Conservation Commission Agenda (linked)

May 22 7024
TOWN OF WATERFORD
Application for Inland Wetland / Watercourse Permi
Planning & Development
Type of Application: Agency Use: Town of Waterford, CT
Permitted Use, Section 4.1 Date Received: 5 aa [aoa 4
Unregulated Activities, Section 4.2 Received By:
Regulated Activities, Section 6 Vv Fee: [Go 00 Application Number: C-24-05
1. Applicant: 1721, LLC Phone: 203-348-8378
Address; 205 Willowbrook Avenue Stamford State, CT Zip: 06385
Fax: E-Mail: august.lenhart@gmail.com
2. Owner: <Same as applicant> Phone:
Address: State: Zip:
Fax: E-Mail:
3. Agent: Indigo Land Design, LLC (Joe Wren, PE) Phone: 860-388-9343
Address: 40 Elm St., 2nd Fl. Old Saybrook State:_CT Zip: 06475
Fax: E-Mail: _jwren@indigo-land.com
4. Property Address: 430 Mohegan Avenue Parkway & 23B Old Norwich Road Tax Map 76 Lots 10164 & 5600
5. Abutting Property Owners — Complete Attached Form <S€€ attached>
6. Activity to be Reviewed and / or Licensed (attach sheet if necessary): <see attached>
7. Description of Proposed Activity (attach sheet if necessary): <S¢ attached>
8. Purpose of Activity (attach sheet if necessary): <see attached>
9a. Acreage of Property: 5.716 ac 9b. Acreage of Wetlands: 0.042 ac. (on-site)
10. Acreage of Wetlands Altered: 0.0 - None
11. Wetland Mitigation Proposed: 0.0 - None
12. Section 7 and sections 8.1 & 8.2 of the Town of Waterford “Inland Wetlands and Watercourse Regulations”
have been complied with: (Review attached check list) Yes: No:
The applicant / owner hereby gives the Commission, its agent and consultants the right of free access to any part of the property under
consideration. The undersigned warrants the truth of all statements contained herein and in all supporting documents according to the best of
his / her knowledge, information and belief.
Applicant: Date: 9-21-24
Owner: _<Same as applicant> Date: 5-21-24
Agent: Cesyet When Date: 5-21-24

TOWN OF WATERFORD
Application for Inland Wetland / Watercourse Permit
1721, LLC
430 Mohegan Avenue Parkway & 23B Old Norwich Road
6. Activity to be Reviewed and / or Licensed (attach sheet if necessary):
The activity to be reviewed includes some clearing and grading in the 100' upland review area
for the construction of two stormwater management basins. A portion of the 100' URA on site
will be retained, the majority of the URA width on site is proposed to be 75 feet, and a small
portion in the northeast corner will be 50 feet but, in no case, is the URA width proposed to be
less than 50 feet.
7. Description of Proposed Activity (attach sheet if necessary):
The applicant is proposing a 24-unit (16 single-family homes and 4 duplex-style homes) 8-30g
affordable housing development on the subject property. All proposed buildings, roadways,
utilities, stormwater basins are proposed beyond the 100' URA. Some clearing and grading is
necessary within the outer fringes of the URA for the construction of the stormwater
management basins. The proposed activity within 100 feet from the wetlands for this project is
limited to clearing and grading and will be revegetated ~ this area of disturbance is
approximately 0.15 acres. There is no proposed work within any wetland area or within 50 feet
of any wetland area.
8. Purpose of Activity (attach sheet if necessary):
As mentioned above, the purpose of the activity is for clearing and grading in the URA for the
construction of the two proposed stormwater management basins. The entire disturbed area
within the URA will be revegetated and no other improvements are proposed within the URA.

