Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
17-28P Schoolhouse Drive Stormwater
1 �ECEIVED SUN 3 0 2 1 AO 0» J 1 C Sas; �N�,ND 1;tF `.or D oERV�T;pN SAGENC �\ o�,�r,�SSrO C N 1 Stormwater Management Report 1 School House Drive 1 Site Plan 1 755 Ellington Road & 760 Pleasant Valley Road i South Windsor, CT 1 1 1 1 Prepared for: 1 RSK KELLCO INC. 1744 Ellington Road South Windsor CT Prepared by: 4 "''/�`�` 1 Design Professionals, Inc. 1 21 Jeffrey Drive South Windsor, CT 1 June 29, 2017 1 ��SIOI'la�i ,1 Table of Contents Section Page ' Introduction I Pre-Development Site Conditions 1 ' Post-Development Site Conditions 2 Storm Sewer Collection System 2 Analysis of Results 3 ' Water Quality 3 Conclusion 3 Appendices A Pre-Development Drainage HydroCAD Report B Post-Development Drainage HydroCAD Report C NRCS Soil Map &Data ' D Onsite Storm Sewers Analysis E Water Quality Calculations Water Quality Volume Calculation ' Water Quality Basin &Forebay Stage Storage Reports F Drainage Area Maps Existing Drainage Areas (Pre) ' Proposed Drainage Areas (Post) 1 1 ' Introduction ' On June 14, 2016 Applicant RSK Kellco Inc. obtained approval for a Design Residence Zone General Plan of Development to develop a proposed 5.50 Acre parcel to be created from 2 lots at 755 Ellington Road and 760 Pleasant Valley Road. On behalf of the applicant, Design Professionals Inc. submits the following drainage study as required to satisfy approval conditions. As approved, the development will consist of the creation of 14 single-family residential units with associated site improvements including a new private road, street trees, lighting,utilities, and stormwater management BMP's. Of the 5.50 Acre tract, approximately 5.22±Acres of the parcel is proposed to be disturbed. The ' proposed site is bounded to the west by Ellington Road, and residential lands to the north,east and west. For more information,please refer to the plans entitled"School House Drive - Site Plans -Design Residential Development-755 Ellington Road,760 Pleasant Valle Road South ' Windsor, CT -Map 24,Lots 164 & 184"prepared by Design Professionals, Inc. and dated June 29, 2017 as amended. ' Pre-Development Site Conditions The existing surficial characteristics of the site can be classified as residential &farmlands. To ' accurately assess the existing drainage conditions, small portions of the abutting properties to the north, south, and west, were included in the drainage analysis. Evaluation of the topography in the area demonstrated that runoff from these abutting properties discharge to the subject site. The additional upland areas added residential and woodlands to the watershed study area. An existing small stream and headwall were identified at the south-west corner of the site. The headwall conveys the stream across Ellington Road via a 48"RCP pipe were it then continues flowing north until it enters the Podunk River. Evaluation of the existing topography of the site demonstrated that all collected storm flows, currently traverse from east to west across the site to ' this headwall. As such, the headwall was selected as the design point for our drainage analysis. The extent of the woodland,residential, and farmland contribution, along with the sites watershed delineations were identified in the Existing Conditions Drainage Map located in ' Appendix F. Based on Natural Resources Conservation Service (NRCS)Hydrologic Soil Group (HSG) ' mapping, soils types A, B, &C are located on site. See Appendix C for The NRCS Soil Map & Data. An evaluation was performed to quantify the peak rate of stormwater discharge offsite to the design point previously discussed. The Natural Resources Conservation Service's TR-55 ' Manual was followed in predicting the peak rates of runoff and volumes. HydroCAD computer modeling software was utilized. The peak rates of stormwater runoff discharging to design point were determined for the 2-, 10-, 25-, and 100-year storm events. For more information,please refer to the enclosed Pre-Development Drainage HydroCAD Report located in Appendix A. ' 1 Post-Development Site Conditions The subject project proposes the construction of 14 single-family residential units with a new ' private road, street trees, lighting, utilities, and stormwater management BMP's. In the proposed condition, stormwater from the site will be collected, retained, and then discharged toward an existing headwall at the south-west corner of the property. , The proposed grading for the 14 single-family residential units will maintain the natural conveyance pattern of storm flows, while still promoting positive drainage away from the ' proposed units. A water quality basin is proposed as the main component of attenuation and treatment of peak storm events from the proposed roadway and majority of the proposed roof areas. All stormflows will be collected and conveyed through a series of underground culverts ' and catch basins to the proposed water quality basin. Overland flow of the remaining drainage area from the abutting woodland and residential areas to the east, will be conveyed directly to the headwall through a series of yard drains and culverts along the southern and eastern clearing ' limit. See Appendix B for the Post-development condition HydroCAD report. Stage storage reports for the water quality pond are included in Appendix E.The Proposed Conditions Drainage Map for the site is located in Appendix F. ' Storm Sewer Collection System The proposed subsurface stormwater collection and conveyance system was designed to ' adequately convey proposed runoff under 10-year storm event. The design of the storm sewers follows the guidelines set forth in the Connecticut Department of Transportation's Drainage Manual. It is calculated that during a 10-year storm event, all proposed subsurface culverts will have sufficient capacity to convey the generated storm runoff. Results from the onsite storm sewer analysis can be found in Appendix D. 2 ' Analysis of Results ' The pre-development and post-development conditions were analyzed using HydroCAD consistent with National Resource Conservation Service(NRCS)hydrology methods. Design Point#1 was identified as our point of interest for assessing downstream effects. ' The following table contains the data generated from the HydroCAD software: Runoff Rate ' Storm Pre- Post- Discharge Point Event Developed Developed Net 1 (Year) Condition Condition Change (ft3/second) (ft3/second) 2 4.22 1.70 -2.52 Design Point 1 10 12.23 6.91 -5.32 TOTAL AREA to Route 30 System 25 17.25 12.68 -4.57 ' 100 26.82 22.66 -4.16 As seen in the table above, the subject project will result in peak runoff rates in the proposed ' condition that are less than the peak runoff rates of the existing condition for all design storms. Water Ouality All new catch basins are proposed to have deep sumps in an effort to contain sediment and floatables. The proposed water quality basin was also sized in accordance with the 2004 ' Connecticut Stormwater Quality Manual. It provides a treatment volume greater than the water quality volume and a pre-treatment forebay volume greater than 10% of the water quality volume. Pond and forebay stage storage reports are included in Appendix E. Water Quality ' Volume Calculations are also included in Appendix E. Conclusion ' The proposed stormwater management system as discussed herein and shown on the referenced plans reduces peak rates discharging off site and provides water quality treatment that is ' consistent with Town and State requirements. ' 3 APPENDIX A Watershed Computations (Pre-Development Drainage HydroCAD Report) a Main Catchment (Total Drainage to Route 30 System ) ' SUbC1t Reach On Link Routing Diagram for 3574-Existing Condition Prepared by Hewlett-Packard Company, Printed 6/27/2017 FHydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC 3574 - Existing Condition ' Prepared by Hewlett-Packard Company Printed 6/27/2017 HydroCAD®10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 2 Area Listing (selected nodes) ' Area CN Description (acres) (subcatchment-numbers) , 1.500 39 >75%Grass cover, Good, HSG A (1 E) 2.420 61 >75%Grass cover, Good, HSG B (1 E) 0.300 74 >75%Grass cover, Good, HSG C (1 E) 0.740 98 IMPERVIOUS (1 E) 1.410 67 Row crops, straight row, Good, HSG A (1 E) 0.080 78 Row crops, straight row, Good, HSG B (1 E) ' 2.400 85 Row crops, straight row, Good, HSG C (1 E) 0.680 36 Woods, Fair, HSG A (1 E) 1.750 60 Woods, Fair, HSG B (1 E) ' 0.270 73 Woods, Fair, HSG C (1 E) 11.550 65 TOTAL AREA i 1 1 1 1 1 1 ' 3574 - Existing Condition Type 1/124-hr 2 Rainfall=3.20" Prepared by Hewlett-Packard Company Printed 6/27/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 3 ' Summary for Subcatchment 1 E: Main Catchment (Total Drainage to Route 30 System) Runoff = 4.22 cfs @ 12.36 hrs, Volume= 0.509 af, Depth> 0.53" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Rainfall=3.20" ' Area (ac) CN Description 0.740 98 IMPERVIOUS ' 0.680 36 Woods, Fair, HSG A 1.500 39 >75%Grass cover, Good, HSG A 1.410 67 Row crops, straight row, Good, HSG A 1.750 60 Woods, Fair, HSG B ' 2.420 61 >75%Grass cover, Good, HSG B 0.080 78 Row crops, straight row, Good, HSG B 0.300 74 >75%Grass cover, Good, HSG C ' 0.270 73 Woods, Fair, HSG C 2.400 85 Row crops, straight row, Good, HSG C 11.550 65 Weighted Average 10.810 93.59% Pervious Area ' 0.740 6.41% Impervious Area Tc Length Slope Velocity Capacity Description ' (min) (feet) (ft/ft) (ft/sec) (cfs) 8.4 100 0.0750 0.20 Sheet Flow, Grass: Dense n=0.240 P2= 3.20" 12.2 1,077 0.0440 1.47 Shallow Concentrated Flow, ' Short Grass Pasture Kv= 7.0 fps 20.6 1,177 Total 3574 - Existing Condition Type N 24-hr 2 Rainfall=3.20" ' Prepared by Hewlett-Packard Company Printed 6/27/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 4 Subcatchment 1 E: Main Catchment (Total Drainage to Route 30 System) ' Hydrograph 4.22 cfs 4 --------i----+ --- -----+----I- - 1-----F---- --- -I I ;Tape ift24-1hr- 2 Rai0fall-3.210.. ' , 3 -------- --------------,- _I__Ru noff Area 11.550-ac N Runoff iVoWmO=0.609;of ' _3 Runoff Deptha0.53" LL 2 - - Flow- --__1 J , ----- LengthT;1T- I Tc�-_2066 Min t 7 T -I- , I 1 1 I I I , 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ' 3574 - Existing Condition Type 11124-hr 10 Rainfall=4.70" Prepared by Hewlett-Packard Company Printed 6/27/2017 HydroCAD®10.00-16 s/n 09320 02015 HydroCAD Software Solutions LLC Page 5 ' Subcatchment 1 E: Main Catchment (Total Drainage to Route 30 System) Hydrograph 12.23 efS i Tyke III 24�hr 11 - ----,----r---- -------------r --r--- - ---r----r- -I---- ,----r---- 10 --------7----T-------------T---- --;---- ----TIO Rain'fa11:�4.70"-- 9 - ------- ---- ---------,---- ----I ----Rt�t�flff A�`ea�1-1MGae-- w ftrroff Vo14m4_1-.260 afi- 7 3 ---- I---- ----,-------- ;--- -- -,---- RunoffDej b:A_. 