limit establishment of less vigorous, native species (Denslow, 1985), reducing plant community diversity. At a particular site, forested and non-forested plant communities can be classified into cover types, by considering site characteristics and plant species composition on a scale large enough to integrate minor differences. Whitlock et al. (1994) define a cover type as ' follows: "A portion of a wetland or upland system that contains a uniform plant community composition and structure or that is influenced by one hydrologic regime. A distinct change in either hydrologic or vegetation characteristics indicates a change in cover types." (Emphasis added.) Ecologists traditionally use the cover type approach of ecosystem classification as a rapid ' method of habitat survey. The main assumption of this method is that structural complexity in the vegetation is a key factor influencing the type of fauna that a vegetation community is able to support. Plant community composition and structure depends on ' several inter-related site characteristics, including disturbance history, local seed sources, topography, drainage patterns, and soil type. The following section describes each of the major cover types at this site. Annotated photographs of these cover types can be found in Appendix 1. Photos also show key habitat components and some of the dominant plant species. Appendix 2 is an inventory of wildlife species observed and also expected at the site, based on the cover types tobserved on the site or in the site vicinity. 03795SW N54\BerryFar2-EA1 b-Final.DOC 12 Envirnomental Assessment Berry Patch II,South Windsor, CT l November 26,2003 ' 3.2.2 Vegetative Cover Types at the Site The major vegetative cover types on or adjacent to this development site are summarized in Table 1 using the symbols added to Figure 2, the annotated Flight Year 2000 aerial ' photograph. The symbols for wetlands are the abbreviations for wetland classes, according to the Golet system, defined in Appendix 2. They include four (4) upland cover types, and five (5) wetland cover types, Table 1: Dominant Vegetative Cover Types within Study Area Cover Type Classification Cover Type Designation* Upland Mowed lawn,bare soil, and paved roadways U1 Grazed/mowed meadow U2 Forest edge and moist deciduous woodland U3 Mixed hardwood forest U4 Wetland Deciduous wooded swamp WS Wet meadow M Shallow marsh SM 1 Shrub Swamp SS Open Water OW ' *See Figure 2 ' 3.2.2.1 Uplands Upland (non-wetland) vegetative communities consist of highly altered vegetation (cow ' pasture), with a limited area of more natural vegetation forest and forest edge on the perimeter of the fields. Upland Cover Type U1 is limited to the barnyard and entry area at the western end of the site; it consists of lawn, paved driveway, and the compacted soil of roadways and pens, with sparse natural vegetation (see Photo 22, Appendix 1). Upland Cover Type U2 consists of gently to moderately sloping pastureland where the building clusters are proposed (see Photo 1 and the report cover Photo). Upland Cover Type U3, shown in Photo 2 (among others) consists of forest edge and pockets of early successional "old field" habitat, dominated by shrubs. It is limited in extent, with a combined acreage of less than one acre located on the perimeter of the large eastern pasture as well as the west- central, non-forested area. Narrow strips of moist, deciduous forest in the far northeastern ' 03795SWN54\BeryFar2-EA1b-Final.DOC 13 Envirnomental Assessment Berry Patch II,South Windsor, CT November 26,2003 icorner of the site are close enough to the forest edge that they are included in this cover type (the widest is forty feet).' Plant communities occur on the upland soils described above. I ' Cover Type U4, mixed deciduous upland forest, is in very short supply in the site vicinity; the only area large enough for mapping occurs just offsite,to the east. 3.2.2.1.1 Bare soil, sparse weeds, lawn, and pavement(Ul) 1 This cover type occupies the far western end of the site, with a tidily maintained barnyard and property entry. A garage, barn, driveway bordered by lawn, manure pile, and two cow pens, and a dirt roadway into the fields leave little room for native vegetation. Trees include a red cedar(Juniperus virginiana), and two mature mulberry trees (Morus alba). Bordering the driveway is a linear patch of the clonal invasive shrub species, Japanese knotweed (Polygonum cuspidatum), an invasive semi-woody plant listed as widespread and invasive2, Annual and biennial weeds are present as in any barnyard, including climbing nightshade (Solanum dulcamara)), madder (Galium mollugo), pigweed (Chenopodium alba), and Queen Anne's Lace (Daucus carrota), but they are limited in extent by tidy maintenance practices and past trampling by cows. The manure pile and the cattle pens are located 320-foot upslope of the stream, but without any intervening berm. The broad buffer likely attenuates nutrients effectively during the growing season. However, manure probably has been polluting the stream with excess ' nutrients when the ground is frozen or saturated and when plants are no longer actively growing and taking up nitrogen and dissolved phosphorus. ' The western end of the proposed sewerline will traverse this highly man-altered cover type and the northern portion will be excavated to create flood storage. The barn and garage in this area will be razed. The westernmost of the two mulberry trees (just east of the garage) will be lost, but the eastern tree, a picturesque specimen shown in Photo 22, will likely remain. In this cover type wildlife feed on the abundant mulberry fruit preferred by many bird ' species including mockingbirds, observed in this portion of the site. Barnyard weeds are A variety of forest edge effects extend further than forty feet from the forest edge, including increased light levels, higher wind velocities, a heavier seed rain of wind dispersed and bird dispersed seeds, and higher rates of bird nest predation and.parasitism. 2 This species is listed as widespread and invasive in the List of Non-native invasive and potentially ' 9invasive Vascular Species in Connecticut(Mehrhof et al 2002). 03795SW N54\BenyFar2-FA1 b-Final.DOC 14 Envirnomental Assessment Berry Patch II,South Windsor, CT ' November 26,2003 ' sources of seeds for birds and small rodents; song sparrows were observed feeding at the edge of the barnyard. The replacement flood storage area will be planted with a seed mix ' that includes heavy-seeding species, and fruiting shrubs will be planted, to mitigate for loss of wildlife food sources in this cover type. 3.2.2.1.2 Upland Meadow (Upland Cover Type 2;U2) The large, sloping field that occupies the southern portion of the site (Photos 1 and 23) and the upland portions of the western field (Photo 6) are all managed grassland vegetation, maintained by grazing and occasional mowing. Mowing that took place shortly before the REMA baseline inventory,which removed seed heads,hindered identification of herbaceous species in the large eastern field and flowering stalks. Grass was dense and lush,with a high ' proportion of grasses, including fescues (Festuca spp). Densities of grazing animals had not been higher than the carrying capacity of the land. Grass in the westernmost pasture area, ' adjacent to the pens, was also very short, and appeared heavily grazed. Plantains (Plantago spp.) were very dense in this area; chickweeds (Stellaria spp.) and sorrel (Rumex acetocella) were also noted. Limited areas of upland meadow with moderately well-drained soils are also found on the ' perimeter of the west central field area, both north and south of the stream. These areas had not been recently cut; in addition to grasses dominated by red top (Agrostis spp.),these areas support a variety of species also found in adjacent transitional wetlands, including ' smartweeds (Polygonum spp) and sticktights (Bidens spp.) near the barnyard, and boneset (Eupatoreum perfoliatum), fox tails (Setaria viridis) and small white aster (Aster vimineus), further west,near the proposed sewer line corridor. ' Grass-dominated meadow provides habitat (forage and cover) for the meadow vole and also woodchucks. Voles are a keystone species in the meadow food chain, prey for predators such as red tailed hawks, observed on the site, and also red foxes and great horned owls. ' Several snake species including Northern brown snakes (observed) also forage for small rodents as well as invertebrates in meadow habitats. Flickers and American robins probe for ' beetle grubs and earthworms in meadow soils with relatively short grass; eastern moles feed on the same prey base. 03795SW N54\BerryFar2-EA1 b-Final.DOC 15 Envirnomental Assessment Berry Patch II,South Windsor, CT . ' November 26,2003 . ' 3.2.2.1.3 Meadow-shrub mosaic, and forest edge Mland Cover Type 3, U3) This cover type consists of the edges of the large fields, as they merge into deciduous ' upland forest. Elsewhere, in overgrown portions of the western field, the shrubland cover type abuts a similar wetland cover type. Low-growing woody vegetation is sparser than is ' typical along forest edges in southern New England, except for the dense, southwestern multiflora rose hedgerow and dense barberry patches along the eastern property line. See Photos 2, 3 and 7 (eastern hedgerows) and 21 (southwestern hedgerow) (Appendix 1). Because soils are sandy and largely moderately well-drained, stone walls and nut-bearing ' trees are both lacking at this site; these valuable habitat component are typically associated with forest edge habitat, but are missing at this site, reducing the wildlife habitat support ' function in the adjacent wetlands. Woody debris is also in short supply, because the farm has been tidily maintained. The dominant tree species are red maple (Acer rubrum) and black cherry (Prunus serotina), with occasional specimens of box elder (Acer negundo) and the invasive ' Norway maple (Acer platanoides) on the east side of the site. Tree diameters are generally smaller in the field-edge strips than in the interior of the woodlot, an indicator that the field is now smaller than it had been, except for the southern property line, with some very large and old tree specimens. iAs mentioned above in the discussion of disturbance history, development of a shrub/vine stratum along field edges appears to have been limited by ongoing grazing pressure at this . site, which has favored two thorny invasive species, multiflora rose (Rosa multiflora) and to a lesser extent Japanese barberry (Berberis thunbergii), as well as the thorny native ' brambles (Rubus spp). Blackberries and wild raspberries (Rubus spp.) are especially common along all the upland edges. Multiflora rose has recently developed into a dense thicket at the eastern end of the western field where it has become a significant seed source, further colonizing the adjacent wooded swamp. However, there is negligible bittersweet (Celastrus orbiculatus), although this invasive vine is widespread along field edges in New England. Goldenrod (Solidago spp) is the dominant herbaceous forb, but grows in a strip less than ' four feet wide at most locations. Pokeweed (Phytolacca americana) is less common, but ' 3 The Year 2000 aerial (Figure 2)does not yet show this thicket. ' 03795SWN54\BerryFar2-EAIb-Finai.DOC 16 Envirnomental Assessment Berry Patch II,South Windsor, CT November 26,2003 ' conspicuous. In moderately well-drained soils along the upland forest.edge cover type a variety of facultative wetland species may also be present, including those mentioned above for Upland Cover Type 2, and also Cinnamon fern (Osmunda cinnamomea) pictured in Photo 7 and New York Ironweed, the purple wildflower, Vernonia noveborecensis, shown in Photo S. Wildlife value of this edge upland community is lower than in denser, more diverse examples of forest edge communities,but is still moderate because it includes several food sources available at different times of year, and ample cover. The Rubus brambles have high wildlife value for their summer fruit, as well as some cover value for wildlife