HomeMy WebLinkAbout18-36P Philip R Smith School IWA FRECEIVED
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TOWN OF SOUTH WINDSOR pSAG YINLAND WETLANDS, WATERCOURSES AND CONSERVA "" I N
Application#,�ff-S(� Date Received �--ao
INSTRUCTIONS
1. Fifteen applications (15) with map and plans (2 copies) shall be submitted together with the fee set forth
in the Inland Wetlands, Watercourses and Conservation Regulations, Town of South Windsor. (See
Regulations, Section VII-X)
2. The South Windsor Inland Wetlands, Watercourses and Conservation Regulations should be reviewed with
respect to the standards and criteria for application Evaluation. (See Regulations, Sections VII-X)
3. The applicant understands that this application is to be considered complete only when all information and
documents required by the Agency have been submitted. The applicant shall also complete the state filing
form.
A. Applicant's Name: South Windsor Public Schools Board of Education
Address: 1737 Main Street, South Windsor, CT 06074
Phone: (home) (work) (860) 291-1205 (email) superintendent@swindsor.kl2.ct.us
B. Legal owner's name: Town of South Windsor
Address 1540 Sullivan Avenue, South Windsor, CT 06074
Phone (home) (work) (860) 644-2511) (email). galligan@southwindsor.org
(List additional owners, addresses, and phone numbers on back of application)
C. If the applicant is not the owner of the subject property; a letter by the owner(s) authorizing the proposed
regulated activity set forth in the application must accompany this form and will be part of the application.
D. Project Name (if any) Philip R. Smith Elementary School
Project Address 949 Avery Street
1. Contact Person(if further information is needed)
Henry Thomas, RLA
The LRC Group, 160 West Street (work) (860) 635-2877 (fax) (860) 635-4266
Cromwell, CT 06014
E. The geographical location of the property which is to be affected by the proposed regulated activities
including a description of the land in sufficient detail to allow identification of the property on the Inland
Wetland and Watercourse Map.
Assessor's map# 93 Parcel# 20 Zone RR
F. Names of all abutting property owners from records in Town Clerk's office. (use separate sheet if
necessary)
See separate sheet.
G. Have you notified all abutting property owners (from records in Town Clerk's office) by certified letter that
an application is pending before the Agency? Mailings are being prepared and will be completed
by June 15th. Proof will be provided to town.
CK ** (you are required to supply a copy of the letter with the list of the names of the abutters)**
H. Purpose and description of all proposed regulated activity(s) including amount of disturbance in square feet
and types of fill and the time element involved:
Removal of existing improvements such as playground areas, walkways and structures.
Repair and improvement of disturbed surfaces.
Construction of new stormwater outlets and related grading (excavation, no net fill).
Removal of existing stormwater outlets and repair/reseeding.
I. A class A-2 map of the property drawn to 1"=40', showing the area to be developed, extent of the wetlands
and watercourses affected, topography, existing and proposed activities and names and locations of adjacent
property owners must be submitted.
J. Amount of regulated area disturbance (within upland review area or regulated buffers)
.5 ac
K. Acreage of wetlands and watercourses in regulated areas to be altered: 0
L. Acreage of wetlands and watercourses to be created: 0
M. Lineal feet of proposed stream alteration: 0
N. Total land area of project and percentage, which is wetlands: 15.1 ac. total; 19.8% wetlands
O. Identify all other permits or approvals that have been issued, applied for, or required with respect to the
proposed activity set forth in this application. (These may include but not be limited to, local Planning &
Zoning, Zoning Board of Appeals, D.E.P., F.E.M.A., D.O.T., The Army Corps of Engineers, and any other
State,Local or Federal Permits.)
Other p Righat will be applied for include:
Town oor Planning and Zoning (Site Plan and Special Permit
State of CT DAS School Grants and Construction
State of CT DEEP General Permit for Construction Activities
8
P. The applicant (or designated representative) hereby attests that a sign will be posted at the following
location(s) Facing the street at the school's entrance drive at Griffin Road.
By The LRC Group Name Henry Thomas, RLA
on or before the following date July 8, 2018 (assuming a July 18, 2018 hearing date.)
Signature:
These signs must be displayed continuously for at least ten (10) days prior to scheduled meeting (see
Regulations, Section 7.3a). The applicant is responsible for maintaining the sign during this period.
The undersigned hereby applies for the regulated activities listed in paragraph H above, for a Inland Wetlands,
Watercourses and Conservation permit for the property described herein and confirms that:
1. She/he is familiar with the currently effective Inland Wetlands, Watercourses and Conservation Regulations
of the Town of South Windsor.
2. She/he understands that at any time during the review period, the Agency may require the applicant to
provide more information about the wetlands and/or watercourses in question and/or any proposed activity.
3. All information submitted in the application for review shall be considered factual, or in the case of
anticipated activity, binding. A knowing failure of the applicant or any of her/his agents to provide correct
information, or performance exceeding the levels of activity anticipated, shall be sufficient grounds for
revocation of any permit under these regulations.
4. By making this application, the applicant gives permission to the Inland Wetlands, Watercourses and
Conservation Commission members and/or its representative to enter the portions of the premises which are
subject of the application for the purpose of inspection and investigation and otherwise evaluating the merits
of the application both before and after a final decision has been issued.