2"- 0 I 1 I I I ------------------------ 5 - I ----I------Flow-Lendth 1,1-17'-- --------------------------- 4 ---- ---' --- --------=----'-T6=2Q�fixx�i-a----- ---- -------- ---- j ' 3 - ---- ------ -------------------- �N=65-- ----------------- ---- -- 2 -------- ---- '----------'-----' ----=----'-- ------ '-----'-----'-----'---- '- 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 3574 - Existing Condition Type 11124-hr 25 Rainfall=5.50" , Prepared by Hewlett-Packard Company Printed 6/27/2017 HydroCAD®10.00-16 s/n 09320 02015 HydroCAD Software Solutions LLC Pape 6 Subcatchment 1 E: Main Catchment (Total Drainage to Route 30 System) , Hydrograph 19 ----'------------------------------------------I-------------- ' I I I I I I I I I I I I -------------------------- 18 ' ;---- ----;-----;----', -- 17.25cfs I 1 1 1 --- - - - 1 1 1 16 -------- ----;---- ------------- ------;----T---- Tpealt 2hr--I 15 -------------T----,--------;---- --I---- ---- 51aix�faJ15.5r0`'-- 1 14 ----1---- ---- ---------1----T----Y ------ ---- I 13 --- ---- ----+--- ----4---- --RCrnoff Areat:1Tl:550 ac- 12 -------- ----+-------------+---- - ------ ----+---------I---- ----+---- L __;�ur�off1Vo� t �-f. 4�9,of 10 -------------1-------------'---- -- ------'---- ----L----'---- ---- ---- _ -- -- - Runoff Dep#h�1,82--- LL ' 8 --- ---- --- --- ---- --- -- -----Ft6WLen ' -h I,1�T-- 7 ----,----j--------------1----7----I -- ------.----7----,---- I I I I I I I I I I I I 6 ---------,---- --- ----1--- --- ---- ----T--- TezZL6-rTilm- YFF�65-- I I I I I 1 I I I I I 1 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) I ' 3574 - Existing Condition Type W 24-hr 100 Rainfall=6.90" Prepared by Hewlett-Packard Company Printed 6/27/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Pa,o 77 ' Subcatchment 1 E: Main Catchment (Total Drainage to Route 30 System) Hydrograph 30 --- i i i I � i 26.82 cis ---- i I I I I I I I I I I I I I I I I I 24 ---- ---------t----I --------1----L ---'----J----1----'---------J----L---- ---------7--- - ---- ---- Type III 24 hr -- ' I -- 100-Rafx fallT6,90'--'-- I I I I I I I I I I I I I I 20 ----;----;---- ------------- ----;- --;--Runoff Aryea"1-1.55Gac- --- 1 16 -�---- ----�----II----,----+----;- --;Rur�off;Volume-�:�75;a�- --------- ---- N I I v I----I----T---- - -I---1----T----I----I----1---- ---- - -- -'---- Runoff Dep#h:2,78--- LL fic' I I I I I I I I I I 10 -------------r-------------T---- --------,---- ----r -20ck rain- I I I I I I I I I I � 6 ----'-- ____I_____I____ I --- --- -------- I -I I I I I I I �/n� ' 6 ----' - =' ----L----�----III L< AL5-- I 2 - --- ' ----I-- --'---- I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) APPENDIX B Watershed Computations , (Post-Development Drainage HydroCAD Report) ' 2P MAIN CA CHMENT A 1 WATER DUALITY ' BASIN 1 P)'*' 3P 1 OFFSITE DRAINAGE BY-PASS ' TO ELLINGTON ROAD WATERSHED 1R 1 TOTAL to Route 30 Drainage System ' SUbCat` each On Link Routing Diagram for 3574-Proposed Condition Prepared by Hewlett-Packard Company, Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 0 2015 HydroCAD Software Solutions LLC 3574- Proposed Condition 1 Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 2 Area Listing (selected nodes) ' Area CN Description (acres) (subcatchment-numbers) , 2.720 39 >75%Grass cover, Good, HSG A (1 P, 2P, 3P) 2.770 61 >75%Grass cover, Good, HSG B (2P, 3P) 1.890 74 >75%Grass cover, Good, HSG C (2P, 3P) , 1.420 98 IMPERVVOUS (2P) 0.520 98 IMPERVIOUS (1 P,3P) 0.540 36 Woods, Fair, HSG A (2P, 3P) ' 1.470 60 Woods, Fair, HSG B (2P, 3P) 0.220 73 Woods, Fair, HSG C (2P) 11.550 63 TOTAL AREA ' 11 1 i 1 ' 3574 - Proposed Condition Type l/l 24-hr 2 Rainfall=3.20" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD@ 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 3 ' Summary for Subcatchment 1 P: OFFSITE DRAINAGE TO ELLINGTON ROAD Runoff = 0.01 cfs @ 12.37 hrs, Volume= 0.002 af, Depth> 0.16" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Rainfall=3.20" ' Area (ac) CN Description 0.040 98 IMPERVIOUS ' 0.130 39 >75%Grass cover, Good, HSG A 0.170 53 Weighted Average 0.130 76.47% Pervious Area 0.040 23.53% Impervious Area ' Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) ' 5.0 Direct Entry, Subcatchment 1 P: OFFSITE DRAINAGE TO ELLINGTON ROAD ' Hydrograph 0.013 --- ---- -----i- ------- _ --- ---- --------i---- --- ---- ----1---- ---- 0.012 ------ r--- --- i----;--- O.OLcfs ---- ----i--------;-------- ---- —RUnOff 0.011 ---J----L----'---- ---- --- ----L- --'- 0.011 - ------ I I1 ' -L----_ L____L____II II Type-7[HII-24-.� Kr 0.01 I I I I 0.01 --- 0.009 -------- 1 --------=---- ' - - 4Ra!rtfaICi=120- _ 0.009 --- ---- -------- ---- --- ---- --'---- --np # - - - e--- II- - ---- ---------- u-- - --- - ►r- - �c - 0.008 -----___l____I____1____L___J_-__L _-I----J----L___J____L_---I---_ H 0.007 -- r-------------,---,----r -- R�nof# Volume=0.002;of- �- 0.007 ----I---- L ----'-- -----'----'- -- -'---- ----I-----1---------I---- ---- 0.006 --- ---r-------- ---- --------! - '---- -ROff D6�3#I��V. - 3 0 0.006 - - LL I I I I I I I I I -�+ I/� 0.005 --'---- ------------- --- ----r - - --------- ---1Oi 5117 n�in 0.004 ----'----r----'---- ---- --------- ------- ------ J-------- N ---- r--- --- --'---- - ----- ---- 0.003 I 0.002 ----�---- -------- ---- --- ---- -------- ---- --- - 1 0.001 ------ ----r----r--- ----r--------1 ----I---- --_ ----r----r--- ---- 0.001 ___-L____I____�----L___ -__ __ ____ ___ 1 _ 0 ' 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 3574 - Proposed Condition Type ///24-hr 2 Rainfall=3.20" ' Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD@ 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 213: MAIN CATCHMENT , Runoff = 2.89 cfs @ 12.10 hrs, Volume= 0.237 af, Depth> 0.50" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs , Type III 24-hr 2 Rainfall=3.20" Area (ac) CN Description , 1.420 98 IMPERIVOUS 0.410 36 Woods, Fair, HSG A , 1.860 39 >75%Grass cover, Good, HSG A 0.140 60 Woods, Fair, HSG B 0.470 61 >75%Grass cover, Good, HSG B 0.220 73 Woods, Fair, HSG C , 1.230 74 >75%Grass cover, Good, HSG C 5.750 64 Weighted Average 4.330 75.30% Pervious Area , 1.420 24.70% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/f0 (ft/sec) (cfs) ' 5.0 Direct Entry, Subcatchment 2P: MAIN CATCHMENT , Hydrograph --- r--------1 3 I- __ 2.89cfs _ I ---II I I I I I I I I I I I I I I Type III 24�hr 2 R, ainfall-3.20" I I I I I I I I I I I I I Runoff Area=5.750 ac ---- ---I---- ----L----I----1----L----I---- ;Runoff;VoWm6-0.�237;of I II ' Runoff Deptha0.50" LL I i I I I I I I I I I I Tc_510 min ! I I I I I I I I I � ! I I I I I I I I I C"N_ I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I 1 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 3574- Proposed Condition Type N 24-hr 2 Rainfall=3.20" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page-5 ' Summary for Subcatchment 3P: BY-PASS WATERSHED Runoff = 1.69 cfs @ 12.24 hrs, Volume= 0.197 af, Depth> 0.42" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Rainfall=3.20" ' Area(ac) CN Description 0.480 98 IMPERVIOUS ' 0.130 36 Woods, Fair, HSG A 0.730 39 >75%Grass cover, Good, HSG A 1.330 60 Woods, Fair, HSG B 2.300 61 >75%Grass cover, Good, HSG B ' 0.660 74 >75%Grass cover, Good, HSG C 5.630 62 Weighted Average 5.150 91.47% Pervious Area ' 0.480 8.53% Impervious Area Tc Length Slope Velocity Capacity Description _ min) (feet) (ft/ft) (ft/sec) (cfs) ' 4.0 360 0.0470 1.52 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 8.4 100 0.0750 0.20 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 12.4 460 Total Subcatchment 3P: BY-PASS WATERSHED Hydrograph —Runoff ;Type III 24.,hr 2 RainfallT3.20" 1 Runoff Area=5.630 ac W ;Runoff;VoI0me=0.;1 V of 3 Runoff DepthA.42" LL Plow Length, =460' 1 Tc=126A Min N=62 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 3574 - Proposed Condition Type 111 24-hr 2 Rainfall=3.20" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Pape 6 Summary for Reach 1 R: TOTAL to Route 30 Drainage System Inflow Area= 11.550 ac, 16.80% Impervious, Inflow Depth > 0.30" for 2 event Inflow = 1.70 cfs @ 12.24 hrs, Volume= 0.287 of , Outflow = 1.70 cfs @ 12.24 hrs, Volume= 0.287 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs , Reach 1 R: TOTAL to Route 30 Drainage System Hydrograph , 1.70 cfs -Inflow Outflow a Inflbw 'Area-11 .550 ac LL 1 ' 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 , Time (hours) ' 3574 - Proposed Condition Type 11124-hr 2 Rainfall=3.20" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page-7 ' Summary for Pond 6P: WATER QUALITY BASIN Inflow Area= 5.750 ac, 24.70% Impervious, Inflow Depth > 0.50" for 2 event Inflow 2.89 cfs @ 12.10 hrs, Volume= 0.237 of Outflow 0.25 cfs @ 15.48 hrs, Volume= 0.088 af, Atten= 91%, Lag=202.8 min Primary = 0.25 cfs @ 15.48 hrs, Volume= 0.088 of ' Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 67.74'@ 15.48 hrs Surf.Area=4,863 sf Storage= 6,853 cf ' Plug-Flow detention time= 273.6 min calculated for 0.088 of (37%of inflow) Center-of-Mass det. time= 161.4 min ( 1,006.7-845.3 ) ' Volume Invert Avail.Storage Storage Description #1 66.00' 24,673 cf Custom Stage Data(Prismatic) Listed below(Recalc) ' Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 66.00 3,093 0 0 67.00 4,051 3,572 3,572 ' 68.00 5,154 4,603 8,175 69.00 6,295 5,725 13,899 70.00 7,333 6,814 20,713 ' 70.50 8,508 3,960 24,673 Device Routing Invert Outlet Devices #1 Primary 67.50' 18.0" Round Culvert L=50.