such as Eastern cottontails, observed in this cover type. Multiflora rose also provides wildlife cover and persistent winter fruit, although it is undesirable due to its highly invasive properties. Goldenrods and asters are an important pollen source for bees. The forest edge trees provide cherries, cherry blossom nectar and pollen,maple keys and swollen tree buds in spring. Trees are also important insect-gleaning areas for birds. Forest leaf litter and woody debris are the energy source for a community of arthropods and oligochaetes at the base of the food chain. Wildlife species adapted to a suburban landscape setting, such as squirrels, short-tailed shrews, blue jays, song sparrows, and chickadees can take advantage of these food sources. Song sparrows were the most abundant bird in the western shrub thickets, and chickadees were observed at several woods edge locations. ' 3.2.2.2 Wetlands One large (roughly 16.5 acres), predominately forested, wetland unit is associated with the site. The Farm Brook, a perennial tributary of Plum Gulley Brook and the Podunk River flows through this wetland. Three cover types occur on-site: wooded swamp, wet meadow, and shallow marsh. A fourth cover type, shrub swamp occurs nearby in offsite wetlands, while open water habitat(i.e. pond) is also a part of the ecological unit. Off-site portions of wetlands and watercourses were also briefly investigated. Wetlands to the east(upstream) had been previously intensively investigated during the spring of 2002 for the first Berry Patch application (currently under construction). Remote sensing (i.e. aerial photograph interpretation) was also used to classify and characterize them. Characterization of contiguous off-site portions of these wetlands was needed to accurately assess their ability ' to perform a variety of functions. The delineation of these "wetland ecological units" is ' 03795SWN54\BerryFar2-EAIb-Final.DOC 17 Envirnomental Assessment Berry Patch II,South Windsor, CT November 26,2003 * ' consistent with guidelines set forth in the wetland evaluation models most commonly used in the region (see following section). ' This wetland unit is located on the north side of the property, closely bordering 240 feet of the eastern property boundary and approximately 1,200 feet of the northern property ' boundary. The wetland corridor ranges from 100 feet in width in the narrowest portion of the western wet meadow/emergent marsh to 750 feet at the center of the deciduous wooded swamp. Three tributaries flow into Farm Brook from the north and northeast, joining the brook in the large wooded swamp, and hillside seepage is also a significant source of water. The non-forested wetlands that border the western portion of the stream also form a broad habitat corridor; the maximum wetland width is 200 feet, but adjoining moist upland meadow adds to the effective size of the habitat unit. A much smaller, less valuable finger of wet meadow is located at the northern wooded edge of the large western field. The only activities proposed within wetlands are the sewer crossing over a 100 foot long wet meadow section at the western end of the site. This area will be restored to a naturally vegetated condition post-construction. Characteristics of the Farm Brook watershed, upstream of the site, influence the water quality and hydrology of the brook. Farm Brook originates approximately 1 mile to the north and northwest of the site. Landuses in the watershed are predominantly residential, with most units serviced by sanitary sewers. The old Foster Farm, with a moderate scale farming operation with approximately 30 head of cattle (2002 data) is on the eastern perimeter of the watershed, east of Foster Road. Potential water pollutants from these land uses include nutrients (lawn fertilizers and possibly cow manure), turf pesticides, and road sand. Active construction (sediment sources) is currently occurring in a only few areas of the upper Farm Brook watershed, and the large active construction site for Berry Patch 1, immediately upstream, has exceptionally well-designed and well-maintained erosion ' controls (see Photos 25 and 26, Appendix 1). The watershed includes extensive areas of fine-textured, erodible Wapping silt loams, as well as less erodible Manchester gravelly sandy loams. A portion of the Farm Brook watershed remains in a forested condition. ' The proportion of impervious surface is moderate in the upper watershed, consisting mostly of roads and roofs in housing subdivisions,but higher in the immediate site vicinity ' 03795SWN54\BeryFar2-EAlb-Final.DOC 18 Envirnomental Assessment Berry Patch II,South Windsor, CT ' November 26,2003 ' where multifamily housing is the predominant land use. Commercial land uses are minimal. Farm Brook is impounded at a minimum at one location upstream of Route 30, 1 as well as at the farm pond at the Berry Patch 1 site. The hydrogeologic settin>? of a wetland refers to the topographic, geologic and hydrologic conditions in which the wetland occurs (Golet et al. 1993). Golet et al. (1993) state that wetlands in Southern New England are found in two hydrogeologic settings: surface-water slope and groundwater slope. The primary water supply for this wetland system is groundwater from the underlying stratified drift aquifer and'groundwater seepage from upslope, for a hydrogeologic setting of "ground-water-slope." However, the hydrogeologic setting of the Farm Brook stream network and its active floodplain also includes a "surface water slope" component. These wetlands also receive water inputs during periods of elevated water levels associated with rain events flow. The non- persistent annual vegetation that is dominant in many parts of the wooded swamp is characteristic of frequently flooded floodplains. The Farm Brook wetlands have a "bottomland"landscape position. ' Soils in these wetlands are mostly mapped as very poorly drained Saco silt loams, with some poorly drained Limerick silt loams, as described above in Section 3.1. Man-altered Aquents appear to be limited to the soils near Farm Brook,just before it exits the site, and one apparently excavated area at the eastern end of the western field. A wetland's hydrologic rime refers to the "elevation and degree of fluctuation of the water table with respect to the land surface over time" (Golet and Lowry 1987). The ' wetland associated with this perennial stream supports several hydrologic regimes. The center of the Farm Brook stream channel is "permanently flooded"; the channel averaged 10 inches deep and four feet wide in the center of the wooded swamp inches on October 2°d, 2003. Stream flow is rapid and stream channel inundation is sufficiently long-lasting 1 that very little vascular, macrophytic vegetation grows within the channel. The margins of the channel and large areas of the adjacent swamps are "seasonally flooded " with very poorly drained soils. They are saturated or inundated for prolonged periods, except during the latter part of the growing season. Golet et al. (1993) define seasonally flooded as follows: "Surface water is present for extended periods, especially early in the growing season, but is absent by the end of the season in most years; when surface water is absent, the ' water table is often near the land surface." 03795SWN54\BenyFar2-EA1b-Final.DOC 19 Envirnomental Assessment ' Berry Patch H,South Windsor, CT November 26,2003 Soils on the banktop adjacent to the stream and in the higher elevation portions of the swamp may be "temporarily flooded" (during and immediately after larger storm events) ' and also experience "seasonal saturation", defined below by Golet el al (1993): "The soil is saturated to the surface, especially early in the growing season, but unsaturated ' conditions prevail by the end of the season in most years. Surface water is absent except for groundwater seepage and overland flow." Appendix 3 includes more detailed information on the classification and characterization of wetlands, in general, and specific tabulated information on each of the wetlands on the subject property. 3.2.2.2.1 Deciduous Wooded Swamp (WS) This cover type occupies nearly 70% of the wetlands on the site, all except for the far ' western area of wet meadow and shrub swamp area and a finger of wet meadow at the northern edge of the eastern field. It is classified as "broad-leaved deciduous palustrine forested wetland" (PFO 1), according to the NWI (National Wetlands Inventory) classification system. This wetland type is also known as a deciduous wooded swamp (WS-1), in the Golet classification system. The low diversity tree stratum is dominated by red maple throughout the entire wooded swamp, although one large pin oak was noted on the northern bank of the stream, with a diameter at breast height (DBH) of four feet. As discussed above, age class distribution is variable with somewhat larger, more strongly buttressed trees in interior, very poorly tdrained sections of the swamp with protracted flooding (see Photo 14, Appendix 1). The species composition of the shrub stratum and ground cover reflects the hydrologic regimes and soil drainage classes described above. I The shrub layer of this forested swamp is very diverse, with clumped (patchy) species distributions. Six shrub species are at least locally dominant in the swamp. Most characteristic of the somewhat drier, outer portions of the swamp with seasonal saturation or brief seasonally flooding is arrowwood (Viburnum dentatum). Occasional pink azalea (Rhododendron nudiflorum) and witherod (Viburnum cassinoides) were also noted in this hydrologic regime here. Highbush blueberry(Vaccinium corymbosusm), winterberry(Ilex verticillata), and spicebush (Lindera benzoin) occur in a variety of hydrologic regimes. Large clumps of speckled alder (Alnus serrulata) occupy frequently flooded areas at the 03795SW N54\BerryFar2-EA1 b-Final.DOC 20 Envirnomental Assessment Berry Patch H,South Windsor, CT . November 26,2003 north end. Multiflora rose is abundant in the swamp, especially on the sandy, slightly higher elevation soils of stream banks, where it competes with gray dogwood (Cornus racemosa) among other shrubs. Areas with very poorly drained soils and seepage drainageways with pockets and rivulets of standing water were numerous in the fall of 2003, and lack shrub cover. Herb and moss cover was only partially inventoried due to the fall season of field investigations. Cinnamon fern is common in seasonally saturated soils. In wetter sections the dominant species included skunk cabbage (Symplocarpus foetidus) (Photo 15, Appendix 1), cuckoo flower (Cardamine pratensis), and crested fern (Dryopteris cristata) (Photo 16). The remains of annual floodplain species were also noted, including jewelweed (Impatiens capensis). Tussock sedge is locally dominant in a few seasonally flooded areas. Few vascular plants grow within the stream channel, rooted in flowing water. Mosses and liverworts are well developed on the forest floor of this swamp, which exhibits the hummocky microtopography characteristic of less disturbed swamps with a fluctuating water table, as shown in Photos 16 and 19 (Appendix 1). ' Wildlife known to use the wooded swamp, based on observations of sign, include white tailed deer, raccoon, and wild turkey, and various other songbirds including catbird and tufted titmouse. With a 750-foot maximum width the swamp may supports several disturbance sensitive bird species, such as veery, although total acreage of the forest block is less than 25 acres. Food sources for wildlife include a wide variety of shrub berries, red maple keys and buds, and foliage insects that feed on red maples and the various shrub species in the swamp. Spicebush is a larval host plant for spicebush swallowtail. Three tributary streams flow into Farm Brook from the northeast, north, and northwest. Farm Brook itself receives water from the farm pond located approximately 1/4 mile to the east. This pond elevates water temperatures in the brook, even if it is not a significant source of pollutants or sediment. There is extensive bank erosion and sedimentation along the northeastern tributary, which receives runoff from Rte. 30, and along Farm Brook, downgradient of the confluence with this stream. Photos 11 and 12 (Appendix 1) show a ' sediment bar and bank erosion. Photo 10 shows a contrasting non-eroded stream stretch located upgradient of the confluence with the northeastern tributary. 