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CLAEngineers, Inc.
Civil © Structural © Survey
317 MAIN STREET e NORWICH, CT 06360 © (860) 886-1966 © (860) 886-9165 FAX
April 23, 2024
Joe Wren, PE
Principal
Indigo Land Design, LLC
40 Elm Street, 2nd Floor
Re: 430 Mohegan Avenue Parkway
23B Old Norwich Rd
Waterford CT
CLA —7572
Dear Mr. Wren:
At your request, CLA Engineers delineated inland wetlands on the referenced parcel
according to the State of Connecticut statutory definition as described in C.G.S. Section
22a. CLA conducted fieldwork in February, March and April of 2024 and delineated the
inland wetland boundary with sequentially numbered pink flagging tape. This letter
documents the wetland delineation and the soils encountered on the site.
Site Setting
The site is currently undeveloped except for a sanitary sewer that runs along the northerly
side from Roberts Court to Mohegan Avenue Parkway. The vegetation is in an early stage
of old field succession and dominant vegetation includes multiflora rose (Rosa multiflora)
barberry (Berberis thumbergii) reaspberry (Rubus spp.) Where trees occur, they include
red maple (Acer rubrum) tree of heaven (Ailanthus altissma) hickories (Carya spp.) and
black walnut (Juglans nigra).
The current land use surrounding the site is predominantly residential to the west, north
and east. Connecticut College is located to the south.
The topography of the site features moderate to gentle hillslopes with high elevations of
approximately 168° NAVD on the southwestern side of the site down to elevation
approximately] 18’ in a bowl like depression on the eastern edge of the site. Surface water
flows offsite to east under Mohegan Avenue Parkway via a culvert. The water eventually
flows into Mamacoke Cove. Fill, in the form of boulders, was historically placed along
upland edge of wetland and subsurface flow emanates from boulder fill area.

Soils
Southern New England was overlain by glacial ice as recently as 12,000-15,000 years ago
during the Wisconsin glaciation. The materials that the glaciers deposited over top the
local bedrock determine the surficial geology of the region and of the site. These glacial
deposits are generally divided into three categories: glacial till (un-stratified sand, silt and
rock), glaciofluvial (water sorted, stratified sand and gravel), and glaciolacustrine
(stratified sand, silt and clay that settled out in lakebeds). The original type of glacial
deposit present on the site is glacial till. This finding is based on on-site—observations and
the NRCS mapping (attached) that shows the soil series mapped as (51) Sutton, (61)
Canton and Charlton and (84) Paxton and Montauk.
The soils on the site have been re-graded for the existing site development within the sewer
easement. The slopes down to the wetlands reflect past grading and filling.
Table 1 is a sumary table of the soils found on the site. Appendix A provides additional
soil data
Table 1 - Soil Types and Properties at the 430 Mohegan Avenue Parkway Site
Soil Series Parent Material Drainage Class Texture/Characteristics
3 Ridgebury, Glacial till with Somewhat Poorly | Sandy loam
Leicester, dense layer to very poorly
Whitman* drained
51 Sutton Glacial till Moderately well | Sandy loam
drained
61 Canton and Glacial till Well Drained Sandy loam
Charlton
84 Paxton and Glacial till Well Drained Sandy Loam
Montauk
* Wetland soil types on site, not mapped by NRCS
The Ridgebury, Leicester and Whitman series consists of very deep, somewhat poorly to
poorly drained soils formed in lodgment till derived mainly from granite, gneiss and/or