MX4QJX)
Ift mel Galligan, Town Manager
Si nature of Owner of Pro erty
Date June 13, 2018
Craig Zimmerman, Chair, Board of Ed
Signature of Applicant Date June 13, 2018
W\IWACCadmin\Forms\1WACC Application
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Wetlands Assessment Report
Philip R. Smith Elementary School
949 Avery Street
South Windsor, Connecticut
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SUBMITTED TO:
The LRC Group
160 West Street, Suite E
Cromwell, CT 06416
June 2018
28 Arbor Lane martinbrogieinc@gmail.com
Madison, CT 06443 860-208-0360
Phillip R. Smith Elementary School
Wetlands Report
June 12, 2018
1 . Introduction
1.1 Purpose
Martin Brogie, Inc. (MBI) is pleased to submit the following report regarding the Connecticut Regulated
Wetlands identified on and adjacent to the Philip R. Smith Elementary School site located at 949 Avery
Street in South Windsor. Connecticut.
The general scope of services was to conduct an assessment of the existing. previously delineated
Wetlands to assess their specific functions and values and to prepare a report describing the wetland
system attributes. In addition, MBI evaluated the proposed Construction plans and details to assess
potential wetland impacts that may result from construction and/or design implementation. As needed.
MBI provided wetland mitigation recommendations/design alternatives, to offset potential impacts.
1.2 Background
Martin Brogie, Inc. (MBI) was engaged to conduct this assessment by LRC Group of Cromwell,
Connecticut. MBI conducted the wetland evaluation on May 23, 2018 in anticipation of South Windsor
Wetland Commission review of the proposed project.
Martin Brogie, Certified Soil Scientist with MBI conducted the assessment and field inspection aspects
of the project.
Delineated Wetlands including two ponds and a brook are located on the west side of the school
property. The existing school building is proposed to be demolished and a new 45,000+/- square foot
(s.f.)school building and associated amenities will be constructed.
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Phillip R. Smith Elementary School
Wetlands Report
June 12, 2018
2. Site and Vicinity Characteristics
2.1 General Site Description and Location
The Property is approximately 15.33 acres in size and is improved with a 42,000 +/- square foot (s.f.),
one-story, elementary school building. A paved driveway enters the Property from Avery Street, to the
east, and joins paved parking areas northeast and south of the school building as well as a circular drive
adjacent to the southeast of the school. Additional paved driveway and play areas are located adjacent
to the north of the school.
Grassed areas are generally located south east, north and west of the school/parking areas including a
ballfield and a playground to the north and a small play area adjacent to the west side of the school.
The western, approximately, one-third of the Property consists of a mature forest, a man-made pond and
associated wetlands. A walking path, including two bridges, extends from the school and around the
pond, forming a loop trail. An unnamed watercourse feeds the pond from the north and continues
southward off of the Property.
The current school facility includes two storm water point discharges to the east side of the wetlands.
The southern discharge point emanates from a catch basin southwest of the school and terminates as a
12" reinforced concrete pipe with headwall at the edge of the wetland near wetland flag #20. The
discharge area appeared stable and exhibited no evidence of erosion or deposition. The northern
discharge pipe emanates from the northwest corner of the school and terminates at a 12" reinforced pipe
with headwall at the east edge of the wetland near wetland flag #9. The discharge area appeared stable
and exhibited no evidence of erosion or deposition.
The school is located in a residential area with wetlands bordering the site to the north and south.
Single-family residences are located nearby to the northeast, east and southeast. A small wooded area
borders the site to the west yielding to residential development.
A Site Location Map is provided as Figure 1. A Google Earthtm aerial view of the school is provided
below.
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Phillip R. Smith Elementary School
Wetlands Report
June 12, 2018
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Avery
2.2 Site Soils
The Natural Resource Conservation Service WEB Soil Survey indicates that the majority of the site
consists of Udorthents (man-made land) in the area of the school. Surrounding upland soils are Cheshire
Fine Sandy Loam which consists of very deep, well drained loamy soils formed in supraglacial till on
uplands. They are nearly level through very steep soils on till plains and hills. Poorly drained wetland
soils located around the pond consists of Raypole Silt Loam. These soils consist of a silt loam over
coarse-loamy windblown sands on sandy and gravelly glaciofluvial deposits.
Field study of the site is consistent with these mapped soils.
2.3 Site Hydrology
The wetlands, watercourse and pond on the western portion of the property emanate from a wetland
area, including a dammed pond and associated watercourse, approximately 2,000 feet north of the
Property. The watercourse flows southward and crosses the northwestern Property boundary entering
Page 14
Phillip R. Smith Elementary School
Wetlands Report
June 12,2018
the approximate 2-acre pond in the northwest portion of the Property. An earthen dam is located along
the south side of the pond and an outlet with a small concrete weir is located at the east end of the dam.
Beyond the weir the watercourse widens variably from 50 to 100 feet as it extends past the southern
property boundary. It narrows again 400-500 feet south of the site and is culverted or dissipates.
The pond and associated watercourse are perennial and appear to be primarily groundwater fed.
2.4 Site Vegetative Cover Types
The wetland area surrounding the pond is dominated by Red Maple (Acer rubrum) and includes Yellow
Birch (Befitlu alleghuniensis). The wooded uplands west of the pond are cominated by White Pines
(Pinus strobus).