03795SW N54\BeryFar2-EA1 b-Final.DOC 21 Envirnomenta[Assessment 1 Berry Patch H,South Windsor, CT November 26,2003 The specific conductivities4 of several sections of Farm Brook and in its three feeder streams were measured using a conductivity meter. This water quality parameter is a"first cut," non-specific indicator of potential water quality problems based on the concentration of dissolved ions, which increases the speed with which an electric current is passed though the liquid. It is directly related to the concentration of total dissolved solids, but does not indicate the type of ions in solution. In our region, conductivity in non-polluted soft water streams generally ranges from 70 to 120 mS/cm. Even in areas where bedrock geology contributes to higher readings, anything more than 300 mS/cm typically indicates that waters are too fertile or otherwise are contaminated. A variety of compound may increase specific conductivity, ranging from calcium carbonates dissolved from limestone, to nitrates from septic effluent, to road salts. Dissolved minerals from the silt loam topsoil at this site can be expected to raise conductivity levels in the stream stretches where bank erosion is severe. In this stream system, the highest conductivity (309.7 uS/sec) was measured in the northeastern tributary, which picks up considerable runoff from Rte. 30. The northwestern tributary had the lowest reading (201 uS/sec). The conductivity of Farm Brook was 1 highest immediately downgradient of the northeastern stream (287 uS/sec). The lowest reading was 246.6 uS/sec at the furthest downstream station, on the west side of Buckland ' Road, indicating that the extensive wetland on the site is renovating water quality for Farm Brook. The stream bank is no longer eroded along this stretch, as shown in Photo 24, ' indicating that erosive velocities have been dissipated. Unfortunately the sandy low gradient habitat at this site prevents the use of a bioassessment of benthic macroinvertebrates as a monitoring tool. 200 uS/sec is considered to be an approximate threshold, above which there may be cause for concern about water pollutants. Farm Brook and its tributaries provide some aquatic habitat, green frogs certainly use the streams, two-lined stream salamanders probably forage there as well, and the sandy substrate provides suitable habitat for larval development of some dragonfly and damselfly larvae, aquatic worms, as well as a variety of insects in the Dipteran (fly) order. However, the burial of hard substrate by sediment reduces the stream's capacity to support aquatic 1 insects such as mayflies and case-bearing caddisflies. Abundant raccoon tracks indicate that these mammals are able to find food in the stream. However, no fish or freshwater mussels were observed on the site, although some fish could find suitable habitat here. 03795SW N54\BenyFa2-EA1 b-Final.DOC 22 Envirnomental Assessment Berry Patch II,South Windsor,CT November 26,2003 3.2.2.2.2 Wet Meadow and Shallow Marsh Cover Types M/SM) These cover types dominate the western field in a broad corridor along Farm Brook. Shallow marsh, dominated by lake sedge (Carex lacustris) occupies the central swath immediately adjacent to farm Brook, and grades into the wet meadow in the gently sloping outer portion of the corridor. ' High species diversity characterizes this community; a variety of typical wet meadow species are present at relatively high densities in both the marsh and the meadow. 1 Common species include monkeyflower (Mimulus ringens) in wetter areas, New York Ironweed (Vernonia noveborecensis), New York aster (Aster novae belgii), small white aster (Aster vimineus), swamp milkweed (Asclepias incarnata), and boneset (Eupatoreum perfoliatum), and tearthumb (Polygonum sagittatum). They are associated with red top grass (Agrostis spp), various sedges, goldenrods,reed canary grass (Phalaris arundinacea) ' and a variety of other meadow species including blue vervain (Verbena hastata). A similar species assemblage is found in the eastern meadow finger shown in Photo 1 and Photo 5 (Appendix 1). On the gentle upper slope, near the barnyard, this cover type includes a higher proportion of annuals such as sticktights and smartweeds, which likely colonized trampled bare soil. It is very similar to the adjacent moist upland meadow, to be ' excavated for flood storage. The unusually high diversity of this wet meadow is probably the result of ongoing minor soil disturbance by the hooves of livestock, which provided seeding establishment sites for species that tend to be outcompeted over time in a meadow lacking soil disturbance. 3.2.2.2.3 Shrub Swamp (SS) On site this cover a is limited to a few forest edges that occur within wetlands e. . type g ( g Photo 18 along the western field; Appendix 1) and several shrub thickets in the western wetlands. The wetland unit does however include somewhat more extensive shrub swamp areas off-site to the east, which contribute to its wildlife habitat value. Multiflora rose is the dominant shrub, shown as a reddish, mounded areas area in the center background of Photo 6. Other wetland shrub species in the western wetland include alder, willows (Salix spp), and silky dogwood(Cornus amomum); these species are associated with cattail and a thick, very tall stand of the invasive wetland herb, purple loosestrife (Lythrum salicaria), next to farm Brook just before it exits the site. 03795SW N54\BerryFar2-EA1 b-Final.DOC 23 Envirnomental Assessment Berry Patch H,South Windsor, CT .� . November 26,2003 iWildlife usal?e for the wet meadow and emergent marsh cover types and for the shrub swamp cover type is similar to that described above for upland meadow and forest edge. 1 However, higher herbaceous species diversity increases value as insect habitat, in particular as a nectar source and larval host plant for lepidopterans. 4.0 WETLAND FUNCTIONS AND VALUES Research has shown that wetlands provide many important biological, hydrological and social functions (Mitsch and Gosselink 1986). It is desirable to quantify, to some extent, the relative value of a wetland or watercourse in regard to these functions. This is necessary in order to design environmentally sensitive site plans, predict with some confidence the potential impact of a proposed activity, and where unavoidable wetland impacts are to occur, be able to design suitable mitigation. Several scientifically based procedures have been developed in an attempt to assess the various functional values provided by wetlands. Five evaluation methods were drawn from to assess the watercourse and wetlands on the site. Of these, one method (Ammann et al. 1991) provided the general framework for the ' evaluation of functional values, while another (Golet 1976) was relied more heavily upon for the evaluation of wildlife habitat. The six procedures are the following: 1. Golet, F.C. 1976. Wildlife Wetland Evaluation Model. pp. 13-34 in: J.S. Larson (ed), Models for Assessment of Freshwater Wetlands.Univ.of Mass.Water Resources Research Center Publ.No.32. 2. Arnrnann, A.P., R.W. Franzen, and J.L. Johnson. 1991. Method for the Evaluation of Inland Wetlands in Connecticut:A Watershed Approach. CT DEP Bulletin No.9 ' 3. Hollands,G.G.and D.W.Magee. 1986.A method for Assessing the Functions of Wetlands.pp. 108- 118 in: J.A.Kusler and P.Riexinger(eds). National Wetland Assessment Symposium Proceedings. 1 4. WET 2: Wetland Evaluation Technique. Volume 11. 1987. U.S. Army Corps of Engineers Waterways Experiment Station Wetlands Research Program. 5. Hollands, G.G. and D.W. Magee. 1995. A Hydrogeomorphic Procedure for Assessing the 1 Functional Capacity of Wetlands: In press, U.S. Army Corps of Engineers, Waterways Experiment Station.Vicksburg,Mississippi. ' 6. U.S. Army Corps of Engineers (USACOE), New England Division. 1995. The Highway Methodology Workbook.,Wetland Functions and Values,a Descriptive Approach. The basic concept behind most wetland evaluation or assessment procedures is that wetland characteristics contribute to, or give rise to wetland functions that have certain value to natural systems or man. By assessing the relative importance of certain ' 03795SWN54\BerryFar2-EA1b-Final.DOC 24 AFTM Envirnomental Assessment Berry Patch H,South Windsor, CT November 26,2003 ' characteristics to a particular function (e.g. wetland class to the wildlife habitat function), and then weighing the various expressions of those characteristics in wetlands (e.g., ' shallow marsh, wooded swamp, etc.), one can arrive at the relative functional value for that function. ' The wetland functional assessment was based primarily on best professional judgment/experience and the use of some or all of the above referenced standardized Ievaluation procedures. The major functions and values of the Farm Brook wetland system in the vicinity of the site were formally assessed. The forested wetland ecological unit was evaluated separately from western system, including wet meadow, shallow marsh, and shrub swamp components. A functional rating for wildlife utilization for the entire 16.5- acre wetland system, using the Golet method, is included in Appendix 4. It should be noted,however,that the forest edge components of the evaluated wetland system that are adjacent to the proposed development have significantly lower functions and values than the larger wood swamp and wet meadow system. .Table 2 provides a summary of ratings of the functional values of the on-site wetlands. The rationales for the wildlife ' habitat and aquatic habitat functions have already been addressed in the wildlife usage section in the characterization of each wetland unit and adjacent upland cover types. A detailed rationale for the other functional quality ratings can be provided upon request. Overall, the on-site wetlands were evaluated as being of moderate quality for most functions, whereas the larger wetland system scored higher, mostly in the moderate and moderate-high ranking categories. The wooded swamp with irregular microtopography does function as a flood storage area and as a sediment trap. Streamside vegetation serves a bank stabilization function, but is ' relatively sparse along many stream sections. Emergent vegetation in the western meadow-marsh provides a pollutant and nutrient trapping function as well as its aquatic and wildlife habitat function. The fact that specific conductance was higher at upper end of the swamp than at the outlet is a clear indicator that pollutant attenuation of dissolved pollutants is taking place. The large number of wetland classes and the complexity of vegetation structure and the g P tY ' large size of the bottomland wetland system (16.5 acres) all increase wildlife habitat function. However, the suburban setting of the site, with nearby residential landuses and very limited complementary upland forested habitat limits ecological integrity and wildlife ' 03795SWN54M3erryFa2-EA1b-Final.DOC 25 Envirnomental Assessment Berry Patch II,South Windsor, CT �+ t November 26,2003 ' habitat value. Wider naturally vegetated upland buffers adjacent to wetlands with a higher diversity of shrubs would enhance wildlife habitat value and ecological integrity. ' Several functions, including aesthetics and es passive of recreation are increased b p � Y excellent access to the fields from the western end of the site. However, barbwire fences and multiflora rose thickets severely restrict access to the forested and wet meadow wetlands, limiting more active recreation within the wetlands and educational potential. Better water quality entering the site would increase aquatic habitat function as well as aesthetics. It is unclear whether the wetland system currently provides some finfish habitat, but it is clearly not a productive fish area. The site would offer