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STORMWATER MANAGEMENT REPORT 
WATERFORD WOODS APARTMENTS PHASE 2 
384 & 394 WILLETTS AVE. EXT. 
WATERFORD, CT 
PREPARED FOR 
WATERFORD WOODS, LLC 
606 POST ROAD EAST #320 
WESTPORT, CT 06880 
DATE: 
NOVEMBER 18, 2020 
REVISED: 
FEBRUARY 17, 2022 


 
 
 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
 
 
 
 
 
 
TOC 
TABLE OF CONTENTS 
 
PROJECT DESCRIPTION ........................................................................................................................ 1 
EXISTING SITE DESCRIPTION ............................................................................................................. 2 
PEAK FLOW CONTROL & FLOOD PROTECTION ............................................................................. 2 
 
PRE-DEVELOPED CONDITIONS ................................................................................................. 3 
 
POST-DEVELOPED CONDITIONS .............................................................................................. 3 
 
COMPARISON ................................................................................................................................ 3 
 
INFILTRATION & DETENTION ................................................................................................... 4 
STORMWATER QUALITY AND TREATMENT ................................................................................... 5 
 
WATER QUALITY VOLUME & FLOW ....................................................................................... 6 
 
GROUNDWATER RECHARGE VOLUME ................................................................................... 6 
CONCLUSION .......................................................................................................................................... 7 
APPENDICES 
A. DRAINAGE MAPS 
B. HYDROLOGIC COMPUTATIONS (Hydrograph Summary Report) 
C. STORMWATER TREATMENT COMPUTATIONS 
D. SUPPLEMENTAL DATA 
TABLES 
1. PEAK FLOW COMPARISON – EXISTING VS. PROPOSED (NO DETENTION) ................. 3 
2. PEAK FLOW COMPARISON – EXISTING VS. PROPOSED (WITH DETENTION) ............. 5 
3. PROPOSED TREATMENT SUMMARY .................................................................................... 6 


 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
1 
PROJECT DESCRIPTION 
 
Waterford Woods, LLC is constructing a residential multi-family development on two undeveloped 
parcels of land on the south side of Willetts Avenue Extension totaling 26.64 acres.  
• 0.48-acre parcel located at 384 Willetts Avenue Extension identified as Map 140, Lot 9190 
on the Town of Waterford Tax Assessor Mapping 
• 26.16-acre parcel located at 394 Willetts Avenue Extension identified as Map 140, Lot 9192 
on the Town of Waterford Tax Assessor Mapping 
The combined parcels are hereinafter referred to as the Site. 
The Site is in the Commercial Multi-Family District (C-MF). Phase 1 of the multi-family development 
received site plan approval PL-21-1 on March 9, 2021, per Section 16 & 18 of the Zoning Regulations. 
A site plan modification approval PL-21-12 was received on December 14, 2021, for a new Clubhouse 
and associated amenities to be constructed as part of Phase 1. 
An application has been submitted to the Town for site plan modifications associated with Phase 2 of 
the multi-family development. Phase 2 will consist of the construction of three (3) additional apartment 
buildings with a total of 106 units with a mix of 68 one-bedroom and 38 two-bedroom dwelling units. 
Main access will utilize the Phase 1 access driveway approved with the original development with 
minor widening of the exit lane to allow for separate right and left turn movements. Phase 2 site 
modifications will include: 
• Clearing and grubbing. 
• Construction of Buildings D, E and F with an additional 106 residential units. 
• Extension of the 24’ wide main access drives to serve parking facilities adjacent to the new 
buildings. 
• Outdoor recreation areas including community spaces. 
• Additional paved parking spaces adjacent to the new buildings. 
• Reduction of parking space quantity and size sitewide consistent with recently adopted Zoning 
Regulations to minimize impervious surfaces. 
• Concrete pedestrian sidewalks connecting the apartment buildings to the adjacent parking areas 
and amenities. 
• Reduction of pedestrian sidewalk widths sitewide consistent with recently adopted Zoning 
Regulations to minimize impervious surfaces and maintain a residential appearance. 
• Drainage improvements including a stormwater collection network, subsurface infiltration, 
and detention ponds. 
• Extension of private water, sewer, electric, gas and telecom mains. 
• Landscaping including a mixture of street trees, shrubs, foundation plantings and planting beds 
• Building and street lighting. 
• Erosion and sedimentation control measures. 
This stormwater management report has been prepared by a professional engineer and provides a 
comprehensive evaluation of the fully developed Site, including Phase 1 and Phase 2. The report 
concludes that there will be zero net increase in peak flow rates discharging to downgradient wetlands 
or private properties, general drainage patterns will be maintained, and stormwater will be treated in 
accordance with the CT DEEP 2004 Stormwater Quality Manual. 

 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
2 
EXISTING SITE DESCRIPTION  
Construction related to Site Plan Application PL-21-1 has commenced. Construction related to the 
Site Plan Modification PL-21-12 will commence in the spring. As the hydrologic evaluation 
considered pre-development conditions before construction activities, a description of the 
undeveloped Site is provided below. 
The subject Site was undeveloped except for a small outbuilding along Willetts Avenue Extension. 
The Site was generally wooded with an internal network of gravel roads leading to stockpiles of 
construction and demolition debris, such as brick, concrete, timber, etc. There are also signs of 
historical rock quarrying at the southwest corner of the site. 
TOPOGRAPHY – The existing topography generally consisted of gentle to moderately sloping terrain 
from the northeast along Willetts Avenue to the southwest towards two (2) wetland areas on Site and 
Fenger Brook. Existing slopes in the upland areas of the Site ranged from 4% to 7% with steeper 
slopes around the perimeter of the delineated inland wetland areas. 
SOILS – The USDA NRCS Web Soil Survey indicated that the upland area of the Site contain 
Charlton-Chatfield complex, 0 to 15 percent slopes, very rocky (73C) soils, which have a hydrologic 
soil group classification (HSG) of B. Inland wetland areas are designed as Ridgebury, Leicester, and 
Whitman soils, 0 to 8 percent slopes, very rocky, which have an HSG of D. Deep observation test 
holes were performed at the site, which generally confirmed the NRCS soil types within upland areas. 
DRAINAGE – The Site drains from the northeast along Willetts Avenue towards wetland systems to 
the southwest and south. Three (3) existing drainage areas were delineated based upon topography and 
field observation. 
• SITE-EX-01 is 8.182 acres and consists of the northern portion of the site, which drains to a 
wetland area along the westerly property line. 
• SITE-EX-02 is 2.495 acres and consists of the southeastern corner of the site draining to a 
wetland area along the east and southern property line. 
• SITE-EX-03 is 6.764 acres and consists of a peninsula of upland at the southeast corner of the 
site, which drains from a high point at the center to the perimeter wetlands. 
Based upon CT DEEP mapping, the entire Site lies within the Southeast Shoreline subregional 
drainage basin 2000, which is part of the Southeast Coast major basin 2. However, based upon the 
“Jordan Brook Watershed Management Plan Final Report, Town of Waterford, Connecticut”, dated 
February 2000, prepared by Fuss & O’Neill, Inc., the Site is included within the Jordan Brook 
subregional basin 2201 (hereinafter JBWMP). A detailed review of the hydrologic conditions of the 
subregional watershed was not performed as part of this review, however the recommendations of the 
JBWMP were followed as a conservative measure. 
PEAK FLOW CONTROL & FLOOD PROTECTION 
 
Stormwater runoff from the proposed multi-family development will be collected through a series of 
rain gardens, swales, yard drains, catch basins, and drainage piping and discharged to a series of 
treatment, infiltration, and detention areas on the Site.  