schist. They are commonly shallow to a densic contact. They are nearly level to gently
sloping soils in depressions in uplands.
The Sutton series consists of very deep, moderately well drained loamy soils formed in
melt-out till. They are nearly level to strongly sloping soils on hills, low ridges, and
ground moraines, typically on footslopes, lower backslopes and in slight depressions.
The Canton and Charlton series consists of very deep, well drained soils formed in a
loamy mantle underlain by sandy till. They are on nearly level to very steep moraines,
hills, and ridges.
The Paxton and Montauk series consists of well drained loamy soils formed in lodgment
till. The soils are very deep to bedrock and moderately deep to a densic contact. They are
nearly level to steep soils on hills, drumlins, till plains, and ground moraines. (Source:
NRCS https://soilseries.sc.egov.usda.gov)
Wetland Description
This site has one wooded wetland system that system that continues to the east. Citation:
(https://fwsprimary.wim.usgs.gov/wetlands/apps/wetlands-mapper/.)
EL Classification code: PFOLE
System Palustrine (P) : The Palustrine System includes all nontidal wetlands dominated
by trees, shrubs, persistent emergents, emergent mosses or lichens, and all such wetlands
that occur in tidal areas where salinity due to ocean-derived salts is below 0.5 ppt. It also
includes wetlands lacking such vegetation, but with all of the following four
characteristics: (1) area less than 8 ha (20 acres); (2) active wave-formed or bedrock
shoreline features lacking; (3) water depth in the deepest part of basin less than 2.5 m
(8.2 ft) at low water; and (4) salinity due to ocean-derived salts less than 0.5 ppt.
Class Forested (FO) : Characterized by woody vegetation that is 6 m tall or taller.
Subclass Broad-Leaved Deciduous (1) : Woody angiosperms (trees or shrubs) with
relatively wide, flat leaves that are shed during the cold or dry season; e.g., black ash
(Fraxinus nigra).
Water Regime Seasonally Flooded/Saturated (E) : Surface water is present for
extended periods (generally for more than a month) during the growing season, but is
absent by the end of the season in most years. When surface water is absent, the substrate
typically remains saturated at or near the surface.
The on-site wetland has predominantly of red maple trees in the canopy. The understory
is a dense tangle of multiflora rose and Japanese barberry. Also present were jewelweed
(Impatiens capensis) and skunk cabbage (Symplocarpus foetidus).

Vernal Pool Investigation
CLA conducted on-site investigations of the wetland on March 15, 2024 and April 8
2024. These dates coincided with site visits to other, known vernal pools in coastal
southeastern Connecticut, which had wood frog and spotted salamander egg masses
present. No wood frog or spotted salamander egg masses were found at the site, nor was
there any other evidence of reproduction of vernal pool species. The maximum depth of
water present in the wetland was six inches. Given this hydrology, it is not surprising that
the wetland does not support vernal pool species.
Potential for Wetland Impacts
CLA understands that the proposed development, as designed by Indigo land Design LLC,
has the following characteristics:
e A 75-foot vegetated buffer will be maintained around the inland wetland.
e The stormwater treatment system is designed to meet the CTDEEP 2004 Manual
as revised to 2024.
e The Erosion and Sedimentation controls have been designed to be consistent with
the CTDEEP 2002 Manual as revised to 2024.
Given that lack of direct wetland impacts and the three factors mentioned above, CLA
believes that the project can be constructed without adverse impacts to inland wetlands.
Please contact me if you have any questions,
Sincerely,
ebutC Kutee
Robert C. Russo CSS

Appendix A
Soils Data

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Soil Map—State of Connecticut, Eastern Part
Roberts Ct
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
51B Sutton fine sandy loam, 0 to 8 44 21.6%
percent slopes, very stony
60B Canton and Charlton fine 0.8 4.1%
sandy loams, 3 to 8 percent
slopes
60D Canton and Charlton soils, 15 AA 5.6%
to 25 percent slopes
61B Canton and Charlton fine 5.4 28.0%
sandy loams, 0 to 8 percent
slopes, very stony
61C Canton and Charlton fine 3.9 20.2%
sandy loams, 8 to 15 percent
slopes, very stony
73E Charlton-Chatfield complex, 15 141 5.6%
to 45 percent slopes, very
rocky
84C Paxton and Montauk fine 2.9 15.0%
sandy loams, 8 to 15 percent
slopes
Totals for Area of Interest 19.2 100.0%
UsDA Natural Resources Web Soil Survey 1/16/2024
<= Conservation Service National Cooperative Soil Survey Page 3 of 3