opportunities for bird watching and nature study if travel ease and access were not so restricted. The proximity of residential areas precludes hunting. However, the wooded buffers on the site ' perimeter screen adjacent residential areas to a considerable extent, and the stream flowing though the meadow marsh is very attractive, as shown in Photo 6. Overall aesthetic value 1 of wetlands on the site is moderate to high. ' Table 2: Relative Wetland Functional Assessment Ratings Function Forested 'INleadow- Swamp Marsh Ecological Inte ri Moderate-high Low Wildlife Habitat Moderate-high Low-Moderate Finfish/Aquatic Habitat Low N/A Educational Potential Moderate Moderate Recreation — Water-based Low Low Non-water-based Low-Moderate Moderate Flood Control Moderate-high Low Groundwater Use Potential Low Low Nutrient Retention& Sediment 1 Trapping-Opportunity Moderate-high Moderate Efficiency Moderate-high Moderate-High Shoreline Anchoring&Dissipation of ' Erosion Forces Low-Moderate Moderate Noteworthiness None None Notes: The Assessment is primarily based on the CT DEP Bulletin No. 9 and the Golet Method, and derived using best professional judgment/experience. Possible functional quality ratings include: low, low- moderate, moderate, moderate-high,high,outstanding. ' 03795SWN54\BerryFar2-EA1b-Final.DOC 26 Envirnomental Assessment ' Berry Patch H,South Windsor,CT , November 26,2003 5.0 REVIEW OF LISTED SPECIES AND CRITICAL HABITATS ' In November of 2003, at the Natural Resources Center of the CT DEP, RES staff conducted a review of the "State and Federal Listed Species and Significant Natural Communities Map" for the overall property and its immediate environs. It was determined that the site does not overlap any areas of concern (i.e. critical habitats, endangered, threatened or special concern species) shown on the USGS Manchester Quadrangle, Map No. 38, printed from the CT DEP Natural Diversity Data Base in July of 2003. 6.0 WILDLIFE UTILIZATION AT THE SITE ' 6.1 INTRODUCTION In order to make environmentally responsible decisions concerning new development a ' methodology is essential that can accurately determine the relative value of land as wildlife habitat. Several such methodologies are available; some of which are qualitative ' while others semi-quantitative in nature, such as the Habitat Evaluation Procedures (HEP) developed by the U.S. Fish and Wildlife Service (Flood et al. 1977). Most of these methodologies, however, are labor intensive and focus on few specific "indicator" species ' rather than on overall wildlife population species richness and abundance. A simple, yet we believe effective, methodology is used here to assess the quality of the wildlife habitat and arrive at reasonable estimates of the populations supported on the property. This methodology is based on two overriding assumptions: (1) habitat quality is a direct function of habitat diversity for the majority of terrestrial vertebrate species, and (2) characteristics that contribute to the diversity of wildlife habitat such as interspersion of ' different vegetation or cover types, canopy cover of particular cover types, vegetative form, composition and structure, quantity and quality of edge between vegetation types, presence and distance from water, and special habitat features (e.g. rock outcrops, cavity trees, thick ' leaf litter, abundant perches, vernal pools, loose soil for burrowing, etc.) can be assessed through relatively short duration field visits and use of remote sensing (i.e. aerial photograph ' interpretation). ' 03795SWN54\BerryFa2-EA1b-Final.DOC 27 Envirnomental Assessment Berry Patch II,South Windsor, CT ' November 26,2003 * ' When a primary objective of a wildlife inventory is the assessment of potential impacts ' from proposed development, the size of the "study area" should be one of the first considerations. This is not an easy task because of the varied response of individual species to factors external or internal to the habitat it occupies. This response is a function ' of the type, frequency and duration of these factor(s), in combination with species' tolerance to human activity, home range, territory size, and changes in the a variety of biotic and abiotic factors. Because site-specific models that include all of these variables for all species are very difficult to construct, it is common practice to consider a "study ' area" that is somewhat larger than the immediate area of physical disturbance. Therefore, a "study area" equal to about 30 acres was chosen and included a few off-site areas, particularly areas to the north and east. Once the study area was defined, the dominant vegetative cover types and features (e.g. bedrock outcrops, etc.) were delineated. Seven (7) distinct upland and wetland cover types were delineated within the study area as classified and described in Section 3.2.2 of this report (see Table,I and Figure 2). Following the determination of cover types several field visits were conducted. The data from the field investigations were then merged with the preferred habitat type and territory size requirements of possible species, and known regional and local abundance using standard reference manuals (Bevier 1994, Klemens 1993, Ehrlich et al. 1988, DeGraff and ' Rudis 1983, Hamilton and Whitaker 1979). This resulted in a list of expected inhabitants and users of the study area that is based predominately on the synthesis of all available ' information and on best professional judgment. Species that were identified by calls, song, sightings, scat, tracks and other sign were also noted(see Appendix 2). 6.1.1 Results Ninety-one (91) wildlife species that are either known or expected to utilize the study area (i.e. confirmed and probable breeders; see attached Appendix 2), of which forty-six (46) were observed. Of these,nineteen(19) are considered wetland-dependent species, and are likely to occur on the site or immediately adjacent to it. Wetland-dependent species are defined as: ' 03795SWN54\BeryFar2-EA1b-Fina1.DOC 28 Envirnomental Assessment ' Berry Patch H,South Windsor, CT November 26,2003 1 "Species that may use non-wetland habitats, but occur in wetlands a preponderance of the year, or have critical life requirements met by wetlands that are not provided by non- wetlands"(Adamus et al. 1987) These species can be broadly categorized as wetland species i.e. obligate), for which g P ( ' wetlands are primary habitat, and as wetland-dependent upland species (i.e. facultative), which prefer wetlands at least equally to uplands or which live primarily in upland habitats but lay their eggs and develop through larval stages in the shallow waters of wetlands. These wetland and wetland-dependent species are the avians, herptiles and mammals associated with the site's wetlands that could be directly or indirectly impacted by the ' proposed development. ' 6.1.1.1 Avians An extensive list of avians likely to occur on the property as permanent or temporary residents was compiled. It is estimated that up to fifty-seven (57) avian species probably utilize the study area for breeding (i.e. confirmed and probable breeders), while many ' additional avians could use the site during migration, for feeding during the breeding season, or as overwintering habitat. Of the total expected avians, six (7) show a preference for wetland habitats and are probably associated with the development site's wetlands. These are the: mallard, eastern screech-owl, willow flycatcher, yellow warbler, common yellowthroat,red-winged blackbird, and common grackle. The avian species known or expected to breed within the property include species associated ' with upland deciduous woodland edges, wooded wetlands, shallow marshes, and upland shrub thicket and meadow situations. Many of these birds are ecological generalists with a known tolerance for habitat modifications, fragmentation and human disturbance, such as ' the flicker, mourning dove, blue jay, black-capped chickadee, robin, eastern phoebe, cardinal, song sparrow, northern oriole, downy woodpecker, and many others. Many of ' these birds could be described as"edge"habitat species. 6.1.1.2 Herptiles& Mammals It is estimated that the study area provides suitable habitat for up to thirty-four (34) individual herptile and mammal species (confirmed plus probable breeders) (see Appendix 2). Of these thirteen (13) are considered wetland-dependent species and are probably ' 03795SWN54\BerryFar2-EA1b-Final.DOC 29 Envirnomental Assessment ' Berry Patch H,South Windsor, CT November 26,2003 ' associated with the development site's wetlands. These are the: two-lined salamander, red-spotted newt eastern toad spring_peeper bullfrog green frog pickerel frog little ' brown myotis, eastern pipistrelle, big brown bat, jumping mouse raccoon and white- tailed deer. ' It should be noted that the majority of the breeding amphibians on the site would likely be associated with the off-site farm pond, the shallow marsh in the western portion of the site, ' and perennial stream(Farm Brook), and its three tributaries. ' 7.0 IMPACTS AND MITIGATION ' 7.1 INTRODUCTION ' According to standard wetland regulatory review procedures, mitigation should follow a prescribed format known as "sequencing." Simply stated, mitigation sequencing means that wetland impacts should first be avoided, then impacts that cannot be avoided should ' be minimized and, finally, impacts that cannot be further minimized, if substantial, should be mitigated through compensation (i.e., wetland restoration, enhancement or creation). ' Compensatory wetland mitigation, where it is required, should also follow a hierarchical order of restoration, enhancement, and finally, creation. ' As shown on the accompanying site plans, the proposed development has succeeded in avoiding permanent direct impacts and in minimizing indirect wetland impacts to the site's ' wetlands and watercourses, to the extent possible. This was accomplished through an iterative alternatives analysis process whereby the site design was successively modified ' during the design phase to reduce both direct and indirect impacts upon wetland areas. For instance, an earlier conceptual design proposed the filling of the small wet meadow finger associated with the site's eastern fields. However, the design team objective of avoiding direct impacts to wetlands coupled with the need to compensate for loss of flood storage within the 100-year flood plain, led to pulling the development envelope out of the wet meadow. ' Moreover, earlier concepts for stormwater management had the great majority of the drainage discharging to the northwest of the development area, by-passing the small wet ' 03795SWN54\BerryFar2-EA1b-Final.DOC 30 Envirnomental Assessment Berry Patch H,South Windsor, CT . ' November 26,2003 ' imeadow finger in the eastern fields. Just downgradient of this wet meadow is an area that is characterized by seasonal groundwater discharge. Taking water away from the surface- and groundwater-shed of this wetland would have undoubtedly resulted in a significant alteration of its hydrologic regime, towards the drier side of the spectrum. To alleviate this impact, the design was altered to bring treated water directly to the wet meadow. ' Finally, the design was augmented by excavating a depressional area at the terminus of the proposed water quality swale, to further polish runoff before it enters the wet meadow. The above are just mere examples of the design process as design team members J P � P � interacted with each other and with Town staff, who also offered constructive recommendations for enhancements to the drainage system or the overall design, that would further minimize indirect impacts upon the regulated resources. II � 7.2 INDIRECT WETLAND AND WATERCOURSE IMPACTS Long-term "indirect" impacts have been considered for the development proposal. These are typically associated with urban runoff, potential hydrologic impacts and visual and auditory disturbances to the wildlife utilizing a wetland or watercourse. Indirect impacts are often correlated with the size and quality of the buffer zones proposed, the intensity of the proposed activities adjacent to these resources and the functional quality and/or sensitivity of the resource to be potentially affected. Typically, flowing and standing waters are considered to be more sensitive to development within close proximity of their boundaries than are most vegetated wetlands. However, in this particular case, Farm Brook, the perennial watercourse on the site is not considered sensitive or highly functioning. As ' was discussed in an above section, the urbanized landuses upstream of the site have resulted in impairment of water quality. Therefore, even if sub-standard water quality renovation was offered at the site, which is not, it would be unlikely that surface water quality would be tfurther impaired to the point of affecting generally pollution tolerant aquatic species. Similarly, indirect impacts to wildlife are expected to be minimal as a result of the proposal. Due to surrounding landuses, the wildlife that utilize the site's resources, including wetland- dependent species, are not sensitive to human activities and would not likely be displaced. ' Moreover, the proposed plan would preserve and plant-out a large percentage of the ' 03795SWN54\BenyFa2-EA1b-Final.DOC 31 Envirnomental Assessment Berry Patch H,South Windsor, CT + . ' November 26,2003 i ' regulatory wetland/watercourse buffer, so that it would function to further protect the resources from adverse impacts. Another factor that influences the potential severity of impacts is the e of proposed use. P tY P h'P P P Elderly housing, such as the proposal, generates relatively low traffic and low activity next to wetlands when compared to a typical residential subdivision or most commercial/industrial proposals. 