Spicebusli (Linclera ben.:oin) was a noted shrub and Skunk Cabbage (.S3"»11)10('cu7)rr.s.1i)etichts-). Sensitive
fern (Onoclea sensibllls), Jack in the Pulpit (Ariscie a IrijAyllum), Jewelweed (linIniliens c(II)ensis),
and varioLls Sedges ((are\sl)p.) were noted In the herbaceous strattim.
Invaslves includitig Poison Ivy and Bittersweet were observed along the east side of the pond.
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Phillip R. Smith Elementary School
Wetlands Report
June 12,2018
3. Wildlife Habitat and Utilization
The onsite pond provides suitable habitat for waterfowl. A family of Canada Geese (Branto
Canadensis) were noted in addition to a pair of Mallards (Ainas plalyrhynchos). Evidence of White-
Tailed Deer(Oelocoileus ill inianres) iluluding trails and tracks ��ere observed. A 13ullfrog (Lithobales
calesheianus) was heard calling from the edge of the pond. It is possible that the pond could be suitable
for fish populations and could likely contain other amphibians and reptiles.
No connection to fish migration routes from the Connecticut River are available.
No obligate Vernal Pool breeding amphibian egg masses were observed in site wetlands during the site
visit. These species could possible occur in fringe areas of the pond and associated wetlands.
The dense plant community along the wetlands, stream and pond provide cover, nesting sites and food
opportunities for wildlife and the open water provides habitat for waterfowl.
The Connecticut Department of Energy and Environmental Protection (CTDEEP) Natural Diversity
Database (December 2017) does not depict any mapped State or Federal Listed Species or Significant
Natural Communities on or adjacent to the Property.
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Phillip R.Smith Elementary School
Wetlands Report
June 12,2018
4. Wetland Functions and Values
A qualitative review of the functions and values of the on-site wetlands was performed to assist in
determining wetland impacts resulting from the project. Wetland functions consistent with U.S. Army
Corps of Engineers methodology were assessed and are summarized below.
Groundwater Recharge/Discharge — This function considers the potential for a wetland to serve as a
groundwater recharge and/or discharge area. Recharge should relate to the potential for the wetland to
contribute water to an aquifer. Discharge should relate to the potential for the wetland to serve as an area
where groundwater can be discharged to the surface. Given the position in the landscape and the deep,
well-drained soils, the wetland has both discharge and recharge functions.
Floodflow Alteration - (Storage & Desynchronization) - This function considers the effectiveness of
the wetland in reducing flood damage by attenuation of floodwaters for prolonged periods following
precipitation events. Since the wetland directly receives storm water flows it does have some storage
capacity and the ability to attenuate flows. The watercourse and associated vegetated floodplain offer
significant capacity for storage and desycnchronization.
Perhaps the primary function of this wetland system is to attenuate stormflows through storage,
absorption, plant uptake, and dispersion.
Sedimentation/Shoreline Stabilization — This function relates to the effectiveness of a wetland to
stabilize streambanks and shorelines against erosion. The onsite wetland (stream and pond) provide a
stable/well-vegetated environment and the shallow grade further reduces the likelihood of significant
erosion.
Sediment/Toxicant Retention and Nutrient Removat/Retention/Transformation — The wetland
receives stormwater input from a variety of locations. Stormwater flow, through this system does
reduce entrained sediments which are deposited in eddies and slower moving water areas. Overall, the
system is highly suitable for retention and removal, although it does not appear to receive significant
quantities of stormwater
Production Export—This function relates to the effectiveness of the wetland to produce food or usable
products for humans or other living organisms. Given the variety and type of vegetation in the wetland
and pond, the wetland does produce food for wildlife use. The pond/stream also provides habitat for
insect and macroinvertebrates that serve as food sources for larger prey.
Fish and Shellfish Habitat — This function considers the effectiveness of seasonal or permanent
waterbodies associated with the wetland in question for fish and shellfish habitat. No fish were noted in
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Phillip R.Smith Elementary School
Wetlands Report
June 12, 2018
the wetland and no assessment of fish passage impediments was conducted throughout the reach on, or
offsite. It is likely that some small populations of Brook Trout and/or Dace are present in the pond or
stream. Some larger fish are possibly present in the pond if it is stocked. No connection to fish
migration routes from the Connecticut River are available.
Wildlife Habitat - This function considers the effectiveness of the wetland to provide habitat for
various types and populations of animals typically associated with wetlands and the wetland edge. Both
resident and/or migrating species are considered. See Section 3.
Endangered Species Habitat— The Connecticut Department of Energy and Environmental Protection
(CTDEEP) Natural Diversity Database (December 2017) does not depict any mapped State or Federal
Listed Species or Significant Natural Communities on or adjacent to the Property.
Visual Quality/Aesthetics — The pond, vegetation, path, bridges, waterfowl and the associated wetland
areas provide strong visual qualities. As such, it has high value with regard to this category.
Educational/Scientific Value, Recreation, and Uniqueness Heritage — The above comments apply.
In addition, a walking path and bridges are located along and over the stream. The presence of this area
at a school provides significant educational value.