 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
3 
Peak flow rates for pre-development and post-development conditions were calculated using SCS TR-
55 methodology. Hydrology Studio 2022 v.3.0.0.21 was used to generate peak flows from the 
watershed with the following parameters: 
PRE-DEVELOPED CONDITIONS (Drainage Area Map DA-01A) 
• DRAINAGE AREAS:  As described above, the Site has three (3) existing drainage areas. 
o SITE-EX-01 is 8.182 acres and consists of the northern portion of the site, which drains to a 
wetland area along the westerly property line. 
o SITE-EX-02 is 2.495 acres and consists of the southeastern corner of the site draining to a 
wetland area along the east and southern property line. 
o SITE-EX-03 is 6.764 acres and consists of a peninsula of upland at the southeast corner of the 
site, which drains from a high point at the center to the perimeter wetlands. 
• RAINFALL: Precipitation frequency and depth estimates (rainfall data) were obtained from 
NOAA Atlas 14, Volume 10, Version 2 at Lat. 41.3376 Long. -72.1197, which corresponds with 
the geographic location of the Site. 
• RUNOFF COEFFICIENT: Composite Curve Numbers (CN) were calculated based on the land 
cover types for the site for HSG B. Land cover types consist of impervious buildings and pavement, 
meadow/brush, open space vegetated areas, woods, and wetlands. Wetland areas were excluded 
from the drainage areas and calculations.  
• TIME OF CONCENTRATION:   Time of concentration (Tc) was estimated for the basin based 
on the SCS method, with sheet and shallow concentrated flow from the hydraulically most distant 
point of the watershed to the discharge point.  
POST-DEVELOPED CONDITIONS (Drainage Area Map DA-02A) 
• DRAINAGE AREA:  For direct comparison with existing conditions, the same three design points 
were evaluated. Drainage area limits were updated to reflect Phase 2 improvements. 
o SITE-PR-01 is 6.702 acres and consists of the north/northwest portion of the developed site. 
o SITE-PR-02 is 3.902 acres and consists of the eastern portion of the developed site. 
o SITE-PR-03 is 6.837 acres consists of a southwestern portion of the developed site. 
• RAINFALL: Same as Pre-Developed Conditions. 
• CURVE NUMBER: Same methodology as Pre-Developed Conditions. Composite Curve 
Numbers (CN) were calculated based on the land cover types for the proposed multi-family 
residential development for HSG B. Land cover types and areas were updated to reflect Phase 2 
improvements, including the reduction of parking space quantities and areas throughout the 
development. 
• TIME OF CONCENTRATION:   Same methodology as Pre-Developed Conditions. 
COMPARISON 
A summary of flows for existing and proposed conditions, without consideration of infiltration or 
detention is provided below with a complete output provided in the enclosed Hydrology Studio Report. 
 

 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
4 
STORM 
EVENT 
AREA 01 
AREA 02 
AREA 03 
TOTAL SITE 
SITE-
EX-01 
SITE-
PR-01 
EX 
SITE-
EX-02 
SITE-
PR-02 
EX 
SITE-
EX-03 
SITE-
PR-03 
EX 
SITE-
EX 
SITE-
PR 
EX 
vs. 
vs. 
vs. 
vs. 
PR 
PR 
PR 
PR 
2-yr 
1.15 
4.63 
3.48 
0.30 
3.20 
2.90 
0.81 
4.54 
3.73 
2.26 
12.26 
10.00 
5-yr 
3.09 
7.68 
4.59 
0.86 
5.18 
4.32 
2.34 
7.79 
5.46 
6.29 
20.47 
14.18 
10-yr 
5.20 
10.41 
5.21 
1.49 
6.95 
5.46 
4.03 
10.75 
6.72 
10.71 
27.86 
17.15 
25-yr 
8.63 
14.45 
5.82 
2.52 
9.53 
7.01 
6.83 
15.14 
8.31 
17.98 
38.74 
20.76 
50-yr 
11.45 
17.52 
6.07 
3.37 
11.49 
8.12 
9.14 
18.51 
9.37 
23.95 
47.08 
23.13 
100-yr 
14.69 
20.89 
6.20 
4.36 
13.64 
9.28 
11.82 
22.24 
10.42 
30.85 
56.24 
25.39 
TABLE 1: PHASE 2 PEAK FLOW COMPARISON - EXISTING VS. PROPOSED (NO DETENTION) 
As shown in the tables above, the proposed multi-family development (SITE-PR) results in an increase 
in peak flow rates as compared to existing conditions (SITE-EX) without consideration of infiltration 
or detention. To attenuate peak flow rates, subsurface infiltration and detention ponds are proposed, 
which will collect runoff from the collection network and attenuate peak flow rates and volumes. 
Further discussion is provided below. 
INFILTRATION & DETENTION (Drainage Area Map DA-03A) 
The proposed stormwater network consists of a series of infiltration and detention methods to attenuate 
peak flow rates. 
PROPOSED AREA 01A (SITE-PR-01A) 
Stormwater runoff within PR-01A will discharge to the following structures: 
• INF-01B – Stormtech SC-740 subsurface infiltration systems consisting of 40 units to promote 
treatment and infiltration. 
• POND-01A – Wet extended detention pond used for peak runoff attenuation with a shallow 8” 
deep wet pool and filter bed to promote treatment and infiltration. 
o POND-01A will discharge through outlet control structure 01A (OCS 01A) with staged 
outlets to regulate outflow, emergency overflow weir, and riprap plunge pool to 
dissipate energy and velocity before flowing towards the downstream wetlands. 
PROPOSED AREA 02A (SITE-PR-02A) 
Stormwater runoff within PR-02A will discharge to the following structures: 
• POND-02A – Wet extended detention pond used for peak runoff attenuation with a shallow 
12” deep wet pool and filter bed to promote treatment and infiltration from contributing area. 
o POND-02A will discharge through outlet control structure 02A (OCS 02A) with staged 
outlets to regulate outflow, emergency overflow weir, and riprap plunge pool to 
dissipate energy and velocity before flowing towards the downstream wetlands. 
PROPOSED AREA 03A (SITE-PR-03A) 
Stormwater runoff within PR-03A will discharge to the following structures: 
• POND-03A – Wet extended detention pond used for peak runoff attenuation with a shallow 9” 
deep wet pool and filter bed to promote treatment and infiltration from contributing area. 