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/Outlet Invert= 67.50'/67.15' S= 0.0070 '/' Cc= 0.900 n= 0.013, Flow Area= 1.77 sf ' rimary OutFlow Max=0.24 cfs @ 15.48 hrs HW=67.74' (Free Discharge) 1=Culvert (Barrel Controls 0.24 cfs @ 2.08 fps) 3574 - Proposed Condition Type/1/24-hr 2 Rainfall=3.20" ' Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 8 Pond 6P: WATER QUALITY BASIN ' Hydrograph 3 ----r---r----r----i- r----i 2.89CfS -r----i----i----r----i-----r---r---- —InflOw --- I I—Primary Inflow Area=5.750 ac Peak E1ev-67.1,4' i---- 1--------- --- --- --Stor6ge-6s853,cf-- Ra►un ! CipiIvrt LL n_0.0113 1 - ---i-----r----�----i----T----�----- -T---- , i----r----i-U- 0 7 0 ,-- S4.007U T 0.25 cis 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 3574 - Proposed Condition Type III24-hr 10 Rainfall=4.70" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 02015 HydroCAD Software Solutions LLC Page-9 tSubcatchment 1 P: OFFSITE DRAINAGE TO ELLINGTON ROAD Hydrograph 0.11 ---- -------------=--------------------------------- ----'- +---- - 0.10cfs 1 0.1 ---- ----r�----I-----I-n---�r�---- 0.095 ----;---- -------------=, ---------; ------------ ----�Fye alh G4�11r-- ' 0.09 -----'--- ----------' ---------' --- '-----'-----y'---------'f----�'-[�----�/��---- T - 0.075 ----- I----T----r----I----T--------- ---r--Runoff-Area--0.170-hC-- ' 0.07 - ---------- -------I ------------------------ ---- y 0.065 -----__-_ ____ _---_ RunoffJ,/-ol4m�a.-009;Laf-- --- 00.055 ----I----1---- ---i----i----I--- - --T-----I:Wn frl.�e h�:�T�F��-- ' u 0.05 ----------------- - --------------------- T 0.045 -------- ------------------'---- - - ---- ------ 1�v=5�G in-- 0.04 ----'---- ---- J---- ----L--- -- -1--------=---- --------////J����\----L---- I 1 �3-- 0.035 ----I----r----r----I----r----I---- -- -r----I----7----r----I--- 0.03 ------ ----1----L --J----1----L--- ---- I --- 0.025 ------------ ------'---------'----'--------- I I I I I I I I ! ' 0.01 ----I____T____I----I____T____I-_- I----T- 0.005 ----'---- ---------'---- ----'---- I_ I I I - 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ' Subcatchment 213: MAIN CATCHMENT ' Hydrograph I I 1 I I I t I I 1 I I 9 ------------- -------- ----_ 18. cfs -'----1----L----'---- ----L- —Runoff I I I I I I I I I I I I ' ----I - I ----I ----i- I LI ----I IypI e 11LI 24;I hr_ 10airfalT4. - - - ---- --- ---- ---- _-- - l - - -- Runoff Area=5.750 ac 6 ---- ;---- ---- -------- ---------'---- ---- --------- -------------- - Runoff;VoWm6-0.606 of i I I i I I I 1 I I I --I-_-- ' I I I I I r---- ---- Ruhof -C�epthaT.-25"-- LL 1 1 1 4 ---- -----I ----- - ---- ----;-------Tc0- min - I I I I I I I I I I I I I I I I I I ! I I 1 I I ' 64 - 3 ----1---- ---- -------- ----+--- ---+---- ---- --- - I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 2 ----' ---- ---- ----'---- '---- --- '-- ------+---- ----'---- ---- ----1---- I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ' Time (hours) 3574 - Proposed Condition Type 11124-hr 10 Rainfall=4.70" ' Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD@ 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 10 Subcatchment 3P: BY-PASS WATERSHED ' Hydrograph f I , 1 5.98 CfS 6 -------- 1---- ---------+----+----1----------+---- ----I--------- ----,---- I ,Type III 24�hr 5 - ---- ---- --------- ---,---- - WR, a-hfall-A-7W --- 1 1 I I I I Runoff Area=5.630 ac , 4 - ---- ---- --- ----;Runoff �Tofium�=0: 32;af- I I I I , I I I , 1 N 3 ----1____ 1 �1 Runoff De----- 113 Plow Length, -460' CN=62 ' I I , I I I , I I , , I , 1----L____I_ J _1_ I_____ 1 __L____I_ I__--L--__I_ I I I I i I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 1 R: TOTAL to Route 30 Drainage System ' Hydrograph ' 6.91 Cfs —Inflow 7 ----,---- ----r-------- ---- ----,---- ------------- ----Ir----I---- ----I —Outflow Inflow Area=11 .550 ac ' 5 ----!----1---- --------'---- ----I - -----------!---- ------------------ I I --- ----------- 3 IL ! ' 3 -------- ---------I ----1- --- , -------- I -- I I , I I I I I I I I 1 I I I I I 2 ----I----T----1____I____ i__-_I____ -__-T_ __1-____I____T__-_r_-__I_-__T____ I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I 1 I I I I 1 I I I I I I I I I I I I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ' 3574 - Proposed Condition Type 11124-hr 10 Rainfall=4.70" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 11 i Pond 6P: WATER QUALITY BASIN Hydrograph ! --- 1 9 --------'---- ----'---- - -_ 8.77CfS i-------------i-------------i---- — InfIOW —Primary 8 ---- 1---- ---- 1--------- -----Inflow Ari,ea4,I .7-I, 0-aII c- ---- 8 -------- - -- ----i---P -.8Z- Storage�9860�cf 6 , v - ---- --- --- I I ■ ' Roiuno Cplvgrt a 4 - r---4--------r---- I n_0.013 3 ---------- --------+----I----1 2.510fs --------I----=----I--L , I , I I ■,v , ' I ! T ■ I I ! I I I I I 0■DQ7T7 - , I I I I I I , I I I I I , I I I I I , 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 3574 - Proposed Condition Type 111 24-hr 25 Rainfall=5.50" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 12 Subcatchment 1 P: OFFSITE DRAINAGE TO ELLINGTON ROAD i Hydrograph 0.2 ---- ---li----------------------- - ----'-- ----=----'- '---- '-----I --- 0.19 --- -- ---- ----'--------J----L---- —Runoff ----I --- I----�----�- 0.18cfs I I I I I I I I i I I I I I I I I I I 0.17 --------'----L--- ----1----I---- ---i--------J----T ! yp�e11 N 24�`h r- 0.16 ----i----j----f---- --- '---------------/��-■�------ ----L---- ' 0.14 ---- _--'----'-----`--I '--^--- ----1----L----'---------L---J ----- 0.13 ---------'----L---J----1----1----- - --- --Riunoff_Are 4.170 '�\i I I 0.12 --- ----JI ---- - --- --- ---- ----Juno#folm -0.o14 a -- w 0.11 ----'---- ---J----1----L--- v I I I I I I I I I ,.�.��I I I I 0.1 ----;---- ---------;---- ---- --- - -- ---- V111 1,}h�._0. �� 0.09 --__I____1____L___J — ____;____ _- �ln--I ----'---- - ----I---- 0.07 LL --_L___-I' 1____L___ 1____I__ J L____I____J__-_ 0.08 ____ ____ ___ --- I I I I I I I I I I � I I ! 0.05 -------- ----L--------1--------- -- -1----L 11----L----1---- ----L---- ' I I I I I I I I I I I I I 0.04 ---------' ---------'----=----'---- _ -- ---------------------------- _ I 0.03 --------1----L----1---- ----I---- ---- ----'---- ----J--------J----L---- I I I I I I I I I I I I 0.02 ---- -----' ----'- ----=-------- ---- '---- --- ----------------------- '----1----L---J I I I I I I I I I ! I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Subcatchment 213: MAIN CATCHMENT I ----Hydrograph 13 --------------�------------- , ----- i2.46cfs I , , I I I I _ - - I I I 11 ---- -- ' - = -T--p---IIIJ 24,-'hr -- -- -------- ---- ---- -y -- ---- --- 25 FW ' 114.50" - I I I I ! -1 8 -- ---- --- --1 ------ -Runoff-Ar-ea-5.75Qac-- , ---- --- --- ---i ---- IIRuto## Volur0. 39 a#-- v 3 7 -------- ---- ----,I--------I---- ------ -Runoff' DePtNl:75"-- 6 ----i---- ---- --- -I---- ---- --- --------- --- Tic-5�0 rYiin 5 ------------------ ------------- - ---------------- -------------r---- I I --- ----I ---D_N=64-- I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 2 --- ----=---- -------------------------------- --- --------------------- I I I I I I I I I I I I I I t I I I I I I I I I I I I I I I I I I I I I I I 1 I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ' 3574 - Proposed Condition Type 11/24-hr 25 Rainfall=5.50" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Paae 13 Subcatchment 3P: BY-PASS WATERSHED Hydrograph I I I I I i I I I I I I 9 ----I---- �----�----r---y----+-- 8.73cfS -----+----r----�----y----r----I---- —Runoff I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I s ----L----'---- --- ---- Type_l[L24;hr__ ----i---- 5 RainfallT5.50" I I I I I I I I I I I I Runoff Area=5.630 cac 6 ----'-----'-----------------------' ---'---- ---------'---- ---- --------- N I I ;Runoff;VOWMO=0.149;of i I I I I I I I I I I 5 -------- ----,----;----; - --,----T R-no fi-Depthai.VVI I I - I I I I I I I---- - ------T Phrn -Length-4$0'-, U. 4 ---I---- --r----I---- ----r --- I I I I I I I I I I I I I I I I}� -t, 3 - I---- i----rI ----I----7---- Y---- -----I----tI ---- I I I I I I I I I I ' 2 - ----;- r----------+----+--- I--- -----+--------------�-- N= 72- --_I, -- I I I I I I I I I I I � I I I I I I I I I I I I I I I I 1 ----'---- ----L----'---- ----i--- -----'--- ---- ----'---- ----L----'---- I I I I I I I I I I I I I I I I I I I I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 1 R: TOTAL to Route 30 Drainage System ' Hydrograph ' 14 ----II-----�i------- ------ --------J I----t1II ---------I-I ----I,I —Inw13 -------- ----I----I---- ----- Oufflo w 12 ---- inflVWArea -}+.550ac I I I I I I I I I I I I I I I I 10 - — - r- - r--- ----r----I - - ----r----r--- --------I-- -- -- --------------I - -_I---------I--_- ----------- I I 9 w8 -------- I-----=------------------ - -;--- --------------=---------'---- I I I I I I I I I I I I I 7 -- U. 6 - I I I I i I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 3 I I I -- ----------- -------------- - --- I I I I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ' Time (hours) 3574 - Proposed Condition Type 11124-hr 25 Rainfall=5.50" ' Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD010.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 14 Pond 6P: WATER QUALITY BASIN Hydrograph 13 ----;---- ----'-------- ----;- 12.46cfs - --------- — ;---------;---- Inflow —Primary I_ I I i I I i I I I n ow-Area=5.7vO aC- 10 ----'- � ---L----�----�----L---- II----i--P_+e2k_E-Irv--6$11'_- I I I I I I I I I I I I I I I I I 1 I I I I I I I 9 ----,---- ----;----,---- ----;---- --- ----LSWra0e-12-1-37,C#- i8 -___ --- ___ __L v I __-_ _ I�v■ LL -- ' RaOund C Iv rt 0 -I - I I I I I I I I I I I I 4.80cfs - �.O■Ol3 I I I i� 4 ________ ________ ,---_I__-_--t__+5-0 0�__ T ■ I I I I I I I I I I I cQ 2 --' ----I-- • --- -- ---- I I I I I I I I I I I I I I I I I i I I I � I I I 1 ----- ----'-- _ - ---- -'I I I I I I I I I I I I----- I I I I I I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ' 3574 - Proposed Condition Type 1/124-hr 100 Rainfall=6.90" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 15 Subcatchment 1 P: OFFSITE DRAINAGE TO ELLINGTON ROAD Hydrograph ' 0.38 -------- ---- --- I--------- --- -------_---- - -------- ---- I I I 0.36 I I I I I I I I I I ---------' ------------- ' - -- -----'- -----'----'-----, - 0.34cfs - -------- —Runoff --- I 0.34 ---------' -------------=---------' --------I-----'- ------------------- I i I I I I I I I I I I I ------ -r----' - ---r-------- ----I [ -- 0.3 ----r---�-- I I I - 1 I I I 0.28 ----- I 1 1----- ---T----,---100-F�ainfall�.