Overall, the wetland system provides several strong functions and values including stormwater
attenuation, wildlife habitat, and aesthetic and educational values.
Page18
Phillip R.Smith Elementary School
Wetlands Report
June 12, 2018
5. Proposed Project Improvements
The existing 42,750 square foot school building is being demolished and a 45,710 square foot school
building is being constructed in its place. The new building will be oriented parallel with Avery Street.
New parking has been provided to accommodate the daily demand as well as parking for special events.
Improvements associated with the construction of the new school building will include adding a second
vehicle and pedestrian access from Avery Street, additional parking areas, driveways and sidewalks, and
drainage structures and associated materials. The new construction will also include porous pavement
areas and underground detention and infiltration chambers. The project increases the total impervious
surface over the property. The increase in impervious area and site development will cause an increase
in the peak rate of runoff leaving the site. Therefore, on-site stormwater detention will is required, as
well as water quality renovation.
The parking area on the south side of the school will be constructed with permeable pavement as well as
underground detention. Infiltration chambers will also be utilized to discharge stormwater, including
roof drainage, to the subsurface. Two, flared end, rip-rap protected stormwater outfalls are proposed
west of the southern parking area with discharge to the west and southwest, within the regulated area.
The northern pipe will discharge toward the pond and the southern pipe discharges south of the weir
(pond outlet). Minor grading associated with the south pipe with be approximately 12 feet from the
wetland boundary. Some minor grading with also occur northwest of the school, in the regulated area,
to accommodate a walkway connection to an existing walking path.
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Phillip R. Smith Elementary School
Wetlands Report
June 12, 2018
6. Impacts, Mitigation and Recommendations
The proposed project is a more intensive use of the site and requires more stormwater management and
discharge locations over existing conditions. Some construction activity will take place in the regulated
area, but there will be no direct wetland impacts other than the removal of the two existing discharge
points. Stormwater discharge design is such that treatment and attenuation will be achieved in
accordance with regulatory requirements and discharges to the wetlands will consist of sheet flow over
vegetated surfaces before reaching the pond and associated stream.
Overall, the constructed project is not expected to have any adverse impacts on existing wetland quality
or functions and values, especially since all proposed activity is within already developed areas of the
site, outside the naturally vegetated and fenced perimeter of the wetlands. Construction phasing, erosion
control implementation, maintenance and inspections, as proposed, will avoid construction related
impacts.
The two existing stormwater discharge pipes must be removed and decommissioned. They are located
along the wetland limits and must be removed or abandoned with care. Erosion control consisting of hay
bales and silt fence should be installed prior to removal. Both outfalls have concrete headwalls and
some rip rap outlet protection. The headwalls should be removed in a way that minimizes adjacent soil
disturbance and the voids should be carefully backfilled immediately with bank run sand and gravel and
topped with 8 to 10 inches of high organic content topsoil and seeded with a wetland seed mix. New
England Wetmix (or similar). The small swales between the headwall locations and the open water can
be left as is after the hand removal of the rip rap.
Sincerely,
rA A//-
Martin Brogie, LEP
Soil Scientist
President
w/attachments
Page110
Phillip R.Smith Elementary School
Wetlands Report
June 12, 2018
7. References
DeGraaf, Richard M. and Yamasaki, Mariko. 2001. New England Wildlife Habitat, Natural History, and
Distribution. University Press of England
Martin, et. al., 1951. American Wildlife and Plants — A Guide to Wildlife Food Habits. Dover Books,
General Publishing Co., Ltd., 1951
U.S. Army Corps of Engineers,The Highway Methodology Workbook Supplement,November, 1995
Page111
Phillip R. Smith Elementary School
Wetlands Report
June 12, 2018
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Phillip R. Smith Elementary School
Wetlands Report
June 12, 2018
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R Smith Elementary School
j Engineering Summary Report
Table of Contents
Ta is Pa e
Introduction 2
Existing Site Conditions 2-3
Proposed Improvements 3
Site Drainage Design 34
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Method of Analysis 4
Runoff Summary 4-5
Conclusions 6
Appendix A—Storm.System Design Details
1) Soils Maps
2) TSS Calculation Summary
3) Outlet Protection Design 1
4) Water Quality Volume Calculations
Appendix B— Post Construction Inspection&Maintenance
Appendix C—Pre& Post Developed Hydrologic Data
1) 2, 10, 25, and 100-Year Stone Runoff Data
2) Pre and Post Developed Drainage Area Maps
Appendix D—Flood insurance Rate Map
Appendix E Perm6.abti ty F-esults
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Proposed Phi/ip R > �le �rycfioo/
Engineering ' f
5 .
Introduction - z
This summary'rept r fias Soen'prepared to,review the site engineering and stormwater drainage
design for the°P+b""Jsed�Ptiilip R Smith Elementary School located on the west side of Avery
Street. The Engineering Summary Report was prepared in accordance with the Town of South
Windsor Regulatioiis � -
Existing Site Conditions
A school building containing approximately 42,750 square feet with associated parking areas,
loading, play areas and sports fields exists on the property. The school is bordered to the west
by Dart Brook and north and south by residential properties.
The property has one access point. The access from Avery Street includes a bituminous
concrete driveway along with a bituminous sidewalk.
This parcel contains approximately 15.12 acres and is located in the Rural Residential District.