 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
5 
o POND-03A will discharge through outlet control structure 03A (OCS 03A) with staged 
outlets to regulate outflow, emergency overflow weir, and riprap plunge pool to 
dissipate energy and velocity before flowing towards the downstream wetlands. 
• INF-03A - Stormtech SC-740 subsurface infiltration systems consisting of 30 units to promote 
treatment and infiltration. Overflow from the subsurface system flows into POND-03A. 
• POND-03B – Wet extended detention pond used for peak runoff attenuation with a shallow 9” 
deep wet pool and filter bed to promote treatment and infiltration from contributing area. 
o POND-03B will discharge through outlet control structure 03B (OCS 03B) with staged 
outlets to regulate outflow, emergency overflow weir, and riprap plunge pool to 
dissipate energy and velocity before flowing towards the downstream wetlands. 
• INF-03B - Stormtech SC-740 subsurface infiltration systems consisting of 40 units to promote 
treatment and infiltration. Overflow from the subsurface system flows into POND-03B. 
The combination of subsurface infiltration systems and wet extended detention ponds have been sized 
to attenuate peak flow rates and volumes as compared to pre-development conditions for the 2-, 5-, 
10-, 25-, 50-, and 100-year storm events. 
STORM 
EVENT 
AREA 01 
AREA 02 
AREA 03 
TOTAL SITE 
SITE-
EX-01 
SITE-
PR-
01A 
EX 
SITE-
EX-02 
SITE-
PR-
02A 
EX 
SITE-
EX-03 
SITE-
PR-
03A 
EX 
SITE-
EX 
SITE-
PR-
DET-
A 
EX 
vs. 
vs. 
vs. 
vs. 
PR 
PR 
PR 
PR 
2-yr 
1.15 
1.15 
0.00 
0.30 
0.37 
0.07 
0.81 
0.81 
0.00 
2.26 
2.24 
-0.02 
5-yr 
3.09 
2.53 
-0.56 
0.86 
0.75 
-0.11 
2.34 
2.21 
-0.13 
6.29 
4.96 
-1.33 
10-yr 
5.20 
3.89 
-1.31 
1.49 
1.62 
0.13 
4.03 
4.38 
0.35 
10.71 
8.91 
-1.80 
25-yr 
8.63 
5.89 
-2.74 
2.52 
3.34 
0.82 
6.83 
7.76 
0.93 
17.98 
16.56 
-1.42 
50-yr 
11.45 
7.83 
-3.62 
3.37 
4.33 
0.96 
9.14 
11.17 
2.03 
23.95 
22.90 
-1.05 
100-yr 
14.69 
10.00 
-4.69 
4.36 
5.31 
0.95 
11.82 
14.23 
2.41 
30.85 
28.81 
-2.04 
TABLE 2: PEAK FLOW COMPARISON - EXISTING VS. PROPOSED (WITH DETENTION) 
As shown in Table 2 above, incorporation of the infiltration and detention systems into the proposed 
development results in a decrease in peak flow rates as compared to existing conditions for the entire 
Site. Although there are minor increases within with the individual subareas, these increases are 
eliminated for entire Site due to offsetting storage capacity and times to peak flow. The plan provides 
for zero net increase in peak flow rates and volumes for all storms up to the 100-year event. 
STORMWATER QUALITY & TREATMENT  
 
The proposed development has been designed to reduce stormwater runoff and pollutant loads to the 
maximum extent possible and to treat the required water quality volume and flow per the CT DEEP 
2004 Stormwater Quality Manual (2004 DEEP Manual). The proposed measures incorporated into the 
plan include: 
• Maximize conservation and preservation of natural features. Impervious surfaces and buildings 
generally fall within historic limits of site disturbance activities. Stone walls, rock outcrops, 
and specimen trees have been preserved. 
• Minimize clearing and grubbing maintain native vegetation on site. Where clearing of the 
mature tree vegetation is proposed within 50’ of the delineated inland wetlands, native shrubs 

 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
6 
and/or conservation seed mixes are proposed to provide a minimum 50’ upland protection zone 
as recommended in the JBWMP. 
• Minimize building footprint. Buildings have been designed to accommodate site grades and 
unit areas were condensed to maximizing the number of units in a limit footprint area. 
• Minimize impervious surfaces for roadways and parking. Curb cuts and access drives are the 
minimum required for adequate site access and the proposed parking quantity has been reduced 
to the minimum allowed per zoning requirements. Impervious area totals 21% of the total site, 
which is on the low end of the 18% to 30% impervious cover referenced in Section 3.1.2.3 of 
the JBWMP for “intermediate” level uses such as multi-family. 
• Disconnect impervious areas where possible, such as sidewalks. Disconnected impervious 
areas were not subtracted from the treatment calculations as a conservative measure. 
• Collect, treat, and infiltrate to encourage groundwater recharge including the incorporation of 
base level and secondary controls to improve water quality as recommended by the JBWMP. 
WATER QUALITY VOLUME & FLOW (Drainage Area Map DA-03A) 
Water quality volumes and flows were calculated for all proposed impervious surfaces for the 
driveway, parking and building areas in accordance with the 2004 DEEP Manual. 
AREA 
DA 
IA 
WQV 
WQF 
WQF 
PROPOSED TREATMENT 
Label 
acre 
acre 
acre-ft 
cfs 
sf 
Method 
Vol 
Flow 
Area 
Note 
POND 01A 
4.334 
1.626 
0.140 
1.000 
N/A 
Sediment Forebay 
0.16 
N/A 
N/A 
116% WQV 
POND 01A 
4.334 
1.626 
0.140 
1.000 
1043 
Filter Bed 
N/A 
N/A 
1200 
115% WQF 
INF 01B 
0.930 
0.569 
0.047 
0.524 
N/A 
SC-740 Isolator 
N/A 
1.2 
N/A 
229% WQV 
POND 02A 
2.877 
1.454 
0.121 
0.953 
N/A 
Sediment Forebay 
0.055 
N/A 
N/A 
46% WQV 
POND 02A 
2.877 
1.454 
0.121 
0.953 
753 
Filter Bed 
N/A 
N/A 
2100 
278% WQF 
POND 03A 
0.631 
0.272 
0.023 
0.250 
N/A 
Sediment Forebay 
0.041 
N/A 
N/A 
179% WQV 
POND 03A 
0.631 
0.272 
0.023 
0.250 
164 
Filter Bed 
N/A 
N/A 
1000 
610% WQF 
INF 03A 
0.823 
0.628 
0.051 
0.483 
N/A 
SC-740 Isolator 
N/A 
1.5 
N/A 
310% WQV 
POND 03B 
1.897 
0.465 
0.043 
0.369 
N/A 
Sediment Forebay 
N/A 
N/A 
N/A 
N/A [1] 
POND 03B 
1.897 
0.465 
0.043 
0.369 
304 
Filter Bed 
N/A 
N/A 
1400 
461% WQF 
INF 03B 
0.750 
0.601 
0.048 
0.542 
N/A 
SC-740 Isolator 
N/A 
1.2 
N/A 
221% WQV 
TABLE 3: PROPOSED TREATMENT SUMMARY 
1. No Sediment Load from Building Roof or Patio. Runoff flows through vegetated filter swale to filter bed. 
As shown in Table 3 above, the proposed treatment measures will adequately retain the calculated 
water quality volume and/or treat the calculated water quality flow, removing 80% or more of total 
suspended solids and floatable debris for the first inch of rainfall before discharging to the Site 
wetlands 
GROUNDWATER RECHARGE VOLUME  
Existing non-wetland soils are classified as Charlton-Chatfield complex (HSG B) and the wetland 
soils as Ridgebury, Leicester, and Whitman (HSG D). Required Groundwater Recharge Volumes 
(GRV) were calculated in accordance with 2004 DEEP Manual based upon the area of each 
Hydrologic Soil Group. 
GRV (required) 
= 0.076 acre-feet 

 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVE. EXT. 
 