7.3 IMPACTS UPON WETLAND FUNCTIONS AND VALUES Under proposed conditions wetland functions and values are not anticipated to diminish ' significantly. No wildlife habitat within wetlands and little in wetland buffer areas will be permanently lost, since construction will take place largely in currently grassed or bare areas. The sewer crossing will be seeded and allow to naturally revegetate following installation of the pipe. The wooded swamp will continue to provide flood storage. It is likely that inputs of nutrients from manure will diminish with cessation of farming, which ' would improve water quality and aquatic habitat. However, the ecological integrity of the offsite wetland will diminish to a limited extent, following completion of the project. As described in the following section, the robust proposed landscaping and vegetation management plan will mitigate for these indirect impacts on ecological integrity, and will also enhance wetland functions and values in other ways. 7.4 CONCEPTUAL WETLAND BUFFER PLANTINGS PLAN Extensive buffer plantings are proposed to mitigate for activities in the regulated wetland ' setback and for indirect wetlands impacts from the project. A more detailed planting plan could be submitted under separate cover, incorporating input from the Commission. Sources of seed and planting stock may include Ernst Conservation Seeds in Meadsville, Pennsylvania, and New England Wetland Plants, of Amherst, Massachusetts. rBuffer plantings are proposed in the existing grassed areas that will remain between the building cluster and the adjacent wetlands; a total of approximately 1,100 feet of buffer ' will be enhanced. They are also proposed along the sewer line corridor, in both proposed flood storage creation areas at the western end of the site, and along Buckland Road on the upland roadside. Woody plantings will provide screening against noise and light, ' 03795SWN54\BerryFar2-EA1b-Final.DOC 32 Envirnomental Assessment Berry Patch II,South Windsor,CT ' November 26,2003 ' mitigating for impacts to the ecological integrity function. A variety of additional wildlife food sources and cover areas will also be provided to mitigate for potential loss of wildlife ' habitat function as a result of the project. The level of recreational use and aesthetic appreciation will significantly increase as multiple residents view the forested wetlands ' and the enhanced buffers from windows and while strolling on the grounds, and as drivers along Buckland Street enjoy the western plantings. ' Eastern Plantings ' The foundation of the planting design in the moderately well drained to somewhat poorly drained soils at the edge of the wetlands on the site will be single species shrub thickets of at least 8 to 12 shrubs each(minimum size: 2.5 feet in height), drawing from the palette of ' facultative wetland species already present within the wooded swamp, including winterberry and arrowwood as well as less common shrubs such as hawthorn. Single wetland trees (minimum 1-inch caliper), roughly 5-8, and specimen shrubs will be widely spaced and will include species missing or scarce in the wooded swamp, such as ip'n oak ' and witherod. The existing red maple forest will remain as a visual backdrop. A conservation-wet meadow wildflower seed mix will be planted between and in front of shrub clusters, supplemented by occasional beds of colorful perennial wildflowers of moist to wetland soils, using live propagules in two inch peat pots of the species already present in the wet meadow. These include red milkweed,New York Aster, and New York Ironweed. Water Quality Swales and Depressions The portion of the swales and excavated depressions that will be in contact with ' stormwater, will be planted with grass and sedge-dominated seed mix, appropriate for stormwater renovation, with species able to tolerate periodic flooding. Sewer Line ' Not only the wetland crossing, but also the entire sewer right-of way will be seeded with a conservation - wet meadow wildflower seed mix. This area will be maintained as open Ihabitat in perpetuity by periodic mowing, such as in the fall of each year. 03795SWN54\BenyFar2-EA1b-Final.DOC 33 Envirnomental Assessment Berry Patch H,South Windsor,CT November 26,2003 * Western Plantings_Areas ' The already attractive vista across the open western wetland from Buckland Road will be enhanced and maintained by plantings and vegetation management measures. Clusters of flowering shrubs and trees with narrow growth forms will be spaced far enough apart so as not to obstruct the existing views. The areas to be excavated for flood storage compensation, will in effect be wetland creation areas, as excavation will extend down to ' the seasonal high water table. These areas will be planted with the same herbaceous mix used in the eastern water quality swales, supplemented by four to five groupings of four to ' six shrubs around a single tree. Vegetation management will maintain and expand the open wetland cover type, by removal of multiflora rose and other shrubs on a biennial basis and by establishment of biological control agents to control purple loosestrife, which has infested the marsh-shrub swamp area at the northern extent of the wetland associated with Farm Brook. 7.5 STORMWATER MANAGEMENT: QUALITY ' 7.5.1 Design Objectives ' The proposed stormwater management system (SMS) is designed to meet two primary objectives: (1) to attenuate increases in flow velocities of stormwater discharges to wetlands, and (2) to protect the existing level of water quality from future degradation by providing at ' least a moderately-high degree of urban pollutant renovation. To achieve the aforementioned objectives several Best Management Practices (BMPs) have been ' incorporated into the SMS. In this section of the report the SMS is discussed with respect to its second objective: water quality renovation. ' BMPs, as they relate both to groundwater and surface water protection, are procedures or methods that can mitigate or eliminate the potential for water quality degradation. BMPs ' can be divided into Structural BMPs and Procedural BMPs. The former are typically engineered solutions,while the latter include procedures or housekeeping practices such as structure maintenance and roadway sweeping. ' 03795SWN54\BenyFar2-Fr41b-Final.DOC 34 Envirnomental Assessment Berry Patch H,South Windsor, CT . November 26,2003 The current philosophy in stormwater management stresses control of stormwater where it falls and combines both structural and vegetative measures to detain and "treat" the water. Specific needs regarding quality of stormwater runoff addressed for this project include: (1) maintenance of baseflows to the site's wetlands and watercourses, and (2) provisions for improving water quality to the highest degree possible with currently available,passive ' technology. ' 7.5.2 Structural BMPs The stormwater management system (SMS) is the central BMP proposed for the site to ensure protection of downstream water quality, particularly the Farm Pond and Farm Brook. As will be explained in the following sections of the report, the SMS is designed to filter, transform and store pollutants that could be carried in the stormwater runoff through biological, chemical and physical processes. Water quality structural BMPs assist in preventing the release of pollutants into urban ' runoff, or once they are released reduce the quantities that enter surface or groundwaters to levels or concentrations that are not harmful to wetland and aquatic ecosystems, and humans. Completely recapturing released pollutants is virtually impossible, and the expense of the BMPs exponentially increases for higher and higher levels of recapture. Prevention, which is also one of the goals of the proposed SMS, is always more efficient ' and cost-effective. The bulk of the stormwater runoff from the site's impervious surfaces will be treated within one distinct system, utilizing catch basins and enhanced vegetated swales. It should be noted, however, that in an effort to increase the efficiency of the proposed BMPs, water off the roofs of the proposed units would be infiltrated into the ground(see plans). ' 7.5.2.1 Catch Basins ' Numerous catch basins will be used for the site. These will be the standard type catch basins with minimum 24-inch deep sumps. They will serve to collect stormwater off the proposed internal roadways,parking areas, and a few other graded areas. ' The catch basins will be employed as thefrst step in the water quality renovation process ' to pre-treat runoff from paved areas. When properly sized and maintained, catch basin ' 03795SWN54\BerryFai2-EA1b-Final.DOC 35 Envirnomental Assessment ' Berry Patch H,South Windsor, CT November 26,2003 k. . ' traps are effective in reducing the sediment and pollutant load in runoff. Research has shown that practically all particles larger than 246 microns are removed by catch basins ' (i.e. >0.25 mm; medium sands and coarser) (Sartor and Boyd 1972). However, investigations have shown that trapped catch basin sediments have a much smaller median ' particle size than street dirt and, therefore, have a greater potential to pollute, if not properly maintained, than do particulates removed by street sweeping. Regular catch basin cleaning and maintenance, therefore, is of paramount importance for the proper functioning of this BMP, and to reduce the potential for sediment re-suspension and export to downstream receiving waters during rare, large volume scouring rains. 