The surrounding properties to the north are located in the Designed Residence District. The
surrounding properties to the west are located in the AA-30 L.imhed?Residential District. And the A
surrounding properties to the south are located in the Rural Residential District.
The south western portion of the property consists of woods, the Dart Brook, field delineated
inland wetlands and steep slopes. The northern portion of the property consists of sports fields
and a play area. The eastern portion of the property consist of parking areas, bituminous
concrete sidewalks, and lawn area. A bituminous concrete parking area consisting of 45 parking
spaces exists adjacent to the east of the entrance to the school building and 17 parking spaces
located south of the entrance to the building.
There currently exists no drainage materials associated with the parking areas, but there is one
yard drain located south of the building that discharges into Dark Brook. There is existing storm
drainage that run along Avery Street.
The existing soil types that cover the property are depicted on the sail maps referenced in
Appendix E.
The surface runoff from the property was analyzed at three_ locations referred to as Analysis
'- Points.
f: Analysis Point #1 is located at the intersection of the southern property line and where Dart
Brook crosses over.
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' Analysis Point#2 is located at the existing catch basin that is located in the south eastern corner
of the property that discharges in Avery Street
d ''at khe northeastern corner of the property where' water will
Analysis Point #3 is locate
discharge off the site into Averytrt'
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June 5, 2018
Proposed Philip RF "�'mithr, err� Gh'oo/
Engineering Summary Ra ; >
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Deep test ho10: teens where conducted throughout the property to examine existing soil
conditions, identi�r !=ram iiivk ye soil:layers and grab samples for permeability test. Sail samples for
permeability to w gabbed at the bottom of the excavated deep test hole. The test hole
data is provided on the construction detail sheets. See Appendix F for Permeability results
Proposed Improvements
The existing 42,750Lsquare foot school building is being demolished and a 45,710 square foot
school building is being constructed in its place. The new building will be orientated parallel with
Avery Street. New parking has been provided to accommodate not only the daily demand from
faculty and visitors, but also to allow appropriate parking for special events.
Improvements associated with the construction of the new school building will include adding a
second vehicle and pedestrian access from Avery Street, adding additional parking areas,
driveways and sidewalks, and also adding drainage structures and materials to support the new 4
development. The new construction will also include porous pavement areas and underground j I�
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detention chambers.
The project increases the total impervious surface over the entire property. The increase in
impervious area and site development will cause an increase in the peak rate of runoff leaving
the site. Therefore, on-site stormwater detention will be required, as well as water quality, per
CT DEEP requirements, in the form of at least 80% of the Total Suspended Solids (TSS). ` r
F
Site Drainage Design
The proposed development of the site consists of the construction of new parking areas and
driveways which will be caught in new catch basins, or infiltrate through the proposed porous
pavement areas that will be located in the parking stall areas. The new catch basins will flow
into proposed underground detention that is designed to detain the 100 year storm event.without
overtopping the structures. The sizing of the chambers is also intended to hold the water quality
volume that will be entering the system. See calculations located in Appendix A.
Because the proposed development includes approximately an 9% increase in impervious area,
the installation of the underground detention chambers will be installed to lower the overall
stormwater runoff from the site. Also to accommodate the increase in impervious area, porous
pavement area will be installed as a method of water quality practice. These porous pavement
area will consist of a 2 foot section of 30% void under the finished grade of the parking stall
areas. These areas were sized to hold the 100 year storm event and in the case that there is
excess water, a 4" PVC underdrain pipe is to be installed at the bottom of the pavement section.
The underground detention,system hav s. e been designed assuming that there is no infiltration
occurring through the unit or the stoni. bedding under the unit. However, infiltration is assumed
in the areas of the proposed p6rous pave-ment areas. This infiltration rate has been assumed ,
based on test pits completed by Sdil ciert�e and Environmental Services, Inc. The rate used
was an average of the surroundings1pi i0itton percolation rates.
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Page 3 . .
June 5, 2018
Proposed Philip R. Smith EJe> t �J.
:S f
Engineering Summary Rsparft '.; .r
manageme
The proposed st nt system has been designed in consideration to the need
om�v�ra t erf
to 1) meet all applioabl � +��gn criteria set forth within the Town of South Windsor regulations;
2) meet any additional`d �i !£requirement set forth by the Town Engineer and or the CT DEEP.
Per Town of South Vtlin Regulations,
there is to be zero net increase of stormwater
discharge for the 2, 10 25 and 100-year storm.
Method of Analysis
The HydroCAD Stormwater Modeling System computer program by Applied Microcomputer
Systems was used to analyze and design the storm sewer system. HydroCAD uses the TR-55 g
curve number method to estimate the quantity and peak rates of runoff produced by each
subcatchment; the resulting flows are routed through the different storm system elements to the
- s stem's Outlet Points, typically where the stormwater flows leave the subject property. Storm
y e lfi, 24-hour rainfall values and curve number/cover types as
events were analyzed with Type
selected from the SCS " R-55 Manual. Also, the minimum of Time of Concentration used.was
0.083 hours (5 Minutes) as selected from the SCS TR-55 Manual. Runoff rates chosen from the ,
1r
NOAA Atlas 14, Volume 10, Version 2 located in Windsor, CT are listed below:
. Design Rainfall Amounts:
2 year 3.14 in.