WATERFORD, CONNECTICUT 
7 
GRV (provided) = 0.272 acre-feet 
The combination of sediment and filtration basins, subsurface infiltration systems, and shallow 
depressions within each wet extended detention pond provide adequate capacity to fully retain nearly 
4 times the recommended groundwater recharge volume, thereby exceeding the GRV requirement. 
CONCLUSION 
 
There will be no increase in peak flow rates or volumes discharging to the downgradient wetlands or 
adjacent properties. The stormwater network will maintain approved drainage patterns and utilize a 
combination of subsurface infiltration and detention ponds to regulate any increase in run-off on site. 
Stormwater will be treated in accordance with the CT DEEP 2004 Stormwater Quality Manual. 
No adverse impacts to the site, adjacent wetlands, or municipal systems are anticipated. 


 
 
 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVENUE EXT. 
 
WATERFORD, CONNECTICUT 
 
 
 
 
 
 
APPENDIX A 
DRAINAGE AREA MAPS 
Existing Conditions DA-01A 
Proposed Conditions DA-02A 
Proposed Detention DA 03A 
 


FENGER
BROOK
#12
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 CENTERLINE STRIPE
DOUBLE YELLOW
 STRIPE
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SOLID WHITE
 STRIPE
 SHOULDER
SOLID WHITE
24 in. WATER MAIN
12 in. WATER MAIN
12 in. METAL
#4269
EVERSOURCE 
POLE & NEW 
OLD HELTCO 
 IN/OUT=57.47(SE/NW, BOTH 18 in. RCP)
CATCH BASIN, TF=60.87, INV
#4275 w/TRANS.
HELTCO POLE  
#1732 w/LIGHT
HELTCO POLE  
 OUT=60.40 (SE/NW, BOTH 18 in. RCP)
CATCH BASIN, TF=64.25, INV IN=61.95, INV
6 in. GAS MAIN
SMH90
SMH91
SMH92
INV IN=69.76, INV OUT=68.66
CATCH BASIN, TF=72.26
8 in. SANITARY MAIN
 OAK
42 in.
 OAK
42 in.
#17
WF
 15 in. RCP PER REFERENCE MAP #2I)
(NO OTHER VISIBLE PIPES, OUTLET IS
CATCH BASIN, TF=61.27, INV=59.17(NE)
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WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
AREA
WOODED
AREA
WOODED
AREA
WOODED
AREA
WOODED
AREA
WOODED
ROAD
WOODS 
ROAD
WOODS 
ROAD
WOODS 
ROAD
WOODS 
#390
HOUSE 
DECK
YARD
GRASS 
DRIVEWAY
ASPHALT 
SIDEWALK
ASPHALT 
#384
HOUSE 
#396A
BUILDING 
PORCH
BOULDERS
LARGE 
ROCKS AND 
PILE OF 
PILE
DEBRIS 
PILE
BRICK 
PILE
TIRE
MOUND
ROCKY 
NOT SURVEYED
* BUILDING DIGITIZED 
 #396
BUILDING
 #398
BUILDING
OAK
42 in. 
OAK
36 in. 
OAK
48 in. 
S
G
S
S
WG
16
22
22
28
22
22
16
18
22
24
26
28
32
34
36
38
42
44
44
46
48
52
54
56
58
62
64
66
68
72
74
76
74
72
68
66
64
62
58
58
56
54
52
48
46
44
42
38
38
38
36
34
32
28
26
22
18
18
22
24
26
26
24
22
18
16
28
72
48
34
32
28
26
24
28
26
28
28
30
40
50
60
70
70
50
40
30
20
20
20
30
20
30
40
50
20
30
20
 SURVEYED
 DIGITIZED NOT
* BUILDINGS PARTIALLY
20
20
44
60
                           WATERFORD, CT
CONTACT INFORMATION
LEBANON, CONN 06249
191 NORWICH AVENUE
YANTIC RIVER CONSULTANTS, LLC
www.yanticriverconsultants.com
Web:
yanticriver@gmail.com
Email:
(860) 367-7264
Phone:
384 & 394 WILLETTS AVE. EXT.        
SCALE:   1" =   160'
00096 - 001  
 160
0
 160
PROJECT NO:
DATE:
SHEET NO:
11/18/20
DA-01A
                       WATERFORD WOODS                      
                   PREPARED FOR SIG CON ASSOCIATES, LLC                   
        DRAINAGE MAP - EXISTING CONDITIONS SITE ONLY        
73C
73C
3
17
17
3
306
73C
W ILLETTS AVENUE EXTENSION
LEGEND
77(D)
WETLANDS (WOODS)
55
WOODS (GOOD)
58
MEADOW/BRUSH
61
OPEN SPACE (GOOD)
98
IMPERVIOUS
NRCS SOIL
TC PATH - CHANNEL
TC PATH - SHALLOW
TC PATH - SHEET
D.A. LIMIT
CN B
ITEM
WOODS (GOOD) = 6.872
MEADOW/BRUSH (GOOD) = 0.434
OPEN SPACE (GOOD) = 0.818
IMPERVIOUS = 0.058
TOTAL AREA = 8.182 AC
DRAINAGE AREA 'SITE-EX-01'
AREA = 3.609 AC
WETLANDS
AREA = 5.585 AC
WETLANDS
WOODS (GOOD) = 6.764
TOTAL AREA = 6.764 AC
DRAINAGE AREA 'SITE-EX-03'
FOR HYDROLOGIC ANALYSIS
AREA FOLLOWS PROPERTY LINE
DOWNSTREAM LIMIT OF DRAINAGE
FOR HYDROLOGIC ANALYSIS
AREA FOLLOWS PROPERTY LINE
DOWNSTREAM LIMIT OF DRAINAGE
FOR HYDROLOGIC ANALYSIS
AREA FOLLOWS PROPERTY LINE
UPSTREAM LIMIT OF DRAINAGE
WOODS (GOOD) = 2.495
TOTAL AREA = 2.495 AC
DRAINAGE AREA 'SITE-EX-02'
ELEV.= 71±
ELEV.= 60±
MEADOW/WOODS @ 5.5%
SHEET FLOW - 200'
WOODS @ 4.8%
SHALLOW CONC.- 650'
ELEV.= 44±
ELEV.= 34±
ELEV. = 29±
INLAND WETLANDS
DISCHARGE POINT AT
ELEV. = 22±
INLAND WETLANDS
DISCHARGE POINT AT
MEADOW/WOODS @ 5.0%
SHEET FLOW - 200'
WOODS @ 5.7%
SHALLOW CONC.- 210'
BOUNDARY
NRCS SOIL