�.9;O"-- 1 -Runoff-Area=-0:170-eC-- 0.22 ---- ---- -- ----+----,---- - ---+-- ---- ----+--------i---- ---- I - 0.2 -------- ----'L--- ----1---- --- ---Ru ioff,V_0lkir�'�e=(}._024,Laf-- w I ---_L__=J_---1____L-__ --_ __A J`-1_ 20.18 ------- ----'--- ---- ' ---- - - --------------I-- - - 0.16 - --- -- ----------- -- LL --- r�=5-0 rain- 0.12 - i----I------------- ----i---- - -- ----11---------;-------�]p4—_ 0.1 ---_ r--- r--- ---- ---I -- 1 -- -j----I---- ---- ----I---- ---- ,____-__ r---r--- r---- -I-- I I I 1 I 0.06 -------- ---- ----+---- --- -- -+----'---- ---- ----1---- ---- --- I I I I I I I I I I I I I I I 0.04 ----'---- ---- --- ----=----L-- - ---'---- ---- ----'---- - ! I I I 0.02 --------i----L--- ----' ----'--- J----L----'---- I-- --------J----L---- I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ' Subcatchment 2P: MAIN CATCHMENT Hydrograph 21 --- ----; ' 'I -_-_-_-_--J-----_--_ - 20 ----'-------- - 19. 2cfs _-_L_-------_ 19 - ----+---- - ---- ---- ----+---- --------- --_,-- 1I 1-_ --- - —Runoff - -,TypeAl-24ar - 17 ,I---- - , - faalT6 9 " ' -- I 1 -16 --- ----— - - -- --- --- --- ---101 am 15 1--- ---- -- -- ------ - ---- 14 --------=----=------------------ ------11Runbf_Are�-5.7 �ac-- R S. 13 --------J---- -------------1---- ---' - -- 1��/// -11L'-�■y�-�■-I--- �//�■■/��/�-_�/���L- -_' noff+J_OJ�LJJ�L� R'!1/Y}a - w 12 -------- ---- ---- --------- -- - I 10 ,-- r---- ----1---- ' 9 ----,----r---- ---- -- ---- -R_U Runoff-�e� 1192.70H-- --- -I---- ---- - - ----, TIC-5�0mlm-- 8 ------------------ ------------------------------------- _ 7 ---------------------------- ------ --'-----'----=----'-----'---- ' ----1 �-04-- 1 I -I- 2 r---iI I---- — I---i----,----'- -- ------------- --------- --- ----r---- I I I I I I I 1 I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 3574 - Proposed Condition Type 11124-hr 100 Rainfall=6.90" ' Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCAD®10.00-16 s/n 09320 02015 HydroCAD Software Solutions LLC Page 16 Subcatchment 313: BY-PASS WATERSHED Hydrograph - ------ -- ! 15 ----r ;- ----i-- -----I----r---------l---- -r---- ---- -- —Runoff , I I I I I I - I I I I 13 ---------- ----r------------- ---- ------------t----I-Typelll 24 hr-- 12 ---- ---- ---- ------------- ----, ---;-------1b0-RaTr>wfa11T6:90"-- 11 ----i---- ----+--- --- ---- ------- -----+----r--------i----*---- -- Runoff-Area=5.630 ac__ 10 -- ----r----r----;----,----r----; ---,- -, - -; - -, -- i H I I I 'Vol Me_ -41a#-9 ---- ---- --Ru6o##1 . _3 ---I Runoff De_0ft 2:50'-- C 7 I____1____1____I_____I____1-_-_ ._ _ I----J_-__-----L--_ -_-I___-L---- 6 � I I I I I i I I I I ------------- ---- ---- -- --I---- ---P.lomr-Lengtl=4_ 6W_- , I I I I 5 --- ---- --- --- ---- ---- ------------ --- T� t2A-Min-- 4 ; ----I -----I ----I---- N--62 3 - I-- ----I- -- I -- --- ' I r _____ I I I I I I I I I I 2 --------J----1____I_____---_ --- L__-_ __-J____1_--- - I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I -- -----f----T----�--------7-- -r----I -----------1----r---- I I I I I I I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 1 R: TOTAL to Route 30 Drainage System ' Hydrograph , 25 ---- 2 - , ---22-.66 c-fs- ---- ----II--- J----Y----=----f---- — w ;---- ___Lr--------I---- ,'- ------+ I - I-----II ---- ' —Inflo ---- ---- - , Outflow 22 ____--- I---- '--- '--- -- tN ]VW-Arta-11 .55aac-21 - I --- _ 20 ----19 - --------- I----+----18 1 -I. - I 17 15 ---- --- ----- ----J----r------------- ' --------=---------I- J--- +----' --------r---- I 16 ----I----r----I I r---- ----r----r--- -,,----r----I-----I---- ---------'--- I - -'-- -'---- .H 14 ----I----+-------------+----+---- - ------r----L----y---- ---------I---- 13 I ----I----- G ---' ---�----r-------- ---- ---- --- ----r- - ='- --- ----I ---- V_ ___ 12 9 --------- ----r----r---y----r---- -- -i----r----I---- +----+----r----I---- I 8 - I I 7 -------------r----r-------- ---- --------J----+---- -------- --- -- '----L----'---- ---- --- '--- I 3 __ -,---- ---- ----I- --- - - --I---- ----I-----'----- 1 --- -- ----r----i---- ----r-- -r--- ----r----i--- T I I I I I I I I -------a r -- ---- -- ---- r----- ----+---- ----'---- - -- I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ' 3574 - Proposed Condition Type 11124-hr 100 Rainfall=6.90" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Page 17 ' Pond 6P: WATER QUALITY BASIN Hydrograph 21 -------- --------'---------'----'----'---------'-----I----'-----'-----'---- , - 2 ---- I----'----------'----L- 19.52cfs J----L----I----J----r----'----J----J —Inflow —Primary 16 - ---- ----`----I---- t----F----I --- ----*----I---- ----*---------I---- 19 -- --- ---- i---- --- -Inflaw'F-Area-5■-,50-ac- 17 ----I-- QI ■^. Q, `, }AID ---j -----I----i----r---- --- ----i--■ �alf `hVY�V$. �,-- 16 -------- ----' ----I---- ---- ---- -------- -- I � � I � I I � 15 _ -I_ --------- -------- ------------- ------------------------------- ----- I I , I I I , I } , I .iI nA , 14 -------- ----I------------- ---- --- --- St©ra - �17,09 ';Vf- 13 ----'- ^ --- 1---- - ---r----- - 12 --------i----r----- --- --- ----}-------- - ■911 10 ----4----r-- I ------------ --- ----r--------r----r----I----7----r----,---- - ---- Round COvor# 11 ------- r--- ' 8.51 cfs 8 ----, --------I --- ---, ll--0.0-1a- ----I------ --- --------------- I I I , - , I , -I- , � '7 -__-_I____1-___L--_-I I----L--- 1 _-1----L----I---__I----' _--_I----J---- 6 ----I____1____L- 1L_-- __ JLIJ----L-��G■■J0�- -I �� -/■■ 4 --- ---- i----r----1---- ---- ----' - - 1----r--------ti-SO-.007Q'/ - 3 ----r--- ----r----I---- ----r-- - r--- ----r----r--- ---- I I ----------------------------- - -------------- -------- I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) APPENDIX C NRCS Soil Map & Data , 1 1 1 1 1 1 1 USDA United States A product of the National Custom Soil Resource ' Department of Cooperative Soil Survey, Agriculture a joint effort of the United Report for NRCSStates Department of Agriculture and other State of ' Federal agencies, State Natural agencies including the Resources Agricultural Experiment Connecticut ' Conservation Stations, and local Service participants 755 Ellington Road, South ' Windsor CT 10 r June 27, 2017 Preface Soil surveys contain information that affects land use planning in survey areas. ' They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for , many different users, including farmers, ranchers,foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste ' disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil , properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some , cases. Examples include soil quality assessments(http://www.nres.usda.gov/wps/ portal/nres/main/soils/healtho and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center ' (hops://offices.sc.egov.usda.gov/locator/app?agency=nres)or your NRCS State Soil Scientist(http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nres142p2_053951). Great differences in soil properties can occur within short distances. Some soils are , seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields.A high water table makes a soil poorly suited to ' basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the ' Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service(NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. , Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture(USDA)prohibits discrimination in all its , programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 , ' alternative means for communication of program information (Braille, large print, audiotape, etc.)should contact USDA's TARGET Center at(202)720-2600 (voice ' and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800)795-3272 (voice)or(202) 720-6382 (TDD). USDA is an equal opportunity ' provider and employer. 3 Contents Preface....................................................................................................................2 , SoilMap..................................................................................................................5 Soil Map............................ ... ............................................................. ....................6 .................................... ' Legend.............................. ................................................7 MapUnit Legend..................................................................................................8 MapUnit Descriptions.......................................................................................... 8 State of Connecticut........................................................................................10 , 21A—Ninigret and Tisbury soils, 0 to 5 percent slopes...............................10 28A—Elmridge fine sandy loam, 0 to 3 percent slopes...............................12 286—Elmridge fine sandy loam, 3 to 8 percent slopes...............................14 , 29C Agawam fine sandy loam, 8 to 15 percent slopes.............................16 36A—Windsor loamy sand, 0 to 3 percent slopes...................................... 18 366—Windsor loamy sand, 3 to 8 percent slopes...................................... 19 229B—Agawam-Urban land complex, 0 to 8 percent slopes......................20 , 304—Udorthents, loamy, very steep...........................................................22 306—Udorthents-Urban land complex........................................................24 1 4 ' Soil Map ' The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols ' displayed on the map.Also presented are various metadata about data used to produce the map, and a description of each soil map unit. ' 5 Custom Soil Resource Report Soil Map 3 M M n n 41°48'57"N WO 6 7000M 700150 700230 700310 700390 700470 700550 700630 g 41°48'57N g nS bS Q 41°4&41"N 52 YF 41°48'41"N e99910 899MO 700070 7=50 70023D 700310 700390 700470 700550 700530 3 3 Map Scale:1:3,430 if printed on A landscape(11"x 8.5")sheet Meters N N 0 50 100 200 300 ^ Feet 0 150 300 600 900 Map projection:Web Mercator Comer coordinates:WGS84 Edge tics:UTM Zone 18N WCS84 6 Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest(A01) Spoil Area The soil surveys that comprise your AOI were mapped at ❑ Area of Interest(AOI) Stony Spot 1:12,000. Soils a very Stony Spot p may Soil Map Unit Polygons Warning:Soil Ma not be valid at this scale. Y yr Wet Spot ,y Soil Map Unit Lines Enlargement of maps beyond the scale of ma g p y Aping can cause Soil Map Unit Points Other misunderstanding of the detail of mapping and accuracy of soil ,. Special Line Features line placement.The maps do not show the small areas of Special Point Features contrasting soils that could have been shown at a more detailed V Blowout Water Features scale. Streams and Canals Borrow Pit Transportation Please rely on the bar scale on each map sheet for map X Clay Spot ++.