7.5.2.2 Vegetated Swales Two long vegetated swales, with a combined length of over 420 feet, are proposed at the site. These will act as the second step in the pollutant renovation "treatment train." These types of devices can be highly effective in polishing runoff. ' The following are some of the general criteria that are currently used for the design of water quality renovation swales. These might not apply to each site, but are implemented as conditions warrant. We provide discussion in italics relating to the specific site and application. ' a. During the "water quality storm" (i.e. < 1-inch storm) the grassed swale should be designed to provide a minimum of 12 minutes of residence time (from one end to the other). The slope of the swale influences this, which should not be more than 3%, and so does the length of the swale,which should not be shorter than 200 feet. Ideally,the swale should be designed to retain 1 the entire volume of the water quality storm, or at least the runoff from a 0.5-inch storm. The swale should also be designed to provide infiltration (see item "e" below), at least in the upper reaches (if possible). (The proposed swales are at least 200 feet long and very flat. It is expected that these swales will provide infiltration of runoff over a significant portion of their length,particularly for smaller storms). b. Swale width (at the bottom) should not be less than 8 feet(flat). (Both swales have 8-foot wide bottoms) c. Average flow velocity should not be more than 1.5 ft/sec. (According to the engineers flows for the 10 year design storm will not exceed this specification) ' 03795SWN54\BerryFar2-EA1b-Final.DOC 36 Envirnomental Assessment ' Berry Patch II,South Windsor, CT November 26,2003 ' d. Side slopes should not be steeper than 3:1 (4:1 is preferable). (3:1 to 4:1 slopes are designed for the swale) e. Where possible, for maximum water quality renovation effectiveness, the water quality grassed swale should be designed as a"dry swale" to promote infiltration. The bed of the swale should ' consist of a minimum of 24 inches (preferably 30 inches) of prepared soil (sandy loam)that has an underdrain pipe (slotted and wrapped in filter fabric) at the bottom. The swale would be ' designed to rapidly dewater during water quality storms. (Sufficient infiltration has been provided for this particular application. No further adjustments are necessary.) ' f Check dams should be provided and regular intervals (e.g. every 40'). Check dams could consist of 4" to 8" traprock, imbedded into the swale bed and not higher than 18". Another ' design would include 0.5" crushed traprock stone wrapped in filter fabric and overtopped with the traprock. The second one is more efficient in renovation, but could clog more readily over time if fine sediment is not taken out upgradient. (Check dams are proposed for this particular application) g. A riprap plunge pool could be provided prior to the grass swale to dissipate flow velocities and trap sediment if upgradient controls are limited. (Have been provided) h. The swale,including the outlet pipe if the"dry"design is used, should be designed to handle the - - 2 r yea storm before overtopping its banks. Handling the 10 year storm is preferable. An emergency spillway(riprap)could be provided to route water around the swale if necessary(e.g. ' where excess water would be a safety concern). (The swale will handle at least the 10 year storm as designed. No further adjustments are necessary) 7.5.Z3 Biofiltration Basins ' Two shallow biofiltration basins are being proposed at the terminus of each of the two water quality swales5. These are depressed approximately half a foot into the ground and ' be seeded to a dense sedge/grass wet meadow. These "bioretention" areas will not only further polish the renovated runoff the reaches them via the water quality swales, but also would provide some wetland-type habitat. ' S As fo the writing of this report only one of the two recommended biofiltration basins had been ' inporporated into the revised plans. However, a second such BMP at the western discharge point would be easy to accommodate here and be modeled after the basin at the eastern discharge point. ' 03795SWN54\BerryFar2-EA1b-Final.DOC 37 Envirnomental Assessment Berry Patch H,South Windsor, CT ' November 26,2003 8.0 REFERENCES Adamus P.R. E.J. Clairain Jr. R.D. Smith, and R.E. Young. 1987. Wetland Evaluation Technique (WET), Vol. 2. Methodology. U.S. Army Eng. Waterways Exp. Stn. Draft ' Tech. Rep. Y-87. 206 pp. Aronson, G.L., Watson, D.C., and Pisano, W.C. 1983. Evaluation of Catchbasin Performance for Urban Stormwater Pollution Control: U.S. Environmental Protection Agency, Municipal Environmental Research Laboratory, EPA-60O/52-83-043. ' Bender, G.M. and M.L. Terstriep. 1984. Effectiveness of Street Sweeping in Urban Runoff Pollution Control: The Science of the Total Environment, 33:185-192. I ' Bevier, Louis R. (Editor). 1994. The Atlas of Breeding Birds of Connecticut. Bulletin 113; Connecticut Departmental of Environmental Protection; Hartford, CT. ' DeGraaf, R.M. and D.D. Rudis. 1992. New England Wildlife: Habitat, Natural History, and Distribution. USDA Forest Service General Technical Report NE-108. ' Ehrlich, P. R., D. S. Dobkin, and D. Wheye. 1988. The Birder's Handbook: A Field Guide to the Natural History of North American Birds. Simon& Schuster. New York. 785 pp. ' Flood, B.S., M.E. Sangster, R.D. Sparrowe, and T.S. Baskett. 1977. A handbook for habitat evaluation procedures. USDI. Fish and Wildl. Serv. Resour. Publ. 132, Washington, ' D.C. 77 pp. Godin, A.J. 1977. Wild Mammals of New England. The Globe Pequot Press. Golet, F.C. 1973. Freshwater wetlands as wildlife habitat. Pages 84-103 in M. W. LeFore, W.C. Kennard, and T.B. Helfgott, editors. Proceedings of the Third Wetlands ' Conference. University of Connecticut Inst. Water Recourses.Rep. 26. Golet, F.C. 1976. Wildlife Wetland Evaluation Model. In: Models for Assessment of Freshwater Wetlands, J.S. Larson, Editor. University of Massachusetts Water Resources Research Center,Publication 32, 91 pp. Golet, F.C. and J.S. Larson. 1974. Classification of Freshwater Wetlands in the Glaciated Northeast. Bur. Sport Fish. and Wild. Res. Publ. 116. Washington D.C. 56 pp. Golet, F.C., and D.J. Lowry. 1987. Water regimes and tree growth in Rhode Island Atlantic white cedar swamps. Pages 91-110 In: A.D. Laderman, editor. Atlantic white cedar wetlands. Westview Press,Boulder Co. ' 03795SWN54\BerryFar2-Fa41b-Final.DOC 38 Envirnomental Assessment Berry Patch H,South Windsor, CT � ' November 26,2003 ' Golet, F.C., Calhoun, A.J.K., DeRagon, W.R., Lowry, D.J. and A.J. Gold. 1993. Ecology of Red Maple Swamps in the Glaciated Northeast: A Community Profile. U.S. Department ' of the Interior Fish& Wildlife Service. Biological Report No. 12. Hamilton, W.J., Jr., and J.O. Whitaker, Jr. 1979. Mammals of the Eastern United States, ' Second Edition. Comstock Publishing Associates a division of Cornell University Press, Ithaca and London. ' Klemens, M.W. 1993. Amphibians and Reptiles of Connecticut and Adjacent Regions. CT DEP Bulletin No. 112. ' Metzler, K.J., and R.W. Tiner. 1992. Wetlands of Connecticut. State Geological and Natural History Survey of Connecticut. 113 pp. Mitsch,W.J. and J.G. Gosselink. 1986. Wetlands. Van Nostrand and Reinhold,New York. Murphy, J.M. 1987. Water Quality Classifications Map of Connecticut. Water Compliance ' Unit,Department of Environmental Protection. State of Connecticut. Rodgers, J. 1985. Bedrock Geological Map of Connecticut. Connecticut Geological and ' Natural History Survey. Natural Resources Center, Department of Environmental Protection,in cooperation with the U.S. Geological Survey,Department of the Interior. ' Sartor, J.D. and G.B. Boyd. 1972. Water Pollution Aspects of Street Surface Contaminants. National Technical Information Service. Springfield, VA. Schueler, T.R., P.A. Kumble, and M.A. Heraty. 1992. A Current Assessment of Urban Best Management Practices: Techniques for Reducing Non-Point Source Pollution in the Coastal Zone. U.S. EPA, Office of Wetlands, Oceans, and Watersheds. ' Stone, J. R., J.P. Schafer, E.H. London and W.B. Thompson. 1992. Surficial Materials Map p of Connecticut. U.S. Geological Survey 1 03795SW N541BerryFa2-EA1 b-Final.DOC 39 p: pip Z" \�Yr L _ k � � +.6 r i;j�/ •7 i Y V4: ° _ ,.r ( ty ti,���l°` ,����� �'TE„ � •�qOi ,[! r t Y r r Y7 � �' � ° •. .f \r .r�r �Ih'-`a� N F fi �r �1� +/ re l�" '' � � ?' q(1V.� Zj�•,t a�� i! is l �x�v�3,:F., .�N*+_,.,r�i�.. ( �:4�°�,{ o. ' i 't - 1 . 's t" �.t ��`.' �. J+ '� ` f ++ .. 1 �1 � .. *a. s�. _ C t_ psi t � � --- -... •� i� 4, `fir s� , ` � is �.Y �� � / � . t ^t��j� _ �1i +, s� ,� �y mow` �. ��-� �_ I a •_:iF � ki• •6> � .�. � J �' 4 J .s ..y� � t. -`. �`� i i 4���� ��.. � �.; .. . 4F. `may a+• iy�%: � _ x ,y ' � _ r` ��' r � ��'� �~ � .'t �ji' "' is � � ►� � .. ., _ Rl ., Ye � °y'tlb"' s,y, s '� 1! r 1i� ��� ��� ,�• ; � ;,' �'`,j � e.;we�'�'y+t•�fiyt� ���.���,� ),,era r ���.. 41, low r si l A•n r i ,of �{ t 1, - •,� ,. � t AW �,g jam`- � � ♦w � �, � ��� t e� ! RYYrt t. 1 ' p `6% -�y `5xS551 wx7�"� E • � �� �r 1, yg, ft._ � � � -1rr'. �( � `` ✓ - 1 F-W.Trul- WE JAI �r s :4',, , - ��,. "A..i;� � � .� fib,• �_. _1. � 3 10. f R. -.• may.. �_ ��'`A ;{'a`�� 416 Al VA R 1 t d rS+� -fit .�° �r�^ t"i ,,, }ass• ,.�1�'S ' % � �� 1> �'f� (, r ' t I{ __ _ _ d' ♦- F' .. M .. -40 1 i. r L Photo 17:Typical view of forested swamp floor;note skunk cabbage and red maple leaves 1 i 1 1 1 Photo 16:Crested fern(Dryopteris cristata)(immature),a common groundcover of the ' site's swamp on a bed of liverwort ilk { At e. i .,Y t�j Mr 61 71, ti v x y��vaFs .,� �• �4�i, 1, I41, i j �• �, > ,may Q�' .. '_,� M . 1 r,� �.'` J'�(',fir l,' •�` 4 1 ilV '44{ ,t ♦ iJt `<' t ,�J �r'a aVj A,j��; g„�,�Pl�►��.c r � �s E��de�' to Fri ®/ A�A>._.�/!e 1 ..�� 9 I: e �i` s'.'r. `A•:'��\ III �� �� f4' PB' G K r - t Photo 25:View of effective erosion and sedimentation controls employed at Berry Patch I ' seen after a storm;note clarity of pond in backgournd;facing easterly t Photo 26:Close of triple erosion and sedimentation controls employed at Berry Patch I; ' note clarity of pond;facing easterly REM A ECOLOGICAL SERVICES, LLC 164 East Center Street, Suite 8 Manchester, CT 06040 SITE: Proposed Berry Patch II, South Windsor, CT ' PROPOSAL: Senior Housing DATE OF SURVEY: October and November 2003* ' STUDY AREA ACREAGE: +/- 30 WILDLIFE INVENTORY Species Observed Directly or Indirectly in the Study Area Balance of Species are those that are Expected to Use the Study Area(Breeders and Users) Common Name Scientific Name J Canada goose Branta canadensis Mallard Anas platyrhynchos Turkey vulture Cathartes aura Red-tailed hawk Buteo jamaicensis Wild turkey Meleagris gallopavo Killdeer Charadrius vociferus Rock dove Columba livia Mourning dove Zenaida macroura Black-billed cuckoo Coccyzus erythropthalmus Eastern screech-owl Otus asio Chimney swift Chaetura pelagica Ruby-throated hummingbird Archilochus colubris Red-bellied woodpercker Melanerpes carolinus Downy woodpercker Picoides pubescens Northern flicker Colaptes auratus Willow flycatcher Empidonax traillii Eastern phoebe Sayornis phoebe Eastern kingbird Tyrannus tyrannus Tree swallow Tachycineta bicolor Northr. Rough-winged swallow Stelgidopteryx serripennis Barn swallow Hirundo rustica Blue jay Cyanocitta cristata American crow Corvus brachyrhynchos Black-capped chickadee Parus atricapillus Tufted titmouse Parus bicolor White-breasted nuthatch Sitta carolinensis Rema Ecological Services,LLC (11126103) Wildlife Inventory: (Continued) Page 2 of 3 Common Name Scientific Name K Mt �x Carolina wren Thryothorus ludovicianus House wren Troglodytes aedon Veery Catharus fuscescens Wood thrush Hylocichla mustelina American robin Turdus mgratorius Gray catbird Dumetella carolinensis Northern mockingbird Mimus polyglottos Cedar waxwing Bombycilla cedrorum European starling Sturnus vulgaris Warbling vireo Vireo gilvus Blue-winged warbler Vermivora pinus Yellow warbler Dendroica petechia Praire warbler Dendroica discolor Black-and-white warbler Mniotilta varia American redstrart Setophaga ruticilla Common yellowthroat Geothlypis trichas Northern cardinal Cardinalis cardinalls Rose-breasted grosbeak Pheucticus ludovicianus Indigo bunting Passerina cyanea Rufous-sided towhee Pipilo erthrophthalmus Chipping sparrow. Spizella passerina Song sparrow Melospiza melodia White-throated sparrow Zonotrichia albcolis Dark-eyed junco Junco hyemalis Red-winged blackbird Agelaius phoeniceus Common grackle Quiscalus quiscula Brown-headed Cowbird Molothrus ester Northern oriole kterus galbula House finch Carpodacus mexicanus American goldfinch Carduelis tristis House sparrow Passer domesticus Norti two-lined salamander Eurycea bislineata Redback salamander Plethodon cinereus Red-spotted newt Notophthalmus v. viridescens Eastern American toad Bufo a. americanus Northern spring peeper Pseudacris c. crucifer Bullfrog Rana catesbeiana ' Green frog Rana