FENGER
BROOK
#12
WF
#11
WF
#10
WF
#9
WF
#8
WF
#7
WF
#6
WF
#5
WF
#4
WF
#1
WF
#26
WF
#25
WF
#24
WF
#23
WF
#22
WF
#21
WF
#3
WF
#19
WF
WF#18
#16
WF
#13,14
WFs
#15
WF
#20
WF
 CENTERLINE STRIPE
DOUBLE YELLOW
 STRIPE
 SHOULDER
SOLID WHITE
 STRIPE
 SHOULDER
SOLID WHITE
 OAK
42 in.
 OAK
42 in.
#17
WF
#48
WF
#49
WF
#50
WF
#52
WF
#53
WF
#54
WF
#55
WF
#56
WF
#57
WF
#58
WF
#59
WF
#60
WF
#61
WF
#62
WF
#63
WF
#64
WF
#65
WF
#66
WF
#67
WF
#68
WF
#69
WF
#70
WF
#71
WF
#72
WF
#73
WF
#74
WF
#75
WF
WF#76
#77
WF
#78
WF
#79-81
WFs
#84
WF
#85
WF
#86
WF
#88
WF
#87
WF
#89
WF
#90
WF
#91
WF
#92
WF
#93B
WF
#93
WF
#94
WF
#35
WF
#28
WF
#29
WF
#30
WF
#31
WF
#32
WF
#33
WF
#27
WF
#34
WF
#36
WF
#37
WF
#38
WF
#39
WF
#40
WF
#41
WF
#42
WF
#43
WF
#44
WF
#45
WF
#46
WF
#47
WF
#82
WF
#83
WF
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
AREA
WOODED
AREA
WOODED
AREA
WOODED
AREA
WOODED
AREA
WOODED
ROAD
WOODS 
ROAD
WOODS 
ROAD
WOODS 
ROAD
WOODS 
#390
HOUSE 
DECK
YARD
GRASS 
DRIVEWAY
ASPHALT 
SIDEWALK
ASPHALT 
#384
HOUSE 
#396A
BUILDING 
PORCH
BOULDERS
LARGE 
ROCKS AND 
PILE OF 
PILE
DEBRIS 
PILE
BRICK 
PILE
TIRE
MOUND
ROCKY 
NOT SURVEYED
* BUILDING DIGITIZED 
 #396
BUILDING
 #398
BUILDING
OAK
42 in. 
OAK
36 in. 
OAK
48 in. 
S
G
S
S
WG
16
22
22
28
22
22
16
18
22
24
26
28
32
34
36
38
42
44
44
46
48
52
54
56
58
62
64
66
68
72
74
76
74
72
68
66
64
62
58
58
56
54
52
48
46
44
42
38
38
38
36
34
32
28
26
22
18
18
22
24
26
26
24
22
18
16
28
72
48
34
32
28
26
24
28
26
28
28
30
40
50
60
70
70
50
40
30
20
20
20
30
20
30
40
50
20
30
20
 SURVEYED
 DIGITIZED NOT
* BUILDINGS PARTIALLY
20
20
44
60
                           WATERFORD, CT
CONTACT INFORMATION
LEBANON, CONN 06249
191 NORWICH AVENUE
YANTIC RIVER CONSULTANTS, LLC
www.yanticriverconsultants.com
Web:
yanticriver@gmail.com
Email:
(860) 367-7264
Phone:
384 & 394 WILLETTS AVE. EXT.        
SCALE:   1" =   160'
00096 - 001  
 160
0
 160
PROJECT NO:
DATE:
SHEET NO:
02/17/22
DA-02A
                       WATERFORD WOODS                      
                   PREPARED FOR SIG CON ASSOCIATES, LLC                   
        DRAINAGE MAP - PROPOSED CONDITIONS SITE ONLY        
73C
73C
3
17
17
3
306
73C
50
50
30
60
40
30
30
30
50
40
40
40
30
30
20
30
20
W ILLETTS AVENUE EXTENSION
LEGEND
77(D)
WETLANDS (WOODS)
55
WOODS (GOOD)
58
MEADOW/BRUSH
61
OPEN SPACE (GOOD)
98
IMPERVIOUS
NRCS SOIL
TC PATH - CHANNEL
TC PATH - SHALLOW
TC PATH - SHEET
D.A. LIMIT
CN B
ITEM
AREA = 3.609 AC
WETLANDS
AREA = 5.585 AC
WETLANDS
FOR HYDROLOGIC ANALYSIS
AREA FOLLOWS PROPERTY LINE
DOWNSTREAM LIMIT OF DRAINAGE
FOR HYDROLOGIC ANALYSIS
AREA FOLLOWS PROPERTY LINE
UPSTREAM LIMIT OF DRAINAGE
ELEV.= 68±
ELEV.= 59±
GRASS @ 3.3%
SHALLOW CONC.- 900'
ELEV. = 29±
INLAND WETLANDS
DISCHARGE POINT AT
ELEV. = 22±
INLAND WETLANDS
DISCHARGE POINT AT
ELEV.= 71±
ELEV.= 48±
ELEV.= 62±
ELEV.= 53±
GRASS @ 4.5%
SHEET FLOW - 200'
GRASS @ 4.5%
SHALLOW CONC.- 200'
900' @ 3.3%
SHALLOW CONC.
WOODS (GOOD) = 0.691
MEADOW / BRUSH = 0.643
OPEN SPACE (GOOD) = 1.114
IMPERVIOUS = 1.454
TOTAL AREA = 3.902 AC
DRAINAGE AREA 'SITE-PR-02'
WOODS (GOOD) = 1.216
MEADOW / BRUSH = 0.544
OPEN SPACE (GOOD) = 2.747
IMPERVIOUS = 2.195
TOTAL AREA = 6.702 AC
DRAINAGE AREA 'SITE-PR-01'
ELEV.= 26±
ELEV.= 24±
ELEV.= 17±
180' @ 5%
SHEET FLOW
200' @ 2%
SHEET FLOW
200' @ 4.5%
SHEET FLOW
WOODS (GOOD) = 0.777
MEADOW / BRUSH = 0.162
OPEN SPACE (GOOD) = 0.593
IMPERVIOUS = 0.904
TOTAL AREA = 2.436 AC
DRAINAGE AREA 'SITE-PR-03A'
WOODS (GOOD) = 1.445
MEADOW / BRUSH = 0.289
OPEN SPACE (GOOD) = 1.601
IMPERVIOUS = 1.066
TOTAL AREA = 4.401 AC
DRAINAGE AREA 'SITE-PR-03B'
BOUNDARY
NRCS SOIL
400' @ 2%
SHALLOW CONC.
ELEV.= 20.0±
INLAND WETLANDS
DISCHARGE POINT AT