+f Rails measurements. 0 Closed Depression ,y Interstate Highways Source of Map: Natural Resources Conservation Service X Gravel Pit US Routes Web Soil Survey URL: Gravelly Spot Major Roads Coordinate System: Web Mercator(EPSG:3857) i Landfill Local Roads Maps from the Web Soil Survey are based on the Web Mercator A. Lava Flow Background projection,which preserves direction and shape but distorts distance and area.A projection that preserves area,such as the Marsh or swamp . Aerial Photography Albers equal-area conic projection,should be used if more Mine or Quarry accurate calculations of distance or area are required. 0 Miscellaneous Water This product is generated from the USDA-NRCS certified data as 0 Perennial Water of the version date(s)listed below. W Rock Outcrop Soil Survey Area: State of Connecticut ..¢,. Saline Spot Survey Area Data: Version 15,Sep 28,2016 a . Sandy Spot Soil map units are labeled(as space allows)for map scales .� Severely Eroded Spot 1:50,000 or larger. Sinkhole Date(s)aerial images were photographed: Mar 28,2011 Apr Slide or Slip 18,2011 Sodic Spot The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps.As a result,some minor shifting of map unit boundaries may be evident. 7 Custom Soil Resource Report I Map Unit Legend State of Connecticut(CT$ttQ) Map ul Symbol Map Unit Name Acres WA Percent ofA01 21A Ninigret and Tisbury soils,0 to 5 7.6 18.4% percent slopes 28A Elmridge fine sandy loam,0 to 1.8 4.3% 3 percent slopes 28B Elmridge fine sandy loam,3 to 0.2 0.5% 8 percent slopes ' 29C Agawam fine sandy loam,8 to 5.9 14.3% 15 percent slopes 36A Windsor loamy sand,0 to 3 7.2 17.4% ' percent slopes 36B Windsor loamy sand,3 to 8 6.6 15.9% percent slopes 229B Agawam-Urban land complex,0 4.1 10.0% , to 8 percent slopes 304 Udorthents,loamy,very steep 1.1 2.6% 306 Udorthents-Urban land complex 6.9 16.7% Totals for Area of Interest 41.3 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas.A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic , class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor ' components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They , generally are in small areas and could not be mapped separately because of the 8 Custom Soil Resource Report iscale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a ' given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each.A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. ' An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. ' Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition,thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example,Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas.Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered ' practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar.Alpha-Beta association, 0 to 2 percent slopes, is an example. ' An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform.An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them.Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil ' material and support little or no vegetation. Rock outcrop is an example. 9 Custom Soil Resource Report State of Connecticut 21A—Ninigret and Tisbury soils, 0 to 5 percent slopes , Map Unit Setting National map unit symbol. 2tx07 Elevation: 0 to 1,260 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period. 140 to 240 days Farmland classification: All areas are prime farmland Map Unit Composition Ninigret and similar soils: 60 percent Tisbury and similar soils: 25 percent Minor components: 15 percent ' Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ninigret Setting , Landform: Depressions, kames, kame terraces, outwash plains, outwash terraces, drainageways, moraines Landform position(two-dimensional): Backslope, shoulder, footslope, summit Landform position(three-dimensional): Side slope, crest, tread, dip, rise , Down-slope shape: Concave, convex, linear Across-slope shape: Concave, convex Parent material: Coarse-loamy eolian deposits over sandy and gravelly , glaciofluvial deposits derived from gneiss, granite, schist, and/or phyllite Typical profile Ap-0 to 8 inches: fine sandy loam Bw1-8 to 16 inches: fine sandy loam Bw2- 16 to 26 inches: fine sandy loam 2C-26 to 65 inches: stratified loamy sand to loamy fine sand Properties and qualities Slope: 0 to 5 percent Depth to restrictive feature: 18 to 38 inches to strongly contrasting textural stratification Natural drainage class: Moderately well drained Runoff class: Very low Capacity of the most limiting layer to transmit water(Ksat): Moderately low to high ' (0.14 to 14.17 in/hr) Depth to water table: About 17 to 39 inches Frequency of flooding: None ' Frequency of ponding. None Salinity, maximum in profile: Nonsaline to very slightly saline(0.0 to 2.0 mmhos/cm) Available water storage in profile: Low(about 3.4 inches) Interpretive groups Land capability classification(irrigated): None specified Land capability classification(nonirrigated): 2w ' Hydrologic Soil Group: C 10 Custom Soil Resource Report ' Hydric soil rating: No ' Description of Tisbury Setting Landform: Deltas, depressions, depressions, outwash plains, outwash terraces, ' valley trains Landform position(two-dimensional): Toeslope Landform position(three-dimensional): Tread, talf, dip Down-slope shape: Concave Across-slope shape: Concave Parent material: Coarse-silty eolian deposits over sandy and gravelly glaciofluvial deposits derived from granite, schist, and/or gneiss Typical profile Ap-0 to 8 inches: silt loam Bw1-8 to 18 inches: silt loam ' Bw2- 18 to 26 inches: silt loam 2C-26 to 65 inches: stratified extremely gravelly sand Properties and qualities ' Slope: 0 to 5 percent Depth to restrictive feature: 24 to 36 inches to strongly contrasting textural stratification Natural drainage class: Moderately well drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Moderately low to high (0.14 to 14.17 in/hr) ' Depth to water table: About 18 to 30 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline(0.0 to 2.0 mmhos/cm) Available water storage in profile: Low(about 4.3 inches) Interpretive groups ' Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2e Hydrologic Soil Group: C Hydric soil rating: No Minor Components ' Merrimac Percent of map unit: 5 percent Landform: Eskers, kames, outwash plains, outwash terraces, moraines Landform position(two-dimensional): Backslope, footslope, shoulder, summit ' Landform position(three-dimensional): Side slope, crest, riser, tread Down-slope shape: Convex Across-slope shape: Convex 1 Hydric soil rating: No Agawam Percent of map unit. 5 percent Landform: Karnes, kame terraces, outwash plains, outwash terraces, moraines ' Landform position(two-dimensional): Backslope, shoulder, footslope, summit Landform position(three-dimensional): Side slope, crest,tread, riser, rise 11 Custom Soil Resource Report Down-slope shape: Convex i Across-slope shape: Convex Hydric soil rating. No , Haven Percent of map unit. 3 percent Landform: Karnes, kame terraces, outwash plains, outwash terraces, moraines ' Landform position(two-dimensional): Shoulder, footslope, backslope, summit Landform position(three-dimensional): Side slope, crest, tread, riser, rise, dip Down-slope shape: Convex Across-slope shape: Convex Hydric soil rating. No Raypol Percent of map unit: 2 percent ' Landform: Deltas, depressions, depressions, outwash plains, outwash terraces, valley trains Landform position (two-dimensional): Toeslope ' Landform position (three-dimensional): Tread, talf, dip Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating. Yes ' 28A—Elmridge fine sandy loam, 0 to 3 percent slopes ' Map Unit Setting ' National map unit symbol: 91m0 Elevation: 0 to 1,200 feet Mean annual precipitation: 43 to 54 inches Mean annual air temperature: 45 to 55 degrees F ' Frost-free period: 140 to 185 days Farmland classification: All areas are prime farmland Map Unit Composition ' Elmridge and similar soils: 80 percent Minor components: 20 percent ' Estimates are based on observations, descriptions, and transects of the mapunit. Description of Elmridge Setting ' Landform: Terraces Down-slope shape: Concave Across-slope shape: Linear ' Parent material. Coarse-loamy eolian sands over clayey glaciolacustrine deposits Typical profile Ap-0 to 6 inches: fine sandy loam Bw1-6 to 10 inches: fine sandy loam Bw2- 10 to 18 inches: fine sandy loam 12 ' Custom Soil Resource Report ' Bw3- 18 to 25 inches: sandy loam 2C-25 to 65 inches: silty clay 1 Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches ' Natural drainage class: Moderately well drained Runoff class: Very low Capacity of the most limiting layer to transmit water(Ksat): Very low to moderately low(0.00 to 0.06 in/hr) ' Depth to water table: About 18 to 30 inches Frequency of flooding: None Frequency of ponding: None ' Available waterstorage in profile: Moderate(about 9.0 inches) Interpretive groups Land capability classification(irrigated): None specified ' Land capability classification(nonirrigated): 2w Hydrologic Soil Group: C Hydric soil rating: No ' Minor Components Belgrade Percent of map unit. 4 percent ' Landform: Terraces Down-slope shape: Linear Across-slope shape: Linear ' Hydric soil rating: No Brancroft Percent of map unit.