5 year 4.13 in.
10 year 4.96 in.
25 year 6.09 in. ;
f` I
50 year 6.69 in.
^r 100 year 7.84 in.
kc Detailed Runoff Summary
=, Flow Rate Attenuation
Anal sis Point#1
Storm: Pre cfs) Post cfs Change cfs +`
r . t
2 ear 10.62 9.55 -1.07
5 ear 15.64 14.36 -1.28
tg 10 ear 19.88 18.48 -1.40
25 year 25.67 24.12
50 year 30.12 28.47 -1.65 `i
100 year , I 34 fiQ
;r
t '
�� MV
« c `{ June.5, 201&
Proposed'Phffi i Rs iith 9T 1 ntary sa idnf
AS
Engineering,�u[rrary' fep�t
Analysis Point#2
SoXrrf:: Pre cfs) Post (cfs) Change cfs
2 fair 3.05 2.78 .0.27
5 '.ear. 4.39 4.13 -0.26
1-0-year 5.51 5.24 -0.27
25' ear 7.04 6.73 -0.37
60� ear 8.21 7.87 -0.34
100 year 9.39 9.02 -0.37
Analysis Point#3
Storm: Pre (cfs) Post cfs Change cfs
2 year 7.15 6.63 .0.62
5 year 10.52 9.89 -0.63
10 year 13.37 12.65 -0.72
25 year 17.26 16.42 .0.84
50 year 20.24 19.32 -0.92
100 year 23.25 22.25 -1.00
Values listed above are in cubic feet per second.
Conclusions
This summary report demonstrates that all design criteria set forth by the State of Connecticut
and Town of South Windsor have been met or exceeded, and all design and mitigation
measures have been derived from standard practices and procedures as directed by the
Connecticut DEEP and DOT design manuals. In conclusion, the proposed project will satisfy all
design requirements as have been stipulated by the Town, State and Federal regulations that
may apply.
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Town op s--otdA `V
wCd 1540 SULLIVAN AVENUE • SOUTH WINDSOR, CT 06074
SOR.co TELEPHONE(860) 644-2511
Date: July 3, 2018
To: The LRC Group Inc.
160 West St.
Cromwell,CT 06014
From: Jeffrey H. Folger
Environmental Planner
Town of South Windsor
Re: Appl. # 18-36P Review of Phillip R Smith School- Plans dated 6/13/2018.
I have reviewed the site plans for the proposed Phillip R Smith School with the following initial
comments:
1. Please install temporary sediment traps at the downslope corners of the access drives to contain
and filter runoff prior to discharge into the Town drainage system in Avery Rd.
2. Please install silt fence check dams along the slopes of the access drives upon completion of
grading. Seed and mulch immediately.
3. Please extend silt fence along the fill slope along the southern property boundary.
4. Please move the eastern soil stockpile out of the Upland Review Area (URA).
5. Please upgrade the proposed silt fencing along the pond to include a double row of silt fence
filled with wood chips in the center to provide extra filtration of fine particulates
Town Engineer,Town Planner, IWA/CC, Public Building Committee
June 13, 2018
Name
Address
Address
Re: Philip R. Smith Elementary School
949 Griffin Road, South Windsor, CT
CERTIFIED MAIL
Dear [name],
The LRC Group is acting as applicant on behalf of the South Windsor Public School District in regards
to site development plans for a new Philip R. Smith Elementary School which will occupy the current
school site. In accordance with Section 7.3b of the "Town of South Windsor Inland Wetlands,
Watercourses, and Conservation Regulations", you are hereby notified that an application has been filed
on the property abutting yours and is subject to a hearing by the Inland Wetlands Agency/Conservation
Commission. The application and plans are on file with the South Windsor Planning Department.
As an abutting property owner you are invited to the hearing to ask questions and/or give comments.
You may also submit written comments regarding the application prior to the hearing if you so desire.
For further information regarding the specific date this application will be heard please contact Jeff
Folger, Environmental Planner/Conservation Officer, Planning Department,860-644-251 I,ext. 329.