FENGER
BROOK
#12
WF
#11
WF
#10
WF
#9
WF
#8
WF
#7
WF
#6
WF
#5
WF
#4
WF
#1
WF
#26
WF
#25
WF
#24
WF
#23
WF
#22
WF
#21
WF
#3
WF
#19
WF
WF#18
#16
WF
#13,14
WFs
#15
WF
#20
WF
 CENTERLINE STRIPE
DOUBLE YELLOW
 STRIPE
 SHOULDER
SOLID WHITE
 STRIPE
 SHOULDER
SOLID WHITE
 OAK
42 in.
 OAK
42 in.
#17
WF
#48
WF
#49
WF
#50
WF
#52
WF
#53
WF
#54
WF
#55
WF
#56
WF
#57
WF
#58
WF
#59
WF
#60
WF
#61
WF
#62
WF
#63
WF
#64
WF
#65
WF
#66
WF
#67
WF
#68
WF
#69
WF
#70
WF
#71
WF
#72
WF
#73
WF
#74
WF
#75
WF
WF#76
#77
WF
#78
WF
#79-81
WFs
#84
WF
#85
WF
#86
WF
#88
WF
#87
WF
#89
WF
#90
WF
#91
WF
#92
WF
#93B
WF
#93
WF
#94
WF
#35
WF
#28
WF
#29
WF
#30
WF
#31
WF
#32
WF
#33
WF
#27
WF
#34
WF
#36
WF
#37
WF
#38
WF
#39
WF
#40
WF
#41
WF
#42
WF
#43
WF
#44
WF
#45
WF
#46
WF
#47
WF
#82
WF
#83
WF
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
WETLAND AREA
WOODED 
AREA
WOODED
AREA
WOODED
AREA
WOODED
AREA
WOODED
AREA
WOODED
ROAD
WOODS 
ROAD
WOODS 
ROAD
WOODS 
ROAD
WOODS 
#390
HOUSE 
DECK
YARD
GRASS 
DRIVEWAY
ASPHALT 
SIDEWALK
ASPHALT 
#384
HOUSE 
#396A
BUILDING 
PORCH
BOULDERS
LARGE 
ROCKS AND 
PILE OF 
PILE
DEBRIS 
PILE
BRICK 
PILE
TIRE
MOUND
ROCKY 
NOT SURVEYED
* BUILDING DIGITIZED 
 #396
BUILDING
 #398
BUILDING
OAK
42 in. 
OAK
36 in. 
OAK
48 in. 
S
G
S
S
WG
16
22
22
28
22
22
16
18
22
24
26
28
32
34
36
38
42
44
44
46
48
52
54
56
58
62
64
66
68
72
74
76
74
72
68
66
64
62
58
58
56
54
52
48
46
44
42
38
38
38
36
34
32
28
26
22
18
18
22
24
26
26
24
22
18
16
28
72
48
34
32
28
26
24
28
26
28
28
30
40
50
60
70
70
50
40
30
20
20
20
30
20
30
40
50
20
30
20
 SURVEYED
 DIGITIZED NOT
* BUILDINGS PARTIALLY
20
20
44
60
                           WATERFORD, CT
CONTACT INFORMATION
LEBANON, CONN 06249
191 NORWICH AVENUE
YANTIC RIVER CONSULTANTS, LLC
www.yanticriverconsultants.com
Web:
yanticriver@gmail.com
Email:
(860) 367-7264
Phone:
384 & 394 WILLETTS AVE. EXT.        
SCALE:   1" =   160'
00096 - 001  
 160
0
 160
PROJECT NO:
DATE:
SHEET NO:
02/17/22
DA-03A
                       WATERFORD WOODS                      
                   PREPARED FOR SIG CON ASSOCIATES, LLC                   
              DRAINAGE MAP - PROPOSED DETENTION             
50
50
30
60
40
30
30
30
50
40
40
40
30
30
20
30
20
W ILLETTS AVENUE EXTENSION
LEGEND
77(D)
WETLANDS (WOODS)
55
WOODS (GOOD)
58
MEADOW/BRUSH
61
OPEN SPACE (GOOD)
98
IMPERVIOUS
NRCS SOIL
TC PATH - CHANNEL
TC PATH - SHALLOW
TC PATH - SHEET
D.A. LIMIT
CN B
ITEM
AREA = 3.609 AC
WETLANDS
AREA = 5.585 AC
WETLANDS
BOUNDARY
NRCS SOIL
WOODS (GOOD) = 0.000
OPEN SPACE (GOOD) = 0.361
IMPERVIOUS = 0.569
TOTAL AREA = 0.930 AC
DRAINAGE AREA 'INF-01B'
WOODS (GOOD) = 0.260
MEADOW/BRUSH = 0.403
OPEN SPACE (GOOD) = 2.045
IMPERVIOUS = 1.626
TOTAL AREA = 4.334 AC
DRAINAGE AREA 'POND-01A'
WOODS (GOOD) = 0.956
MEADOW/BRUSH = 0.141
OPEN SPACE (GOOD) = 0.341
IMPERVIOUS = 0.000
TOTAL AREA = 1.438 AC
DRAINAGE AREA 'PR-01A'
WOODS (GOOD) = 0.000
MEADOW/BRUSH = 0.368
OPEN SPACE (GOOD) = 1.055
IMPERVIOUS = 1.454
TOTAL AREA = 2.877 AC
DRAINAGE AREA 'POND-02A'
WOODS (GOOD) = 0.691
MEADOW/BRUSH = 0.275
OPEN SPACE (GOOD) = 0.059
IMPERVIOUS = 0.000
TOTAL AREA = 1.025 AC
DRAINAGE AREA 'PR-02A'
FOR HYDROLOGIC ANALYSIS
AREA FOLLOWS PROPERTY LINE
DOWNSTREAM LIMIT OF DRAINAGE
1,400 SF
FB-03B
1,000 SF
FB-03A
1,500 SF
FB-01A
2,100 SF
FB-01A
WOODS (GOOD) = 1.303
MEADOW / BRUSH = 0.074
OPEN SPACE (GOOD) = 0.377
IMPERVIOUS = 0.000
TOTAL AREA = 1.754 AC
DRAINAGE AREA 'PR-03B'
WOODS (GOOD) = 0.412
MEADOW / BRUSH = 0.215
OPEN SPACE (GOOD) = 1.705
IMPERVIOUS = 0.465
TOTAL AREA = 1.897 AC
DRAINAGE AREA 'POND-03B'
WOODS (GOOD) = 0.000
MEADOW / BRUSH = 0.000
OPEN SPACE (GOOD) = 0.149
IMPERVIOUS = 0.601
TOTAL AREA = 0.750 AC
DRAINAGE AREA 'INF-03B'
WOODS (GOOD) = 0.668
MEADOW / BRUSH = 0.043
OPEN SPACE (GOOD) = 0.267
IMPERVIOUS = 0.004
TOTAL AREA = 0.982 AC
DRAINAGE AREA 'PR-03A'
WOODS (GOOD) = 0.089
MEADOW / BRUSH = 0.119
OPEN SPACE (GOOD) = 0.151
IMPERVIOUS = 0.272
TOTAL AREA = 0.631 AC
DRAINAGE AREA 'POND-03A'
WOODS (GOOD) = 0.020
MEADOW / BRUSH = 0.000
OPEN SPACE (GOOD) = 0.175
IMPERVIOUS = 0.628
TOTAL AREA = 0.823 AC
DRAINAGE AREA 'INF-03A'


 
 
 
WATERFORD WOODS APARTMENTS PHASE 2 
 
384 & 394 WILLETTS AVENUE EXT. 
 
WATERFORD, CONNECTICUT 
 
 
 
 
 
 
APPENDIX B 
HYDROLOGIC COMPUTATIONS 
HYDROLOGY STUDIO REPORT 
 


Table of Contents
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Basin Model Schematic
1
......................................................................................................................................
Hydrograph by Return Period
2
............................................................................................................................
2 - Year
Hydrograph Summary
4
..................................................................................................................................
5 - Year
Hydrograph Summary
6
..................................................................................................................................
10 - Year
Hydrograph Summary
8
..................................................................................................................................
25 - Year
Hydrograph Summary
10
................................................................................................................................
50 - Year
Hydrograph Summary
12
................................................................................................................................
100 - Year
Hydrograph Summary
14
................................................................................................................................
IDF Report
16
.........................................................................................................................................................
Precipitation Report
17
..........................................................................................................................................