- 4 percent ' Landform: Terraces Down-slope shape: Concave Across-slope shape: Linear Hydric soil rating: No ' Scitico Percent of map unit: 2 percent Landform: Depressions,terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating: Yes ' Shaker Percent of map unit. 2 percent Landform: Depressions, terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating: Yes ' Ninigret Percent of map unit. 2 percent Landform: Outwash plains, terraces Down-slope shape: Linear Across-slope shape: Concave Hydric soil rating: No 13 1 Custom Soil Resource Report ' Sudbury ' Percent of map unit. 2 percent Landform: Outwash plains,terraces Down-slope shape: Concave Across-slope shape: Linear Hydric soil rating: No ' Unnamed, red parent material Percent of map unit: 2 percent Hydric soil rating: No ' Berlin Percent of map unit: 1 percent Landform: Terraces Down-slope shape: Linear ' Across-slope shape: Linear Hydre soil rating: No Maybid Percent of map unit: 1 percent Landform: Depressions,terraces, drainageways Down-slope shape: Concave ' Across-slope shape: Concave Hydric soil rating: Yes 2813—Elmridge fine sandy loam, 3 to 8 percent slopes Map Unit Setting ' National map unit symbol: 91m1 Elevation: 0 to 1,200 feet Mean annual precipitation: 43 to 54 inches ' Mean annual air temperature: 45 to 55 degrees F Frost-free period: 140 to 185 days Farmland classification: All areas are prime farmland ' Map Unit Composition Elmridge and similar soils: 80 percent Minor components: 20 percent ' Estimates are based on observations, descriptions, and transects of the mapunit. Description of Elmridge ' Setting Landform: Terraces Down-slope shape: Concave ' Across-slope shape: Linear Parent material: Coarse-loamy eolian sands over clayey glaciolacustrine deposits Typical profile Ap-0 to 6 inches: fine sandy loam Bw1- 6 to 10 inches: fine sandy loam 14 t ' Custom Soil Resource Report Bw2- 10 to 18 inches: fine sandy loam Bw3- 18 to 25 inches: sandy loam ' 2C-25 to 65 inches: silty clay Properties and qualities Slope: 3 to 8 percent ' Depth to restrictive feature: More than 80 inches Natural drainage class: Moderately well drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Very low to moderately ' low(0.00 to 0.06 in/hr) Depth to water table: About 18 to 30 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate(about 9.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2w Hydrologic Soil Group: C Hydric soil rating: No Minor Components Brancroft ' Percent of map unit. 5 percent Landform: Terraces Down-slope shape: Concave Across-slope shape: Linear Hydric soil rating: No Shaker ' Percent of map unit: 3 percent Landform: Depressions,terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating: Yes Scitico Percent of map unit: 2 percent Landform: Depressions,terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave ' Hydric soil rating: Yes Ninigret Percent of map unit: 2 percent ' Landform: Outwash plains, terraces Down-slope shape: Linear Across-slope shape: Concave Hydric soil rating: No Sudbury Percent of map unit. 2 percent Landform: Outwash plains,terraces ' Down-slope shape: Concave Across-slope shape: Linear Hydric soil rating: No 15 Custom Soil Resource Report Belgrade Percent of map unit.- 2 percent Landform: Terraces ' Down-slope shape: Linear Across-slope shape: Linear Hydric soil rating: No ' Unnamed, red parent material Percent of map unit. 2 percent Hydric soil rating: No , Berlin Percent of map unit. 1 percent Landform: Terraces Down-slope shape: Linear Across-slope shape: Linear Hydric soil rating: No Maybid ' Percent of map unit: 1 percent Landform: Depressions, terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating: Yes 29C Agawam fine sandy loam, 8 to 15 percent slopes Map Unit Setting , National map unit symbol. 2tygy Elevation: 0 to 360 feet , Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period. 140 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition Agawam and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Agawam ' Setting Landform: Karnes, kame terraces, outwash plains, outwash terraces, moraines Landform position(two-dimensional): Backslope, shoulder,footslope, summit Landform position(three-dimensional): Side slope, crest, tread, riser, rise, dip Down-slope shape: Convex Across-slope shape: Convex ' Parent material: Coarse-loamy eolian deposits over sandy and gravelly glaciofluvial deposits derived from gneiss, granite, schist, and/or phyllite 16 Custom Soil Resource Report ' Typical profile Ap-0 to 11 inches: fine sandy loam ' Bw1- 11 to 16 inches: fine sandy loam Bw2- 16 to 26 inches. fine sandy loam 2C1 -26 to 45 inches: loamy fine sand ' 2C2-45 to 55 inches: loamy fine sand 2C3-55 to 65 inches: loamy sand Properties and qualities ' Slope: 8 to 15 percent Depth to restrictive feature: 15 to 35 inches to strongly contrasting textural stratification Natural drainage class: Well drained 1 Runoff class: Very low Capacity of the most limiting layer to transmit water(Ksat): Moderately low to high (0.14 to 14.17 in/hr) ' Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None 1 Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Low(about 3.4 inches) Interpretive groups ' Land capability classification(irrigated): None specified Land capability classification(nonirrigated): 3e Hydrologic Soil Group: B ' Hydric soil rating: No Minor Components ' Ninigret Percent of map unit. 5 percent Landform: Terraces Down-slope shape: Linear ' Across-slope shape: Concave Hydric soil rating: No Windsor Percent of map unit: 5 percent Landform: Deltas, dunes, outwash plains, outwash terraces Landform position(three-dimensional): Riser, tread Down-slope shape: Linear, convex Across-slope shape: Linear, convex Hydric soil rating: No ' Merrimac Percent of map unit: 5 percent Landform: Eskers, kames, outwash plains, outwash terraces, moraines Landform position(two-dimensional): Backslope, footslope, shoulder, summit Landform position (three-dimensional): Side slope, crest, riser,tread Down-slope shape: Convex Across-slope shape: Convex ' Hydric soil rating: No ' 17 Custom Soil Resource Report , 36A—Windsor loamy sand, 0 to 3 percent slopes , Map Unit Setting National map unit symbol. 2svkg , Elevation: 0 to 990 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition , Windsor, loamy sand, and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Windsor, Loamy Sand Setting Landform: Deltas, dunes, outwash plains, outwash terraces , Landform position(three-dimensional): Riser, tread Down-slope shape: Linear, convex Across-slope shape: Linear, convex ' Parent material: Loose sandy glaciofluvial deposits derived from granite and/or loose sandy glaciofluvial deposits derived from schist and/or loose sandy glaciofluvial deposits derived from gneiss Typical profile ' O-0 to 1 inches: moderately decomposed plant material A- 1 to 3 inches: loamy sand Bw-3 to 25 inches: loamy sand C-25 to 65 inches: sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Low ' Capacity of the most limiting layer to transmit water(Ksat): Moderately high to very high (1.42 to 99.90 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None ' Frequency of ponding. None Salinity, maximum in profile: Nonsaline to very slightly saline(0.0 to 2.0 mmhos/cm) Available water storage in profile: Low(about 3.6 inches) Interpretive groups Land capability classification(irrigated): None specified Land capability classification(nonirrigated): 2s Hydrologic Soil Group: A 18 ' Custom Soil Resource Report ' Hydric soil rating. No ' Minor Components Deerfield, loamy sand Percent of map unit., 10 percent ' Landform: Deltas, outwash plains,terraces Landform position(two-dimensional): Footslope Landform position(three-dimensional): Tread, talf Down-slope shape: Linear Across-slope shape: Linear Hydric soil rating: No Hinckley, loamy sand Percent of map unit. 5 percent Landform: Deltas, eskers, kames, outwash plains Landform position(two-dimensional): Summit, shoulder, backslope 1 Landform position(three-dimensional): Nose slope, side slope, crest, head slope, rise Down-slope shape: Convex Across-slope shape: Convex, linear ' Hydric soil rating. No ' 3613—Windsor loamy sand, 3 to 8 percent slopes Map Unit Setting National map unit symbol. 2svkf Elevation: 0 to 1,210 feet Mean annual precipitation: 36 to 71 inches ' Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition Windsor, loamy sand, and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Windsor, Loamy Sand ' Setting - Landform: Deltas, dunes, outwash plains, outwash terraces Landform position (three-dimensional): Riser,tread Down-slope shape: Linear, convex ' Across-slope shape: Linear, convex Parent material. Loose sandy glaciofluvial deposits derived from granite and/or loose sandy glaciofluvial deposits derived from schist and/or loose sandy glaciofluvial deposits derived from gneiss Typical profile O-0 to 1 inches: moderately decomposed plant material ' 19 Custom Soil Resource Report A - 1 to 3 inches: loamy sand Bw-3 to 25 inches: loamy sand C-25 to 65 inches: sand ' Properties and qualities Slope: 3 to 8 percent Depth to restrictive feature: More than 80 inches , Natural drainage class: Excessively drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Moderately high to very high (1.42 to 99.90 in/hr) ' Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None , Salinity, maximum in profile: Nonsaline to very slightly saline(0.0 to 2.0 mmhos/cm) Available waterstorage in profile: Low(about 4.5 inches) Interpretive groups , Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2s Hydrologic Soil Group: A , Hydric soil rating: No Minor Components ' Hinckley, loamy sand Percent of map unit: 10 percent Landform: Deltas, eskers, kames, outwash plains ' Landform position(two-dimensional): Summit, shoulder, backslope Landform position(three-dimensional): Head slope, nose slope, side slope, crest, rise Down-slope shape: Convex Across-slope shape: Convex, linear Hydric soil rating: No Deerfield, loamy sand Percent of map unit: 5 percent Landform: Deltas, outwash plains, terraces Landform position(two-dimensional): Footslope ' Landform position(three-dimensional): Tread, talf Down-slope shape: Linear Across-slope shape: Linear Hydric soil rating: No ' 229B—Agawam-Urban land complex, 0 to 8 percent slopes , Map Unit Setting National map unit symbol: 91kd ' Elevation: 0 to 1,200 feet Mean annual precipitation: 43 to 56 inches 20 ' ' Custom Soil Resource Report ' Mean annual air temperature: 45 to 55 degrees F Frost-free period. 