Sincerely,
The LRC Group
Henry Thomas, RLA
Principal
Cc: Kate Carter, South Windsor Public Schools
Charles Warrington, Colliers International
zAlandresourceconsultants12017 jobs117-2145 mpn sw philip r smithldocslpermittingltownldraft applicationslprs abutters notice
06-13-18.docx
LRC Engineering&Surveying,DPC 160 West Street,Suite E
LRC Engineering and Surveying,LLC Connecticut SSE Certified Cromwell,CT 06416
LRC Environmental Services,Inc. Tel: (860)635-2877
Land Resource Consultants,Inc. Fax: (860)635-4226
Offices in Connecticut,New York&New Jersey
www.ireconsult.com
Land Planning • Civil Engineering 4 Environmental Services • Land Surveying 0 Landscape Architecture ___
Abutters to Philip R.Smith Elementary School,949 Avery Street
Inland Wetlands,Watercourses and Conversation Application
South Windsor,CT
As of June 12,2018
Parcel ID Site Address Owner Name Mailing Address Mailing City MailingState Mailing Zip
41900065 65 HITCHCOCK WAY SOUTH WINDSOR TOWN OF 1540 Sullivan Avenue SOUTH WINDSOR CT 06074-0000
50100181 181 KENT LANE ROBBINS CHRISTOPHER A&LISA A 181 KENT LA SOUTH WINDSOR CT 06074-0278-0000
S0100177 177 KENT LANE GEORGE JUSTIN B&ALISON K 177 KENT LA SOUTH WINDSOR CT 06074-0000
0630R051 R051AVERYSTREET SOUTH WINDSOR TOWN OF 1540 SULLIVAN AVE SOUTH WINDSOR CT 06074-0000
44700071 71 HOMESTEAD DRIVE BESER DAVID JR 71 HOMESTEAD DRIVE SOUTH WINDSOR CT 06074-0000
6300970 970 AVERY STREET CARLSON KENT A&ALICE J 970 AVERY STREET SOUTH WINDSOR CT 06074-0000
6300990 990 AVERY STREET SOUTH WINDSOR TOWN OF 1540 SULLIVAN AVE SOUTH WINDSOR CT 06074-0000
44700061 61 HOMESTEAD DRIVE RICKER KEVIN&JUDY 61 HOMESTEAD DRIVE SOUTH WINDSOR CT 06074-0000
44700083 83 HOMESTEAD DRIVE DUNN NANCYT 83 HOMESTEAD DRIVE SOUTH WINDSOR CT 06074-0000
6300935 935 AVERY STREET EIZENKREIN DZMITRY&ALENA 401TALCOTTVILLERD APT 43 VERNON ROCKVILLE CT 06066-0000
50100169 169 KENT LANE MASTRIANO HENRY N&JANEY B 169 KENT LANE SOUTH WINDSOR CT 06074-0000
6300925 925 AVERY STREET FLYNN CHRISTOPHER J&ERIKA J 925 AVERY STREET SOUTH WINDSOR CT 06074-0000
6300911 911 AVERY STREET VIOLETTE MARY L 911 AVERY STREET SOUTH WINDSOR CT 06074-0000
501OR008 R008 KENT LANE SOUTH WINDSOR TOWN OF 1540 Sullivan Avenue SOUTH WINDSOR CT 06074-0000
6300949 949 AVERY STREET SOUTH WINDSOR TOWN OF 1540 Sullivan Avenue SOUTH WINDSOR CT 06074-0000
31500255 255 FAIRVIEW DRIVE SOUTH WINDSOR TOWN OF 23 0255 FAIRVIEW DRIVE SOUTH WINDSOR CT 06074-0000
41900000 PUD 4190 CURRENT RESIDENT Ralph J.Alexander,Esquire SOUTH WINDSOR CT 06074-0000
Law Offices
Willard&Alexander,LLC
225 Oakland Road,Suite 306
81750007 7 SEDGEWICK CIRCLE CROSS PATRICIA G 7 SEDGEWICK CIRCLE SOUTH WINDSOR CT 06074-0000
8175001010SEDGEWICKCIRCLE SNYDER WILLIAM J JR 10 SEDGWICK CIRCLE SOUTH WINDSOR CT 06074-0000
21750008 8 SEDGEWICK CIRCLE GAWLINSKI EDWARD M&DIANE H 8SEDGEWICK CIRCLE SOUTH WINDSOR CT 06074-0000
41900015 15 HITCHCOCK WAY FANDACONE NICHOLAS P III& 15 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
41900021 21 HITCHCOCK WAY SILVERMAN GARY D&DANA K 21 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
41900027 27 HITCHCOCK WAY PLACZEK GARY&LESLIE B 27 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
81750001 1 SEDGEWICK CIRCLE JOHNSON DARLENE R&LAWRENCE A 1 SEDGEWICK CIR SOUTH WINDSOR CT 06074-0000
81750005 5 SEDGEWICK CIRCLE ROSENBERG JOSEF B&PRISCILLA M 5 SEDGWICK CIR SOUTH WINDSOR CT 06074-0000
81750006 6 SEDGEWICK CIRCLE MOHAN GOWTHAMAN& 6 SEDGEWICK CIRCLE SOUTH WINDSOR CT 06074-0000
81750002 2 SEDGEWICK CIRCLE FRIDKIN YEVGENIY 2 SEDGEWICK CIRCLE SOUTH WINDSOR CT 06074-0000
41900043 43 HITCHCOCK WAY HANNA HOSAM Y 43 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
41900045 45 HITCHCOCK WAY TORAM KALYAN& 45 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
41900047 47 HITCHCOCK WAY MACHADO SAMANTHA L& 47 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
41900048 48 HITCHCOCK WAY AHUJA SAMEER& 48 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
41900046 46 HITCHCOCK WAY HANNA TAMER&ELASSAL MAGY 43 HITCHCOCK WAY SOUTH WINDSOR CT 06074-0000
41900044 44 HITCHCOCK WAY CHADHA RAHUL&SAPNA 44 HITCHCOCK WAY South Windsor CT 06074-0000
18250001 1 CHAPMAN CIRCLE HARRISON VARRON D 1 CHAPMAN CIRCLE SOUTH WINDSOR CT 06074-0000
18250003 3 CHAPMAN CIRCLE BROCHU LAURI A 3 CHAPMAN CIRCLE SOUTH WINDSOR CT 06074-0000
18250005 5 CHAPMAN CIRCLE ELIA ROBIN L 5 CHAPMAN CIRCLE SOUTH WINDSOR CT 06074-0000
18250006 6 CHAPMAN CIRCLE KOMARENKO LAWRENCE P&SUSAN C 6 CHAPMAN CIR SOUTH WINDSOR CT 06074-0000
18250004 4 CHAPMAN CIRCLE MAWHINNEY MONICA 4 CHAPMAN CIRCLE SOUTH WINDSOR CT 06074-0000
18250002 2 CHAPMAN CIRCLE EARLE SUSAN M 2 CHAPMAN CIR SOUTH WINDSOR CT 06074-0000
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Connecticut Department of
GISCODE#: � _ _ _ _ _ _
ENERGY & For DEEP Use Only
Ink,ENVIRONMENTAL
PROTECTION
79 Elm Street• Hartford,CT 06106-5127 www.ct.gov/deep Affirmative Action/Equal Opportunity Employer
Statewide Inland Wetlands & Watercourses Activity Reporting Form
Please complete and mail this form in accordance with the instructions on pages 2 and 3 to:
DEEP Land&Water Resources Division, Inland Wetlands Management Program, 79 Elm Street, 3rd Floor, Hartford, CT 06106
Incomplete or incomprehensible forms will be mailed back to the inland wetlands agency.