clamitans melanota Pickerel frog Rana palustris Wood frog Rana sylvatica Rema Ecological Services,LLC (11126103) Wildlife Inventory: (Continued) Page 3 of 3 Common Name Scientific Name Common snapping turtle Chelydra s. serpentina Northern ringneck snake Diadophis punctatus edwardsii Eastern milk snake Lampropeltis t. triangulum Northern brown snake Storeria d. dekayi Eastern garter snake Thanmophis s. sirtalis Virginia opposum Didelphis virginiana Masked shrew Sorex cinereus Eastern mole Scalopus aquaticus Star-nosed mole Condylura cristata Little brown myotis Myotis lucifugus Eastern pipistrelle Pipistrellus subflavus ' Big brown bat Eptesicus fuscus Eastern cottontail Sylvilagus floridanus Eastern chipmunk Tamias striatus Woodchuck Marmota monax Grey squirrel Sciurus carolinensis Southern flying squirrel Glaucomys volans Deer mouse Peromyscus maniculatus White-footed mouse Peromyscus leucopus tMeadow vole Microtus pennsylvanicus Meadow jumping mouse Zapus hudsonicus Red fox Vulpes vulpes Raccoon Procyon lotor Striped skunk Mephitis mephitis White-tailed deer 4docoileus virginianus *Note:Some of the observed species are from inventories conducted in Spring of 2002 for Berry Patch I Rema Ecological Services,LLC (11126103) WETLANDS: The Physical Environment SOIL DRAINAGE CLASSES Excessively drained: Brightlycolored• usually coarse-textured; rapid ermeabili • very low water- . Y p permeability; rY holding capacity; subsoil free of mottles Somewhat excessively drained: Brightly colored; rather sandy; rapid permeability; low water-holding capacity; subsoil free of mottles Well drained: Color usually bright yellow, red, or brown; drain excess water readily, but contain sufficient fine material to provide adequate moisture for plant growth; subsoil is free of mottles to a depth of at least 36 inches. Moderately well drained: Generally any texture, but internal drainage is restricted to some degree; mottles common in the lower part of the subsoil, generally at a depth of 18 to 36 inches; may Iremain wet and cold later in spring; generally suited for agricultural use. Somewhat poorly drained: Remain wet for long periods of time due to slow removal of water; generally have a slowly permeable layer within the profile or a high water table;mottles common in the subsoil at a depth of 8 to 18 inches. Poorly drained: Dark, thick surface horizons commonly; gray colors usually dominate subsoil; water table at or near the surface during a considerable part of the year; mottles frequently found within 8 inches of the soil surface. Very poorly drained: Generally thick black surface horizons and gray subsoil; saturated by high water table most of the year; usually occur in level or depressed sites and are frequently ponded with water. Reference: ' Wright, W. R., and E. H. Sautter. 1979. Soils of Rhode Island landscapes. R.I. Agric Exp. Station Bull.429.42 pp. WETLANDS: The Physical Environment WETLAND HYDROGEOMORPHIC CLASSIFICATION Surface-Water Depression 6etlands: In these wetlands, precipitation and overland flow (surface runoff) collect in a depression where there is little or no groundwater discharge. Water leaves the wetland principally by evaporotranspiration and infiltration (groundwater recharge). The wetland hydrologic system lies above the local or regional groundwater system and is isolated from it by an unsaturated zone; thus,it is said to be"perched." In the glaciated Northeast, surface-water depression wetlands are most likely to form over bedrock or till deposits in topographically elevated areas of landscape; however, they may develop in lowland kettles or ice-block basins that formed in glaciolacustrine or fine-textured glaciofluvial deposits. Surface-Water Slope Wetlands: These wetlands are located along the edge of stream or lake or on the sloping surface of a floodplain. They may occur on till or stratified drift but are commonly found on alluvium. While precipitation and overland flow also feed these wetlands, the principal source of water is the overflow of the adjacent water body. The sloping surface of the wetland permits water to drain readily back to the lake or river as its stage falls. As was the case with the previous class, the wetland surface usually lies well above the local water table, so groundwater discharge to the wetland is negligible or nonexistent. Groundwater recharge from the wetland is possible, depending on the permeability of underlying surficial deposits. Groundwater Depression Wetlands: These wetlands occur where a basin intercepts the local groundwater table, so that groundwater discharge as well as precipitation and overland flow feed the wetland. Classic groundwater depression wetlands have no surface drainage leaving the site; however, occasional streamflow out may occur form basin overflow. Groundwater inflow may be continuous or seasonal, depending upon the depth of the basin and the degree of fluctuation of the local water table. During periods when the wetland water level is higher than the local groundwater table (e.g., after major precipitation events in dry season), groundwater recharge may occur. Groundwater may enter the wetland basin from all directions, or it may discharge in one area and recharge in another. In the glaciated Northeast, groundwater depression wetlands are most likely to occur in stratified drift, particularly in coarse-textured glaciofluvial deposits where relatively rapid movement between groundwater and surface water can occur. I Groundwater Slope Wetlands: These wetlands occur where groundwater discharges as springs or seeps at the land surface and drains away as streamflow. Most commonly, these wetlands occur on hillsides over till deposits or at the base of hills where stratified drift and till come into contact. Headwater wetlands are typically groundwater slope wetlands. The local water table slopes toward the wetland surface. Where groundwater flow is continuous, the soil remains saturated. At many sites, however, groundwater inputs cease during late summer or early fall as evaporotranspiration depletes soil moisture in the root zone, in which case the soil is only seasonally saturated. Permanent ponding of water is prevented by the sloping land surface, but water may collect temporarily in isolated depressions. Precipitation and overland flow provide additional water to the wetland on an intermittent basis. Groundwater recharge may occur in the wetland after such events,but amounts are likely to be negligible, especially where wetland soils have formed over dense lodgment till deposits. Where such deposits are present, groundwater slope wetlands may be fed primarily by shallow groundwater systems perched above the regional system. Reference: Golet, C.G., A.J.K. Calhoun, W.R. DeRagon, D.J. Lowry, and A.J. Gold. 1993. Ecology of Red Maple Swamps in the Glaciated Northeast: A Community Profile.USFWS.Biological Report No. 12 WETLANDS: The Plant Community WETLAND CLASSES AND SUBCLASSES IN THE GLACIATED NORTHEAST WETLAND CLASS WETLAND SUBCLASS Open Water (OW-1) Vegetated (OW-2)Floating-leaved (OW-3)Non-vegetated Deep Marsh (DM-1)Dead Woody (DM-2) Shrub (DM-3) Sub-shrub (DM-4)Robust (DM-5)Narrow-leaved (DM-6)Broad-leaved Shallow Marsh (SM-1)Robust (SM-2)Narrow-leaved (SM-3)Broad-leaved Meadow (M-1)Ungrazed (M-2) Grazed Shrub Swamp (SS-1) Sapling (SS-2)Bushy ' (SS-3) Compact (SS-4)Aquatic Wooded Swanip (WS-1)Deciduous (WS-2)Evergreen Bog (BG-1A) Compact Shrub (BG-1B)Bushy Shrub (BG-2)Wooded (BG-3) Emergent Note: Subclass(OW-2)has replaced(SM-4) Seasonally Flooded Class(SF-1 &SF-2)has been removed Reference: Golet,F.C.,and J.S. Larson. 1974. Classification of freshwater wetlands in the glaciated Northeast. USFWS Resour.Publ. 116. 56 pp. WETLANDS: The Physical Environment COALITION PVA TER REGIMES OF NORTHEASTERN IYETLANDS Seasonallr.flooded: Surface water is present for extended periods, especially early in the growing season, but is absent by the end of the season in most years. When surface water is absent, the water table is often near the land surface. Te,nporari r flooded: Surface water is present for brief periods during the growing season, but the water table usually lies well below the soil surface for most of the season. Seasonallr saturated: The soil is saturated to the surface, especially early in the growing season, but unsaturated conditions prevail by the end of the season in most years. Surface water is absent except for groundwater seepage and overland flow. Send perm maentlr flooded: Surface water persists throughout the growing season in most years. When surface water is absent,the water table is usually at or very near the land surface. Permanently flooded: Water covers the land surface throughout the year in all years. Vegetation is composed of obligate hydrophytes. Saturated: The substratum is saturated to the surface for extended periods during the growing season, but surface water is seldom present. This water regime applies to permanently saturated, non- flooded wetlands such as bogs. References: Golet, F. C., A. J. K. Calhoun, W. R. DeRagon, D. J. Lowry and A. J. Gold. 1993. Ecology of Red Maple Swamps in the Glaciated Northeast: A Community Profile. U. S. Dep. Int. Fish Wild. Serv.Biol.Rep. 12, 152 pp. Cowardin, L. M., V. Carter, F. C. Golet, and E. T. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. U. S. Fish Wild. Serv. Biol. Serv.. Program FWS-OBS 79/31. 103 pp. 1 WILDLIFE WETLAND EVALUATION MODEL SCORE SHEET (Golet 1976) Proposed Berry patch II, Buckland Road, South Windsor, CT 1 Manchester, CT George Logan AIN6M)EF20038-80 IN 11/26/2003 The evaluation is for existing conditions. Portions of the wetland,which are periodically mowed, offer little function as wetland wildlife habitat 1.5 7.5 WSW SS ❑ SM ❑ DM ❑ OW ❑ BG ❑ M a F ❑ WS 0 SS ❑ SM ❑ DM ❑ OW ❑ BG ❑ M ❑ F ❑ 2.5 12.5 + 16.50 acres 1.5 7.5 WS-1 m SS-1 SM-1Li BG-IAEJ DM-1 Lj DM-5 WS-2 Lj SS-2 dSM-2 Lj BG-1B DM-2 Lj DM-6 1.5 6.0 M-1 11 SS-3 Lj SM-3 8 BG-2 Ej DM-3 Lj OW-1 M-2 SS-4 F-1 BG-3 DM-4 Ll OW-2 Bottomland: deltaic ❑ Upland: lakeside ❑ lakeside ❑ streamside ❑ 2.5 10.0 streamside isolated ❑ isolated F O u M R S W o p r i e I a r e b n c t s e n a i r M t 1.0 4.0 s n n e r e t g a s t h 30.00% 5.00% 65.00% *Sign�cance Coefficient 47.5 r �r �r r■� rr r rr r �r t� r r� r r� r rr rr �■r r WILDLIFE WETLAND EVALUATION MODEL SCORE SHEET (Golet 1976) (Continued) WETLAND UNIT NO.: 1 yes ►� no 2.0 6.0 peripheral 1.5 5.0 scattered TYPE: 2 peripheral scattered 1.0 2.0 TYPE: 1 pH >7.4 1.0 1.0 pH 5.5-7.4 X pH <5.5 Golet,F.C. 1976. Wildlife Wetland Evaluation Model. pp. 13-34,In: J.S.Larson(ed),Models for Assessment of Freshwater Wetlands,University of Massachusetts Water Resources Research Center Publ.No.32. WETLAND WILDLIFE EVALUATION METHOD (after Golet, 1976) ' This system is not designed to rate the suitability of a wetland as habitat for any particular wildlife species, but it is intended to measure the capacity of the wetland to support a diverse and abundant wildlife population. The model is based upon the principle that the diversity of ' wildlife in a given habitat is directly related to the diversity of vegetation present. Specifically, the variety of life forms (trees, shrubs, emergents, surface vegetation, submergents) is more ' important in this respect than is vegetative species diversity. The model defines nine habitat criteria and assigns each a "significance coefficient", which is a measure of the relative importance of each parameter in maximizing wildlife diversity and abundance. Each parameter has several possible ranks, which when multiplied by the significance coefficient, provides a subscore for the parameter. The total wetland score is obtained by summing the subscores. ' The model is not designed to be used with wetlands that are smaller than 0.5 acres due to inherently weak resolving power of models such as this one in evaluating the marginal capacity of very small wetlands in fulfilling wetland values. Additionally, the 0.5 acre cutoff appears to be a critical threshold with regard to abundance and composition of wildlife populations due to habitat size requirements for breeding and