140 to 185 days ' Farmland classification: Not prime farmland Map Unit Composition Agawam and similar soils: 40 percent ' Urban land: 35 percent Minor components: 25 percent Estimates are based on observations, descriptions, and transects of the mapunit. ' Description of Agawam Setting ' Landfonn: Outwash plains, terraces Down-slope shape: Linear Across-slope shape: Linear Parent material. Coarse-loamy eolian deposits over sandy and gravelly 1 glaciofluvial deposits derived from granite and/or schist and/or gneiss Typical profile Ap-0 to 8 inches: fine sandy loam ' Bw1-8 to 14 inches: fine sandy loam Bw2- 14 to 24 inches: fine sandy loam 2C-24 to 60 inches: stratified very gravelly coarse sand to fine sand ' Properties and qualities Slope: 0 to 8 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 5.95 in/hr) ' Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None ' Available water storage in profile: Low(about 4.8 inches) Interpretive groups Land capability classification(irrigated): None specified ' Land capability classification(nonirrigated): 2e Hydrologic Soil Group: B Hydric soil rating. No ' Description of Urban Land Typical profile H-0 to 6 inches: material ' Interpretive groups Land capability classification(irrigated): None specified Land capability classification(nonin'igated): 8 ' Hydrologic Soil Group: D Hydric soil rating: Unranked ' Minor Components Hinckley Percent of map unit. 5 percent 21 1 Custom Soil Resource Report Landform: Eskers, kames, outwash plains, terraces ' Down-slope shape: Convex Across-slope shape: Convex , Hydric soil rating: No Merrimac Percent of map unit. 5 percent ' Landform: Karnes, outwash plains, terraces Down-slope shape: Linear Across-slope shape: Linear Hydric soil rating: No ' Walpole Percent of map unit. 5 percent Landform: Depressions on terraces, drainageways on terraces , Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating: Yes , Udorthents Percent of map unit: 5 percent Down-slope shape: Convex ' Across-slope shape: Linear Hydric soil rating: No Scarboro ' Percent of map unit. 3 percent Landform: Depressions, terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave ' Hydric soil rating: Yes Unnamed, red parent material Percent of map unit. 2 percent ' Hydric soil rating: No 304—Udorthents, loamy, very steep Map Unit Setting ' National map unit symbol. 91md Elevation: 0 to 1,200 feet , Mean annual precipitation: 37 to 52 inches Mean annual air temperature: 45 to 55 degrees F Frost-free period: 140 to 185 days Farmland classification: Not prime farmland , Map Unit Composition Udorthents and similar soils: 90 percent ' Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. 22 Custom Soil Resource Report Description of Udorthents ' Setting Landform: Escarpments Landform position(three-dimensional): Riser ' Down-slope shape: Convex Across-slope shape: Linear Parent material. Glaciolacustrine deposits ' Typical profile A-0 to 5 inches: loam C1-5 to 21 inches: gravelly loam ' C2-21 to 80 inches: very gravelly sandy loam Properties and qualities Slope: 25 to 70 percent Depth to restrictive feature: More than 80 inches ' Natural drainage class: Well drained Runoff class: Very high Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 ' to 1.98 in/hr) Depth to water table: About 54 to 72 inches Frequency of flooding: None Frequency of ponding: None ' Available water storage in profile: Moderate (about 6.8 inches) Interpretive groups Land capability classification(irrigated): None specified ' Land capability classification(nonirrigated): 7e Hydrologic Soil Group: B Hydric soil rating: No ' Minor Components Shaker Percent of map unit: 3 percent Landform: Depressions, terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating: Yes Scitico Percent of map unit. 3 percent ' Landform: Depressions, terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave 1 Hydric soil rating: Yes Maybid Percent of map unit: 2 percent ' Landform: Depressions,terraces, drainageways Down-slope shape: Concave Across-slope shape: Concave Hydric soil rating: Yes ' Raynham Percent of map unit: 1 percent ' 23 Custom Soil Resource Report Landform: Depressions, drainageways Down-slope shape: Concave Across-slope shape: Concave ' Hydric soil rating. Yes Unnamed,frequently flooded Percent of map unit: 1 percent , Landform: Drainageways Hydric soil rating: Yes 306—Udorthents-Urban land complex Map Unit Setting , National map unit symbol. 91mg Elevation: 0 to 2,000 feet Mean annual precipitation: 43 to 56 inches , Mean annual air temperature: 45 to 55 degrees F Frost-free period. 120 to 185 days Farmland classification: Not prime farmland Map Unit Composition ' Udorthents and similar soils: 50 percent Urban land. 35 percent , Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Udorthents , Setting Down-slope shape: Convex Across-slope shape: Linear Parent material: Drift Typical profile , A-0 to 5 inches: loam C1 5 to 21 inches: gravelly loam C2-21 to 80 inches: very gravelly sandy loam Properties and qualities ' Slope: 0 to 25 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained , Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 1.98 in/hr) Depth to water table: About 54 to 72 inches ' Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate(about 6.8 inches) ' 24 , ' Custom Soil Resource Report ' Interpretive groups Land capability classification(irrigated): None specified ' Land capability classification(nonirrigated): 3e Hydrologic Soil Group: B Hydric soil rating: No ' Description of Urban Land Typical profile H-0 to 6 inches: material Interpretive groups Land capability classification(irrigated): None specified ' Land capability classification(nonirrigated): 8 Hydrologic Soil Group: D Hydric soil rating: Unranked ' Minor Components Unnamed, undisturbed soils Percent of map unit. 8 percent ' Hydric soil rating: No Udorthents,wet substratum Percent of map unit: 5 percent ' Down-slope shape: Convex Across-slope shape: Linear Hydric soil rating: No ' Rock outcrop Percent of map unit: 2 percent Hydric soil rating: No ' 25 APPENDIX D ' Onsi[e Sturm Sewer Analysis 1 1 1 1 1 1 Hydraflow Storm Sewers Extension for Autodesk0 AutoCADO Civil 3D0 Plan CB 2 15 CB 1 14 CB 9 CB 3 13 16 12 4(TYPE II) 1 ST?AH 1 OS 1 B 5 II) utfall 8 9 2 CB 6 CB 14 CB 8 CB 10 Outfall 10 11 CB 7 3 6 CB 13 CB 11 4 5 CB 12 Project File: 3574-STORM SEWERS.stm Number of lines:16 T—Date'6)2912017 Scorn,Sewers 00.50 Storm Sewer Tabulation Pagel Station Len Drng Area Rnoff Area x C Tc Rain Total Cap Vol Pipe Invert Elev HGL Elev Grnd/Rim Elev Line ID coeff (1) flow full Line To Incr F(ac l Incr Total Inlet Syst Size Slope Dn Up Dn Up Dn Up Line (ft) (ac) (C) (min) (min) (in/hr) (cfs) (cfs) (ft/s) (in) (%) (ft) (ft) (ft) (ft) (ft) (ft) 1 End 19.000 0.00 5.40 0.00 0.00 1.83 0.0 12.8 4.3 10.09 16.09 7.05 18 2.00 60.85 61.23 61.91 62.45 70.54 68.50 ST MH 1 to Exist. 2 1 57.000 0.48 5.40 0.33 0.16 1.83 10.0 12.7 4.4 7.99 11.38 5.48 18 1.00 61.23 61.80 62.45 62.89 68.50 65.30 CB-14 to STMH-1 3 2 284.000 0.27 4.92 0.29 0.08 1.67 10.0 11.9 4.5 7.48 11.52 6.58 15 2.71 61.80 69.50 62.89 70.59 65.30 73.00 CB-13 to CB-14 4 3 196.000 0.48 4.65 0.28 0.13 1.59 10.0 11.4 4.6 7.26 9.40 6.44 15 1.81 69.50 73.04 70.59 74.12 73.00 77.30 CB-12 to CB-13 5 4 196.000 2.80 4.17 0.35 0.98 1.46 10.0 10.9 4.6 6.78 7.00 6.11 15 1.00 73.04 75.00 74.12 76.05 77.30 78.50 CB-11 to CB-12 6 5 161.000 1.37 1.37 0.35 0.48 0.48 10.0 10.0 4.8 2.30 5.51 3.00 15 0.62 75.00 76.00 76.05 76.61 78.50 79.50 CB-10 to CB-11 7 1 33.000 0.00 0.00 0.00 0.00 0.00 0.0 0.0 0.0 2.15 12.52 4.46 18 1.21 64.50 64.90 64.92 65.45 68.50 70.50 OS-1 to STMH-1 8 End 129.000 0.39 5.03 0.60 0.23 2.33 8.0 12.0 4.5 10.42 11.38 5.90 18 1.00 67.40 68.69 70.92 72.00 67.40 72.86 CB-5 to FE-1 9 8 86.000 0.18 0.95 0.61 0.11 0.61 8.0 8.6 5.1 3.08 3.86 3.92 12 1.00 68.69 69.55 72.81 73.36 72.86 73.73 CB-6 to CB-5 10 9 62.000 0.47 0.77 0.62 0.29 0.50 8.0 8.3 5.2 2.55 3.86 3.25 12 1.00 69.55 70.17 73.50 73.77 73.73 74.40 CB-7 to CB-6 11 10 22.000 0.30 0.30 0.68 0.20 0.20 8.0 8.0 5.2 1.06 3.86 1.35 12 1.00 70.17 70.39 74.02 74.04 74.40 74.40 CB-8 to CB-7 12 8 22.000 0.35 3.69 0.58 0.20 1.49 8.0 11.9 4.5 6.69 8.04 3.79 18 0.50 69.45 69.56 72.81 72.89 72.86 72.89 CB-4 to CB-5 13 12 86.000 0.08 0.34 0.73 0.06 0.24 8.0 10.9 4.7 1.11 2.73 1.42 12 0.50 69.56 69.99 73.22 73.30 72.89 73.77 CB-3 to CB-4 14 13 128.000 0.17 0.26 0.74 0.13 0.18 8.0 9.0 5.0 0.90 2.73 1.15 12 0.50 69.99 70.63 73.32 73.39 73.77 72.90 CB-2 to CB-3 15 14 22.000 0.09 0.09 0.61 0.05 0.05 8.0 8.0 5.2 0.29 2.73 0.36 12 0.50 70.63 70.74 73.42 73.42 72.90 72.90 CB-1 to CB-2 16 12 119.000 3.00 3.00 0.35 1.05 1.05 10.0 10.0 4.8 5.05 7.05 4.11 15 1.02 69.56 70.77 73.22 73.84 72.89 72.50 CB-9 to CB-4 Project File: 3574-STORM SEWERS.stm Number of lines:16 Run Date: 6/29/2017 NOTES:Intensity=54.74/(Inlet time+10.80)^0.80; Return period=Yrs.10 c=cir e=ellip b=box Storm Sewers 00.50 rr rr r■ rr r� r r rr r rr rr � r■ r rr rr r r r Inlet Report Pagel Line Inlet ID Q= Q Q Q Junc Curb Inlet Grate Inlet Gutter Inlet Byp No CIA carry rapt Byp Type Line Ht L Area L W So W SW Sx n Depth Spread Depth Spread Depr No (cls) (S) (S) (cfa) (in) (ft) ($4ft) (ft) (ft) (ftfft) (ft) (ftfft) (M) (ft) (ft) (ft) (ft) (in) 1 ST MH 1 0.00 0.00 0.00 0.00 MH 0.0 0.00 0.00 0.00 0.00 gag 0.00 0.000 0.000 0.013 0.00 0.00 0.00 0.00 0.0 Off 2 CB 14 0.76 0.01 0.67 0.10 Grate 0.0 0.00 0.00 2.72 1.70 3.028 9.00 0.008 0.008 0.250 0.22 26.88 0.18 12.50 1.0 Off 3 CB 13 0.38 0.03 0.39 0.01 Grate 0.0 0.00 0.00 2.72 1.70 3.019 9.00 0.036 0.036 0.250 0.32 8.86 0.17 2.50 1.0 4 CB 12 0.65 0.00 0.62 0.03 Grate 0.0 0.00 0.00 2.72 1.70 1013 9.00 0.020 0.020 0.250 0.33 16.40 0.19 5.50 1.0 5 CB 11 4.71 0.00 4.71 0.00 Grate 0.0 0.00 4.62 2.72 1.70 Sag 9.00 0.013 0.013 0.013 0.41 31.89 0.50 31.89 1.0 Off 6 CB 10 2.30 0.00 2.30 0.00 Grate 0.0 0.00 4.62 2.72 1.70 Sag 9.00 0.019 0.019 0.013 0.27 14.03 0.35 14.03 1.0 Off 7 OS 1 2.15* 0.00 2.15 0.00 Grate 0.0 0.00 3.10 1.55 2.00 Sag 2.00 0.050 0.020 0.013 0.31 12.27 0.31 12.27 0.0 Off 8 CB 5(TYPE II) 1.22 0.39 1.61 0.00 Comb 3.0 5.83 9.79 5.83 1.68 Sag 13.00 0.031 0.031 0.013 0.18 5.71 0.26 5.71 1.0 Off 9 CB 6 0.57 0.58 0.76 0.39 Comb 4.0 2.72 0.00 2.72 1.70 3.010 13.00 0.031 0.031 0.013 0.17 5.35 0.20 3.87 1.0 10 CB 7 1.52 0.00 0.94 0.58 Comb 4.0 2.72 0.00 2.72 1.70 3.010 13.00 0.031 0.031 0.013 0.19 5.97 0.21 4.19 1.0 11 CB 8 1.06 0.00 0.72 0.34 Comb 4.0 2.72 0.00 2.72 1.70 3.010 13.00 0.031 0.031 0.013 0.16 5.23 0.19 3.55 1.0 12 12 CB 4(TYPE 11) 1.06 0.38 1.44 0.00 Comb 3.0 5.83 9.79 5.83 1.68 Sag 13.00 0.031 0.031 0.013 0.17 5.36 0.25 5.36 1.0 Off 13 CB 3 0.30 0.00 0.26 0.04 Comb 4.0 2.72 0.00 2.72 1.70 1010 13.00 0.031 0.031 0.013 0.10 3.26 0.13 1.61 1.0 12 14 CB 2 0.66 0.00 0.50 0.16 Comb 4.0 2.72 0.00 2.72 1.70 1017 13.00 0.031 0.031 0.013 0.12 3.94 0.16 2.58 1.0 Off 15 CB 1 0.29 0.00 0.26 0.03 Comb 4.0 2.72 0.00 2.72 1.70 1017 13.00 0.031 0.031 0.013 0.09 2.90 0.12 1.29 1.0 Off 16 CB 9 5.05 0.00 5.05 0.00 Grate 0.0 0.00 4.62 2.72 1.70 Sag 9.00 0.030 0.030 0.013 0.45 14.93 0.53 14.93 1.0 Off Project File: 3574-STORM SEWERS.stm TNumber of lines:16 Run