PART I: Must Be Completed By The Inland Wetlands Agency
1. DATE ACTION WAS TAKEN: year: month:
2. ACTION TAKEN (see instructions,only use one code):
3. WAS A PUBLIC HEARING HELD(check one)? yes ❑ no ❑
4. NAME OF AGENCY OFFICIAL VERIFYING AND COMPLETING THIS FORM:
(print name) (signature)
PART II: To Be Completed By The Inland Wetlands Agency Or The Applicant
5• TOWN IN WHICH THE ACTION IS OCCURRING(print name): VOU'lff I0rW'
does this project cross municipal boundaries(check one)? yes ❑ no
if yes, list the other town(s)in which the action is occurring(print name(s)): p
6. LOCATION(see instructions for information): USGS quad name: /� � or number: �TJ
subregional drainage basin number:
7. NAME OF APPLICANT,VIOLATOR OR PETITIONER(print name): WAM9 MAIO W&M-Is
8. NAME&ADDRESS I LOCATION OF PROJECT SITE(print information):
briefly describe the action/project/activity(check and print information): temporary❑: permanent d description:'
Zl01rd VM CUM/9WA9A6ndr
9.. ACTIVITY PURPOSE CODE(see instructions,only use one code):
10. ACTIVITY TYPE CODE(S)(see instructions for codes): !IZ-
11. WETLAND/WATERCOURSE AREA ALTERED(must provide acres or linear feet): .
wetlands: 0 acres open water body: acres stream: linear feet _
12. UPLAND AREA ALTERED(must provide acres): . acres
13. AREA OF WETLANDS/WATERCOURSES RESTORED, ENHANCED OR CREATED(must provide acres): acres
DATE RECEIVED: PART III: To Be Completed By The DEEP DATE RETURNED TO DEEP:
FORM COMPLETED: YES NO FORM CORRECTED I COMPLETED: YES NO
rev.1212018 pdf
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LRCMANCHESTER QUADRANGLE MAP
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ELEMENTARY SCHOOL D.
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Landscape Architecture SOUTH O'
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1540 SULLIVAN AVENUE• SOUTH WINDSOR, CT 06074
rh°SQR-Co TELEPHONE(860) 644-2511
HAND DELIVERED
September 11, 2018
Matthew Galligan
Town of South Windsor
1540 Sullivan Avenue
South Windsor, Ct 06074
RE: Appl. #18-36P—Philip R. Smith School
Dear Mr. Galligan:
On September 5,2018, the Inland Wetlands Agency/Conservation Commission approved Appl.#18-36P
—Town of South Windsor, Philip R. Smith School—949 Avery St—IWA/Conservation Commission
application for construction of an educational institution building, parking, stormwater management
system, and associated utilities. The site is located easterly of Avery St. Rural Residential (RR)zone,
with following conditions:
1. The final approved copy of the entire set of plans and this letter reproduced thereon must be
submitted to the Planning Department. This must be completed within 65 days of approval prior to
any construction activity on the site. Plans submitted to Planning & Zoning Commission shall be
considered having met this requirement.
2. The applicant shall indemnify and hold harmless the Town of South Windsor against any liability,
which might result from the proposed operation or use.
3. The permit is valid for five years and shall expire on September 5, 2023. It is the
landowner(s)/applicant(s) responsibility to track expiration dates and notify the Commission of a
renewal request at least 65 days prior to expiration.
4. Bonds shall be collected from the contractor in the amount of $20,000 for erosion and sediment
controls and $25,000 for the stormwater system.
5. All approvals required must be obtained and submitted prior to any activity on the site.
6. A contact person shall be identified on the plans.
Very truly yours,
INLAND WETLANDS AGENCY/
CONSERVATION COMMISSION
/
Barbara Kelly, Chairperson
cc: Director of Planning
Chief Building Official
Town Engineer
Henry Thomas, LRC Group -Certified
160 West Street
Cromwell, CT 06014