foraging. Therefore, in general, any wetland not evaluated by this model should be considered of low value for wildlife habitat. Below is a brief description of the parameters of the Golet model. ' Wetland Class Richness - Assesses the number of different wetland classes in the wetland. The model defines 8 different wetland classes (Open Water, Deep Marsh, Wooded Swamp, etc.) based upon the dominant vegetation types present in the wetland. Habitat value is directly related to the number of wetland classes present. Doininant Wetland Class - Based upon the principle that certain wetland classes (e.g. Deep Marsh)provide better wildlife habitat than others (e.g. Meadow). Size Category- In general, the quality of wildlife habitat is directly related to wetland size. Subclass Richness - Assesses the number of different subclasses present in the wetland. The model defines 26 different wetland subclasses (Sapling Shrub Swamp, Bushy Shrub Swamp, Compact Shrub Swamp, etc.) based upon dominant vegetative types present in the ' wetland. Habitat value is directly related to the number of wetland subclasses present. Site Type - Determined by the topographic and hydrologic location of the wetland (e.g. bottomland-streamside, upland-isolated). Certain topographic/hydrologic combinations (e.g.bottomland-streamside)provide better habitat than others (e.g. upland-isolated). Surrounding Habitat - Habitat value increases with the amount of adjacent edge in forestland, agricultural or open land, or salt marsh. Cover Type - Measures the proportion of open water and cover present in the wetland and the tdegree to which the two are interspersed. Habitat value is generally greatest when cover and open water are present in roughly equal amounts and interspersed in a clumped fashion. Vegetative Interspersion - Assesses the amount of edge occurring between different vegetative subforms. In general,habitat value increases with the amount of edge present. Wetland Juxtaposition - Assesses the degree to which the wetland is hydrologically ' interconnected to other wetlands in the area. Hydrologically interconnected wetlands are more valuable to wildlife than those which are hydrologically isolated. ' Water Chemistry - The model considers pH as an index of potential plant productivity. It assumes that water chemistry influences the presence, abundance and distribution of aquatic plants and invertebrates that serve as food for wetland wildlife. Golet notes that the assignment of a numerical score to a wetland is controversial, since this may be misinterpreted as suggesting that a wetland receiving a low score may be automatically selected as a candidate for development activities. However, the scores must be compared to those obtained for other wetlands in the area for comparative purposes. Furthermore, other ' wetland functions must be considered since their value may be completely independent of the wildlife habitat value. For general evaluation purposes, Golet has defined the following very broad classes for the interpretation of the scores obtained from the model: Score Rating ' 35.0 to 50.0 Low 50.5 to 60.0 Moderate ' 60.5 to 70.0 High 70.5 to 105.0 Outstanding Golet,F. C. 1976. Wildlife wetland evaluation model. Pages 13-34 in J. S.Larson,editor. Models for assessment of freshwater wetlands.Univ.Mass.Water Resour.Res.Cent.Publ. 32. MEMORANDUM To: South Windsor Inland Wetland/Conservation Commission. From: Jeffrey H. Folger—Environmental Planner/Conservation Officer Date: December 12, 2003 Re: App. #03-83P—Berry Patch II Senior Housing Project-Plans dated 12/11/03. The submitted revision appears to address all of the previous outstanding comments. The proposed vegetation management plan, if implemented, will adequately address the management of invasive plant species on the property on both the short term and the long term. The planting plan should be altered to maximize the amounts of riparian and habitat plants installed in the 40-foot buffer adjacent to the watercourse on the eastern portion of the site. I would recommend utilizing bare-root seedlings for this purpose. Large quantities of plants can be installed economically that will, within several years, form a dense, diverse riparian buffer with high wildlife value. The development on the eastern side of the site has been removed from within 40 feet of the watercourse. This separating distance will allow the establishment of a significant vegetated riparian buffer. A settling basin has been added to the eastern swale. This structure will act to further increase the residence time within the drainage system to acceptable levels. The western structure has been changed to be a detention basin based on the Town Engineer's comments. The 12"outfall orifice will limit volume and velocity exiting the structure, while providing an extended residence time for pollutant removal. The current plans have incorporated a walking path extending from the northern phase west to Buckland Road. This path is proposed to be placed in the wetland area that previously had only the buried sanitary sewer in it. This addition would constitute a permanent disturbance to the wetland. This disturbance could be considered minor if the path was to be made of a permeable material, such as stone dust. The current plans show an asphalt surface planned. An option that should be explored by the applicant is to utilize the existing farm road that goes from the Katten barns, behind the existing detention basin on the"Village At Buckland"property, to the existing farm field. This would make an excellent path for the path. The applicant would also like to access the site from Buckland Road for construction equipment. I believe a prudent alternative would be to access the site from the existing site to the south. MEMORANDUM To: Marcia Banach, Director of Planning Jeff Folger, Environmental Planner RECEIVED IWA/CC Members DEC 1 7 2003 From: Jeffrey B. Doolittle, P.E., Town Engineer C y-P SOUTH V1'!NDSOR PLANNING DEPT. Date: 12/17/03 RE: App 03-83P, Berry Patch If Site Development Plan I have received a revised drainage design and revised calculations for the Berry Patch II Site Development Plan. The drainage design for the Katten parcel now includes a detention basin as well as a water quality swale. The calculations show that this system will reduce the developed peak runoff to below existing pre-development rates for all storm events ranging from 2 year to 100 year from the Katten parcel. The Calvary parcel still includes a large detention/infiltration basin and the peak runoff from this parcel will also be reduced for all storm events, as a result of the proposed drainage design. The revised drainage calculations also address other questions I had concerning the details of these drainage calculations. In summary, the revised drainage calculations and design satisfy my previous concerns about the stormwater flows from this proposed development. Please call me(x 245)if you have any questions. .`OWN Sf4 co To� o-P Sau� ?d&id&),t 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CONN. 06074 SOR•co AREA CODE 860/644-2511 December 30, 2003 Certified #70020510000081151607 Design Professionals, Inc. Attn: Ms. Karen Isherwood 165 South Satellite Road South Windsor, CT 06074 RE: Appl. #03-83P— Berry Farm Senior Development, AA-30 Residential zone &GD Gateway Development zone Dear Ms. Isherwood: At the December 17, 2003 regular meeting, the Inland Wetlands Agency/Conservation Commission approved with conditions application #03-83P — Berry Farm Senior Development— 205 Oakland Road — Inland Wetland/Conservation Commission application for the construction of a 94 unit senior apartment complex on 33 acres, stormwater structures, parking lots, and associated improvement on property located . easterly of Buckland Road, northerly of Deming Street. AA-30 Residential zones & GD Gateway Development zone. This approval is subject to the following conditions: 1. One blueprint copy of the entire set of plans and this letter reproduced thereon, must be submitted to this Commission. This must be completed within 65 days of approval prior to any construction activity on the site. Plans submitted to Planning & Zoning Commission shall be considered having met this requirement. 2. The application shall indemnify and hold harmless the Town of South Windsor against any liability, which might result from the proposed operation or use. 3. The permit is valid for five years and shall expire on December 17, 2008. It is the landowner(s)/applicant(s) responsibility to track expiration dates and notify the Commission of a renewal request at least 65 days prior to expiration. 4. All approvals required must be obtained and submitted prior to any activity on the site. 5. A contact person shall be identified on the plans. Berry Farm Senior Development December 30, 2003 Page 2 6. We recommend a bond in the amount of $25,000 be submitted to the Planning & Zoning Commission to ensure compliance with the Erosion and Sedimentation Control Measures. 7. We recommend a bond in the amount of $20,000 be submitted to the Planning & Zoning Commission to ensure the installation and the establishment of the stormwater structures. 8. The operation and maintenance plan adopted for Berry Patch I should be extended to include the additional phases. 9. Town staff to review and approve the modified planting plan as submitted. The applicant should modify the plan to Town staffs satisfaction. 10. Town staff to review and approve the location and surface material being used for the pathway. Very truly yours, Eliza Warren, Chairperson INLAND WETLANDS AGENCY/ CONSERVATION COMMISSION EW:dr cc. The South Windsor Housing Authority The Metro Realty Group, LTD .SOW N Sf4 a S -aa� 0-p so� � 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CT 06074 f�OSoe-CO TELEPHONE (860) 644-2511 ?IJ�JGJ �� "-o _ �L� .COW N Sf4 Town O-Ps-0udt ?V� 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CT 06074 soe-co TELEPHONE (860) 644-2511 NOTICE OF VIOLATION FAX and CERTIFIED MAIL Mr. Goeffrey Sager Metro Realty July 22,2005 6 Executive Drive Farmington, CT 06032 Dear Mr. Sager: Re: Failure to maintain erosion controls at Berry Patch II site, South Windsor. By this letter you are whereby ordered to cease any activities that contribute to the degradation of wetlands or watercourses including the large scale grading of earth on the site and failure to follow approved and amended erosion and sedimentation plans. Further,you are required to remove accumulated sediment deposited in the wetland area and stabilize the deposition areas. You are so ordered based on the following facts: 1. The Inland Wetlands Agency/Conservation Commission has the authority and the responsibility to regulate inland wetlands and watercourses in the Town of South Windsor under sections 22a-36 through 22a-45 of the Connecticut General Statutes(CGS) and the South Windsor Inland Wetland, Watercourses, and Conservation Regulations. 2. On July 18,2005, 1 made an inspection of the construction site and discovered that no erosion controls had been erected to prevent sediment migrating into adjacent wetland areas as a result if installing a sanitary.sewer line and auxiliary access to the site from Buckland Road. This has resulted in of sediment being deposited in the adjacent wetlands to the north. This is in direct violation of the approved erosion and sedimentation plan. 3. These activities have occurred through negligence and a lack of regard for the preservation of water resources onsite and offsite. (Section 22a-44, CGS and Section XV of the Inland Wetlands, Watercourses, and Conservation Regulations) and constitute a violation of the law; contrary to public policy set forth in Section 22a-36 CGS. This notice of violation is issued in accordance with Section 22a-44, CGS and Section XV of the Inland Wetlands, Watercourses, and Conservation Regulations. I am requiring you to: • Cease-all land grading activities associated with the construction of the Berry Patch II. • Remove accumulated sediment from the impacted wetland area by the least intrusive method possible. Seed and mulch damaged areas.