Date: 6/29/2017 NOTES: Inlet N-Values=0.016;Intensity=54.74/(Inlet time+10.80)^0.80; Return period=10 Yrs.; *Indicates Known Q added. All curb inlets are Horiz throat. Storm Sewers 00.50 APPENDIX E ' Water Quality Calculations , 1 3574 - Proposed Condition Type 11124-hr 100 Rainfall=6.90" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC ' Summary for Pond 8P: FOREBAY [43] Hint: Has no inflow(Outflow=Zero) Volume Invert Avail.Storage Storage Description #1 66.00' 703 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store ' (feet) (sq-ft) (cubic-feet) (cubic-feet) 66.00 291 0 0 67.00 523 407 407 1 3574 - Proposed Condition Type 11124-hr 100 Rainfall=6.90" Prepared by Hewlett-Packard Company Printed 6/29/2017 HydroCADO 10.00-16 s/n 09320 ©2015 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 6P: WATER QUALITY BASIN , Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) , 66.00 3,093 0 68.60 5,839 11,472 66.05 3,141 156 68.65 5,896 11,766 66.10 3,189 314 68.70 5,953 12,062 66.15 3,237 475 68.75 6,010 12,361 66.20 3,285 638 68.80 6,067 12,663 66.25 3,333 803 68.85 6,124 12,968 66.30 3,380 971 68.90 6,181 13,275 ' 66.35 3,428 1,141 68.95 6,238 13,586 66.40 3,476 1,314 69.00 6,295 13,899 66.45 3,524 1,489 69.05 6,347 14,215 66.50 3,572 1,666 69.10 6,399 14,534 66.55 3,620 1,846 69.15 6,451 14,855 66.60 3,668 2,028 69.20 6,503 15,179 66.65 3,716 2,213 69.25 6,555 15,505 66.70 3,764 2,400 69.30 6,606 15,834 ' 66.75 3,812 2,589 69.35 6,658 16,166 66.80 3,859 2,781 69.40 6,710 16,500 66.85 3,907 2,975 69.45 6,762 16,837 66.90 3,955 3,172 69.50 6,814 17,176 ' 66.95 4,003 3,371 69.55 6,866 17,518 67.00 4,051 3,572 69.60 6,918 17,863 67.05 4,106 3,776 69.65 6,970 18,210 67.10 4,161 3,983 69.70 7,022 18,560 ' 67.15 4,216 4,192 69.75 7,074 18,912 67.20 4,272 4,404 69.80 7,125 19,267 67.25 4,327 4,619 69.85 7,177 19,625 67.30 4,382 4,837 69.90 7,229 19,985 67.35 4,437 5,057 69.95 7,281 20,348 67.40 4,492 5,281 70.00 7,333 20,713 67.45 4,547 5,507 70.05 7,450 21,083 70.10 7,568 21,458 67.55 4,658 5,967 70.15 7,686 21,839 67.60 4,713 6,201 70.20 7,803 22,227 67.65 4,768 6,438 70.25 7,921 22,620 67.70 4,823 6,678 70.30 8,038 23,019 67.75 4,878 6,920 70.35 8,155 23,423 67.80 4,933 7,166 70.40 8,273 23,834 67.85 4,989 7,414 70.45 8,391 24,251 67.90 5,044 7,665 70.50 8,508 24,673 67.95 5,099 7,918 68.00 5,154 8,175 68.05 5,211 8,434 ' 68.10 5,268 8,696 68.15 5,325 8,960 68.20 5,382 9,228 68.25 5,439 9,499 68.30 5,496 9,772 68.35 5,553 10,048 68.40 5,610 10,327 ' 68.45 5,667 10,609 68.50 5,725 10,894 68.55 5,782 11,182 1 School House Drive—DPI Project No.:3574 1 June 27, 2017 Water Ouality Volume Calculations for Drvwell Drainage 1 Per 2004 Connecticut Stormwater Quality Manual, Section 7.4.1: Water Quality Volume (WQV) _ (1")(R)(A)/12, where: ! R=unitless volumetric runoff coefficient=0.05 +0.009(I), where: I=percent impervious cover of drainage area=24.70% R=0.05 +0.009(I) 1 R=0.05 +0.009(24.70) R=0.272 1 A=drainage area in acres = 5.75 acres WQV= (1")(R)(A acres)/12 inches per foot 1 WQV= (1")(0.272)(5.75 acres)/12 inches per foot WQV=0.130 acre-feet required =5,677.32 cft 1 Proposed BMP The proposed water quality basin and forebay are proposed to provide 5,735 cft&703 cft of water quality storage respectively. The forebay and basin storage w/forebay combined,provide greater than 1 10% and 100% of the total water quality volume for the site respectively. 1 i i 1 1 1 1 1 1 APPENDIX F ' Drainage Area Maps ■ 1 1 1 R F R N ES TMI PLAN REFERS TO THE PIAN EN111LED'PROPER,Y h TOPOG�WHIC SURVEY RSK KELLOO INC 755 EWNGTON ROAD SU SOUTH WINOSOR CONNECTICUP PREPARED FOR RSK\ K..O DATED:6-24-2016 SCALE:1'=40' 0 = 1 DRAINAGE AB Ea NOTES, a I I I1 J/ \ l I A. 1. DATMPERVIOUS COVERAGE ON ABUTTING PROPERTIES ES ASSUMED FROM SO WINOSOR GIS MAP N $e I Y, ' /1 I1 ts CD•� �< I If N �s 1 (I I I I I / 1 I \ I (IIIII I11 I l I a / / / I 1 / \ 36A ( HSG A" /_ / \ " ) 21A j \ \ ` I / \ \ I I //�( \\ j////' (HSG .,C")/ FRONTIER2327 / /11111j111111 1 l//Ill r\\ l / I sVET2a2/wi� i 1 111111111 I 1 /lll)ll / I N5 /F SOUTH W/NOSOR I E / l (III 1I / 1 III N/STOR/83 9ci /TYl 1 / I 832}°GJ I N/F \ I ) I / / /!l (III\\\\ / / / I \ I EXISTING WATERSHED/1 \ \�\ \ 3 ➢, y I It / 1 ^ \ J / (�. R/MEoL. FUND/ TRS IN ,/ ! / / / / TOTAL AREA = 11.55 ACRES \ \ \ y 66A g Isa llI (✓OL. 490 PG. 209J /l IMPERVIOUS AREA=0.74 ACRES �306 / I I 5 k ld ���« ,(HSG p�) \ / 1 p _ (SEE DRAINAGE AREA NOTE 1 $g� �jlb d // FF6 T:F s.,.�_ LF F \l 1 / / / I 1 ' ! I/( 1 A"SOILS WOODED A 3.59 9AORES ACRES 1 I I \ 111 11(V/ / / p� OZYN/ N d IRE I // , / \ \ 1 I\ 111 / '('T ( f 1 — (✓OL. \ I %// I /, ,� / \ ` (\ GRASS AREA — 1.50 ACRES 111 / / ^\ 1 \ 1 1 I 1 /// / \ ) \ ROW CROP AREA= 1.41 ACRES / I �,,, Z / _ \ \ l//lI l / /\\ / 1 I / Z��o 1\X\ / u yy 1 3— \ 1 ` / / "8"SOILS=AREA ACRES 1 I N \ / `"r / \ ) > /36A l 1 \ , 'J / / WOODED AREA= 1.75 ACRES I \ \ r� I / Q OZ O I / ( / �j f qi 1 UZ/EIIA0, K I I l 1 ` �( / GRASS AREA = 2.42 ACRES 1 \ \ \ ° U 0�v �<IHSG A" / N/ % \ ROW `I // 'r ) (OL. B35 2 I 1 I / / "C"SOILSCR02.97 ACRES.08 ACRES I \ \ \ w Z 3 36,� / \ \ \ rE� /// /^ \ "\IIIII\1 1 /// , / 1 \ \/' /�```� ` I \ G. \ //'/ / / WOODED AREA=0.27 ACRES 1 L, / /( // ,/ �1 a0i u�=O ' p / \HSG A")\\ ^ ' GRASS AREA =0.30 ACRES ✓OL.\ 2/ , / / / / ROW CROP AREA= 2.40 ACRES 1 1 \ �F 1 �/ J / l 368 I ,) ArAK �71, / 4 HS A' �I / I (uQL� 272J /// J 1 ) I \11 \/ I I " ) \\ \ // / / i yT / HSG211A II SIC I B )\ !1 I �� `\ / / f I /4I/ I I �)I I 1 11 ( l -` \ T- fi -1 "1 1 1!//i . 1/ I I I I ,l 1 I I I I /Ill J V / / 1 I 1 I , 1 y I 306 / / 6 I 1 \ / \ �_ / I i / 1 1 1 I I / / l ! 1 /Ill I1 I I 1 I ' \\ (HG ' ) /x\ 1 --- I 1 1 I I I I / / / ' !/ II I 1 1 W V 0� I I I \I t I I / I 11 1 1 1 ' I \� ` I/ / I `°o it I I II I / / / X/ j, /�I ! II I I I / 1 ` \\ I p ! 1 \ �\ , / /'� \,' � 1\ I j�l I I I I I I/i / //I1 \\ \. `\\`\ \\ (\•�\ 1 I I ,' / / I, / \ )p' � / O o a � IIfit— Wi \ \ `\Ni�� �298 / `� I / ��\\ \� (/� -l•' zn�AwERF�N,a \ 11 \ / 1 / /� / , / - l /I/ l �j �/" �\ I I I I I I I 1 1 \ I/ \ HSG-=B"Y \�� / \ I � 2Qa y / ` \/ /, \♦ 1\ \ 1 \ , / / // / I \ _ ` `\\\ \ \ 1 N/F\ I / / , , / / / / / /\ ! N/F 1 1 \ \ \ `\ / LANG/LLE, SNANEIK.Ig�Rl AIM( 36A I o � / / / / / / /�/ 2/45 I�G.I 5$J / A a a R kr w1 HSG "AP) / / � 1\ it r-j 1 � \�\. \ 21A \ / ! I I / 6 1 l / (HMi)\ \11�1 \ \ I (HSG "C") / , i 1 /� H c/�N 11 zsc� 1 i i I I I i / / 1 I li\ !i i 1 I _�'� / V) JI \\ , ' \ \ ' ' I /'i S_ ) I / / //' / / I HSG ` / O G' ( �```\�INA III"\ ( 1 ) I I I I / / / / / I I j 11 1 1 I I i \ ( w ' W j 6/ C.EPI L. (.VOL. 2293 PG. 294J / �" F \ I �!) f „B �21A% �� t\ / 1 1\ // \ 1\ YC"} \ \ ` \ 1 I 1 1 \ \ \\ / / / \(MSG/ / 1 I LJ r� \ I N Z Q \ if i 1 / Z O W I `\ r^(\`/ N 2 Q � \\ \I ( \ 1 I I I I I I I 1 1/ 1 \ 1 1 / 1 1 1 \\` Lu / 1 I I / 1 \( \ \ I 1 1 \ \ ( 1` -� '/ / / I / W O O SNEEi i OF 2 I / 1H1 PLAN ENTITLED TOPOGRAPHIC SURVEY RSK KELLCO INC 755 EWNGTON ROAD u� F j rxY 6 760 PLEASANT VALLEY ROAD SOUTH WWDSOR CONNECTICUI'PREPARED FOR RSK KELLCO 7Y , u DATED:6-24-2016 SCALE:1'-40• 10F1Q 'yy5 / A DRAINAGE AREA NOTES: 1. IMPERVIOUS COVERAGE ON ABUTTING PROPERTIES ASSUMED FROM SOUTH WINDSOR GIS MAP a s OATA. CATCHMENT DRAINAGE a = AREAS I 'ou \ BASIN DETALS e TOTAL AREA-0.09 ACRES PROPOSED WATERSHED#2 GRASS:0.04 ACRES 0 MAIN CATCHMENT AREA CB#1 IMPERVIOUS ACRES i TOTAL AREA 5.71.42C ACRES _- S / _ TO To-8 MINUTES _ IMPERVIOUS AREA TOTAL AREA-0.17 ACRE 4 1g j CRASS:0.04 ACRES T e$ 5@p 1n F "A"SOILS -2.27 ACRES - _ G0,7q' CB#2 IMPERVIOUS 013 ACRES s WOODED AREA=0.41 ACRES GOOD GRASS AREA = 1.86 ACRES Tc-8•MINUTES 13 R1 of "B"SOILS - 0.61 ACRES TOTAL AREA-0.08 ACRES WOODED AREA=0.14 ACRES - GRASS:002 ACRES E 1 1j s GOOD GRASS AREA =0.47 ACRES "C"SOILS = 1.45 ACRES ACRES CB#3 IMPERVIOUS 0.06 ACRES D _ GOO EGRASS AREA22 A 1.23 ACRES Tc-8 RIMES .73 •' -- - pp M PROPOSED WATERSHED 1 x, \ / / / -•' _ TOTAL AREA-0.35 ACRES di 6 F63Ss # TO EUJNGTON ROAD //' GRASS:0.17 ACRES CB#4 IMPERVIOUS 0.18 ACRES p O ' TOTAL AREA -0.17 ACRES C-0.58 O 0 O Tc.8 MINUTES Z IMPERVIOUS AREA-0.04 ACRES "A"SOILS =0.13 ACRES '�; �;- / _ - TOTAL AREA-0.39 ACRES GOOD GRASS AREA 0.13 ACRES _ CB 2:"- -.� ,\ - CRASS HSC A:0.18 ACRES v Z v s.ao CB15 IMPERVIOUS:0.21 ACRES i J V - -•.. / m Z // -/' +... � •, Tc-8 MINUTES UU .,.. .. ,-<:. aso - „- > _ _ •• •,.- � -. 1 / � ..�y\�// -- �� TOTAL AREA-0.18 ACRES a �P=m {{ -.1 �/ ,: - - .-; -•CB 1 C9-3 p CB-9 .` '�. ,;C. � / .,,.,;. I:-5=., j - GRASS HSG A:0.08 ACRES ^F- - -PROPOSED WATERSHED \\ CB#6 IMPERVIOUS:0.10 ACRES POSED WATERSHED 2s p / / - BOUNDARY LINE BOUND�PICAL) / >II 's �? / / (TYPICAL) I Y LINE Tc-8 MINUTES s n I TOTAL AREA-0.47 ACRES d CRASS HSC A 020 ACRE E S >Q CB#7 IMPERVIOUS:•0.27 ACRESS F- o CB-4 ss• - nso To-8 MINUTES OTAL AREA 0.30 ACRES _`:r --. ....- . ..__._-emu. CB-5- •>� ss T.W._ a as L>� \.\ TCRASS HSG A:010 ACRES ; r zas 80 0 CB#8 IMPERVIOUS:0.20 ACRES 's C-0.68 F. Tc.8 MINUTES Q V s / TOTAL AREA-3.00 ACRES GRASS.2.02 ACRES CB#9 WOODS:064 ACRES N s ss. ,��' i; " p t" _' ,s>�' "-A. � � _ \�� /� - - _ IMPERVIOUS:0.34 ACRES � F Z e T 10 MINUTES O S O Tv Z7 o- �. �, CB-14 'O °ao _ aYOp - •� � \\ �\ ` TOTAL AREA-1.37 ACRES J S a=\��'- \` - - GRASS:0.83 ACRES C R N j t7f I -- 3 WOODS:OA1 ACRES Q O CB#10 IMPERVIOUS:0.13 ACRES / PROPOSED CATCHMENT C-035 PROPO G LINE BOUNDARY 80 : � �` Tc-10 MINUTES N / \ TOTAL AREA-280 ACRES ' / (TYPICAL) - s. PROPOSED WATERSHED#3 \ CRASS:163 ACRES BY-PASS WATERSHED CB#11 \ » a .� WOODS:0.92 ACRES - \ - t7i TOTAL AREA = 5.63 ACRES \ IMPERVIOUS:0.26 ACRES IA TOTAL 10 MINUTES IMPERVIOUS AREA=0.48 ACRES "A"SOILS=0.86 ACRES - AL AREA-0.48 ACRE _ . -''� ';' - � _ �` n.w' G.F. 7>eso• ,- - '. ( GRASS:0.44 ACRES WOODED AREA-0.13 ACRES GOOD GRASS AREA =0.73 ACRES - WOODS:0.01 ACRES B"SOILS - 3.63 ACRES - CB#12 IMPERVIOUS:0.03 ACRES WOODED AREA= 1.33 ACRES C.028 _ _ _ Tc-10 MINUTES - N... GOOD GRASS AREA 2 30 ACRES > /- "C"SOILS =0.66 ACRES r Z TOTAL AREA-0.27 ACRES GOOD GRASS AREA =0.66 ACRES GRASS:0.25 ACRES CB#13 IMPERVIOUS: .02 ACRES C 0 > PROPOSED CATCHMENT - - _ / LU ' BOUNDARY UN E _ - Tc-10 MINUTES (TYPICAL) , TOTAL AREA-0.48 ACRES - CRASS:0.36 ACRES WOODS:0.07 ACRES r .�._ / -.. CB#14 IMPERVIOUS. ACRES ES C. 0,33 y�ys Tc-10 MINUTES TOTAL AREA-0.24 ACRES '.. o EXISTINC WOODS:0.06 ACRES HEADWALL GRASS: 0..18 ACRES d \ - �-- Tc-10 MINUTES / z ' a � r G z C IL S 0zLu_ avzo sxEBr i C-DR2 0 - SHEET 2 OF 2 S fl