Basin Model
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
1

Hydrograph by Return Period
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak Outflow (cfs)
1-yr
2-yr
3-yr
5-yr
10-yr
25-yr
50-yr
100-yr
1
NRCS Runoff
EX-01
9.328
20.10
30.75
47.38
60.64
75.64
2
NRCS Runoff
PR-01
14.24
27.12
39.27
57.79
72.27
88.49
3
NRCS Runoff
SITE-EX-01
1.146
3.092
5.196
8.632
11.45
14.69
4
NRCS Runoff
SITE-EX-02
0.299
0.861
1.486
2.519
3.372
4.359
5
NRCS Runoff
SITE-EX-03
0.811
2.335
4.028
6.830
9.141
11.82
6
Junction
SITE-EX
2.256
6.287
10.71
17.98
23.95
30.85
7
NRCS Runoff
SITE-PR-01
4.634
7.681
10.41
14.45
17.52
20.89
8
NRCS Runoff
SITE-PR-02
3.195
5.181
6.945
9.530
11.49
13.64
9
NRCS Runoff
SITE-PR-03B
2.527
4.488
6.291
8.999
11.08
13.41
10
NRCS Runoff
SITE-PR-03A
2.047
3.352
4.515
6.224
7.521
8.942
11
Junction
SITE-PR-03
4.535
7.786
10.75
15.14
18.51
22.24
12
Junction
SITE-PR
12.26
20.47
27.86
38.74
47.08
56.24
13
Pond Route
POND-PR-01
0.658
2.596
3.861
6.874
10.70
11.48
14
Pond Route
POND-PR-02
0.309
0.594
1.644
3.227
4.024
4.722
15
Pond Route
POND-PR-03A
0.426
1.489
2.099
4.050
4.912
5.457
16
Pond Route
POND-PR-03B
0.293
1.286
2.246
4.199
4.719
6.880
17
Junction
POND-PR-03
0.692
2.696
4.287
8.136
9.497
12.16
18
Junction
SITE-PR-DET
1.584
5.633
9.657
17.16
23.97
28.20
19
NRCS Runoff
PR-01A
0.280
0.744
1.248
2.063
2.723
3.483
20
NRCS Runoff
POND-01A
3.479
5.561
7.405
10.09
12.11
14.33
21
NRCS Runoff
INF-01B
1.894
2.703
3.384
4.346
5.055
5.817
22
NRCS Runoff
PR-02A
0.175
0.478
0.809
1.352
1.795
2.302
23
NRCS Runoff
POND-02A
3.280
4.919
6.330
8.342
9.840
11.46
24
NRCS Runoff
PR-03A
0.184
0.474
0.783
1.285
1.693
2.162
25
NRCS Runoff
POND-03A
0.836
1.312
1.728
2.329
2.781
3.272
26
NRCS Runoff
INF-03A
1.671
2.272
2.768
3.457
3.961
4.502
27
NRCS Runoff
PR-03B
0.326
0.880
1.486
2.472
3.272
4.192
28
NRCS Runoff
POND-03B
1.613
3.010
4.310
6.283
7.814
9.517
29
NRCS Runoff
INF-03B
1.978
2.651
3.204
3.971
4.533
5.135
30
Pond Route
INF-PR-01B
0.719
1.637
2.399
3.112
4.145
4.975
31
Pond Route
POND-PR-01A
0.404
1.262
2.605
3.890
4.633
7.649
32
Junction
SITE-PR-01A
1.145
2.531
3.889
5.889
7.828
9.996
33
Pond Route
POND-PR-02A
0.318
0.521
1.416
2.855
3.616
4.217
34
Pond Route
POND-INF-03A
0.938
1.878
2.582
3.338
3.846
4.392
35
Junction
POND-03A COMB
1.416
2.616
3.847
5.320
6.261
7.253
36
Pond Route
POND-PR-03A1
0.310
0.856
1.427
2.080
3.058
4.137
2

Hydrograph by Return Period
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak Outflow (cfs)
1-yr
2-yr
3-yr
5-yr
10-yr
25-yr
50-yr
100-yr
37
Pond Route
POND-INF-03B
0.696
1.005
1.978
3.419
4.165
4.859
38
Junction
POND-03B COMB
2.292
3.995
6.276
9.356
11.44
13.64
39
Pond Route
POND-PR-03B1
0.231
0.919
1.571
3.286
4.235
4.768
40
Junction
SITE-PR-02A
0.365
0.746
1.624
3.342
4.326
5.308
41
Junction
SITE-PR-03A1
0.401
1.052
2.061
3.217
4.547
6.160
42
Junction
SITE-PR-03B1
0.418
1.160
2.332
4.593
6.723
8.271
43
Junction
SITE-PR-03A
0.811
2.207
4.382
7.755
11.17
14.23
44
Junction
SITE-PR-DET-A
2.240
4.958
8.914
16.56
22.90
28.81
3

Hydrograph 2-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
1
NRCS Runoff
EX-01
9.328
12.65
78,149
----
2
NRCS Runoff
PR-01
14.24
12.58
102,734
----
3
NRCS Runoff
SITE-EX-01
1.146
12.60
10,688
----
4
NRCS Runoff
SITE-EX-02
0.299
12.60
2,921
----
5
NRCS Runoff
SITE-EX-03
0.811
12.60
7,918
----
6
Junction
SITE-EX
2.256
12.60
21,526
3, 4, 5
7
NRCS Runoff
SITE-PR-01
4.634
12.38
25,874
----
8
NRCS Runoff
SITE-PR-02
3.195
12.32
16,236
----
9
NRCS Runoff
SITE-PR-03B
2.527
12.35
13,751
----
10
NRCS Runoff
SITE-PR-03A
2.047
12.27
9,917
----
11
Junction
SITE-PR-03
4.535
12.32
23,668
9, 10
12
Junction
SITE-PR
12.26
12.35
65,778
7, 8, 11
13
Pond Route
POND-PR-01
0.658
14.10
20,126
7
31.66
12,091
14
Pond Route
POND-PR-02
0.309
14.78
9,471
8
29.21
8,333
15
Pond Route
POND-PR-03A
0.426
12.92
6,064
10
22.25
3,751
16
Pond Route
POND-PR-03B
0.293
13.87
6,480
9
18.71
5,440
17
Junction
POND-PR-03
0.692
12.98
12,544
15, 16
18
Junction
SITE-PR-DET
1.584
13.95
42,140
13, 14, 17
19
NRCS Runoff
PR-01A
0.280
12.37
2,009
----
20
NRCS Runoff
POND-01A
3.479
12.38
18,977
----
21
NRCS Runoff
INF-01B
1.894
12.10
6,085
----
22
NRCS Runoff
PR-02A
0.175
12.40
1,326
----
23
NRCS Runoff
POND-02A
3.280
12.30
16,018
----
24
NRCS Runoff
PR-03A
0.184
12.45
1,396
----
25
NRCS Runoff
POND-03A
0.836
12.12
2,945
----
26
NRCS Runoff
INF-03A
1.671
12.18
6,959
----
27
NRCS Runoff
PR-03B
0.326
12.37
2,384
----
28
NRCS Runoff
POND-03B
1.613
12.23
7,848
----
29
NRCS Runoff
INF-03B
1.978
12.08
6,483
----
30
Pond Route
INF-PR-01B
0.719
12.35
3,842
21
30.17
1,806
31
Pond Route
POND-PR-01A
0.404
14.38
13,603
20
31.26
9,262
32
Junction
SITE-PR-01A
1.145
12.42
19,455
19, 30, 31
33
Pond Route
POND-PR-02A
0.318
14.23
9,224
23
29.24
8,544
34
Pond Route
POND-INF-03A
0.938
12.40
3,279
26
24.53
1,713
35
Junction
POND-03A COMB
1.416
12.18
6,225
25, 34
36
Pond Route
POND-PR-03A1
0.310
13.10
3,238
35
22.07
3,177
4

Hydrograph 2-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
37
Pond Route
POND-INF-03B
0.696
12.32
2,207
29
23.79
1,838
38
Junction
POND-03B COMB
2.292
12.25
10,055
28, 37
39
Pond Route
POND-PR-03B1
0.231
13.50
3,772
38
18.54
4,494
40
Junction
SITE-PR-02A
0.365
13.72
10,550
22, 33
41
Junction
SITE-PR-03A1
0.401
12.57
4,634
24, 36
42
Junction
SITE-PR-03B1
0.418
12.50
6,156
27, 39
43
Junction
SITE-PR-03A
0.811
12.53
10,790
41, 42
44
Junction
SITE-PR-DET-A
2.240
12.50
40,795
32, 40, 43
5

Hydrograph 5-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
1
NRCS Runoff
EX-01
20.10
12.58
143,800
----
2
NRCS Runoff
PR-01
27.12
12.53
177,649
----
3
NRCS Runoff
SITE-EX-01
3.092
12.52
21,793
----
4
NRCS Runoff
SITE-EX-02
0.861
12.50
6,121
----
5
NRCS Runoff
SITE-EX-03
2.335
12.50
16,594
----
6
Junction
SITE-EX
6.287
12.50
44,508
3, 4, 5
7
NRCS Runoff
SITE-PR-01
7.681
12.37
41,240
----
8
NRCS Runoff
SITE-PR-02
5.181
12.30
25,500
----
9
NRCS Runoff
SITE-PR-03B
4.488
12.32
22,872
----
10
NRCS Runoff
SITE-PR-03A
3.352
12.27
15,672
----
11
Junction
SITE-PR-03
7.786
12.30
38,543
9, 10
12
Junction
SITE-PR
20.47
12.32
105,283
7, 8, 11
13
Pond Route
POND-PR-01
2.596
12.90
35,123
7
32.22
16,384
14
Pond Route
POND-PR-02
0.594
14.02
18,205
8
29.95
13,149
15
Pond Route
POND-PR-03A
1.489
12.62
11,505
10
22.74
5,239
16
Pond Route
POND-PR-03B
1.286
12.85
14,806
9
19.18
8,265
17
Junction
POND-PR-03
2.696
12.72
26,312
15, 16
18
Junction
SITE-PR-DET
5.633
12.82
79,639
13, 14, 17
19
NRCS Runoff
PR-01A
0.744
12.27
4,031
----
20
NRCS Runoff
POND-01A
5.561
12.37
29,511
----
21
NRCS Runoff
INF-01B
2.703
12.10
8,721
----
22
NRCS Runoff
PR-02A
0.478
12.30
2,698
----
23
NRCS Runoff
POND-02A
4.919
12.28
23,786
----
24
NRCS Runoff
PR-03A
0.474
12.35
2,786
----
25
NRCS Runoff
POND-03A
1.312
12.12
4,524
----
26
NRCS Runoff
INF-03A
2.272
12.18
9,564
----
27
NRCS Runoff
PR-03B
0.880
12.27
4,818
----
28
NRCS Runoff
POND-03B
3.010
12.22
13,388
----
29
NRCS Runoff
INF-03B
2.651
12.08
8,807
----
30
Pond Route
INF-PR-01B
1.637
12.20
6,219
21
30.55
2,212
31
Pond Route
POND-PR-01A
1.262
13.08
23,658
20
31.86
13,517
32
Junction
SITE-PR-01A
2.531
12.23
33,908
19, 30, 31
33
Pond Route
POND-PR-02A
0.521
13.92
16,512
23
29.91
12,890
34
Pond Route
POND-INF-03A
1.878
12.28
5,334
26
24.98
2,037
35
Junction
POND-03A COMB
2.616
12.27
9,858
25, 34
36
Pond Route
POND-PR-03A1
0.856
12.83
6,468
35
22.46
4,381
6

Hydrograph 5-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
37
Pond Route
POND-INF-03B
1.005
12.30
3,854
29
24.38
2,468
38
Junction
POND-03B COMB
3.995
12.22
17,242
28, 37
39
Pond Route
POND-PR-03B1
0.919
12.97
9,946
38
19.03
7,231
40
Junction
SITE-PR-02A
0.746
12.40
19,210
22, 33
41
Junction
SITE-PR-03A1
1.052
12.72
9,254
24, 36
42
Junction
SITE-PR-03B1
1.160
12.87
14,764
27, 39
43
Junction
SITE-PR-03A
2.207
12.73
24,018
41, 42
44
Junction
SITE-PR-DET-A
4.958
12.32
77,136
32, 40, 43
7

Hydrograph 10-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
1
NRCS Runoff
EX-01
30.75
12.55
207,139
----
2
NRCS Runoff
PR-01
39.27
12.50
247,960
----
3
NRCS Runoff
SITE-EX-01
5.196
12.47
32,965
----
4
NRCS Runoff
SITE-EX-02
1.486
12.45
9,376
----
5
NRCS Runoff
SITE-EX-03
4.028
12.45
25,418
----
6
Junction
SITE-EX
10.71
12.47
67,759
3, 4, 5
7
NRCS Runoff
SITE-PR-01
10.41
12.35
55,113
----
8
NRCS Runoff
SITE-PR-02
6.945
12.30
33,804
----
9
NRCS Runoff
SITE-PR-03B
6.291
12.30
31,278
----
10
NRCS Runoff
SITE-PR-03A
4.515
12.25
20,846
----
11
Junction
SITE-PR-03
10.75
12.28
52,123
9, 10
12
Junction
SITE-PR
27.86
12.32
141,040
7, 8, 11
13
Pond Route
POND-PR-01
3.861
12.85
48,730
7
32.81
21,212
14
Pond Route
POND-PR-02
1.644
12.92
26,263
8
30.27
15,635
15
Pond Route
POND-PR-03A
2.099
12.60
16,451
10
23.19
6,713
16
Pond Route
POND-PR-03B
2.246
12.75
22,657
9
19.60
11,071
17
Junction
POND-PR-03
4.287
12.72
39,108
15, 16
18
Junction
SITE-PR-DET
9.657
12.80
114,101
13, 14, 17
19
NRCS Runoff
PR-01A
1.248
12.23
6,053
----
20
NRCS Runoff
POND-01A
7.405
12.35
38,906
----
21
NRCS Runoff
INF-01B
3.384
12.08
10,980
----
22
NRCS Runoff
PR-02A
0.809
12.25
4,077
----
23
NRCS Runoff
POND-02A
6.330
12.28
30,558
----
24
NRCS Runoff
PR-03A
0.783
12.32
4,174
----
25
NRCS Runoff
POND-03A
1.728
12.12
5,923
----
26
NRCS Runoff
INF-03A
2.768
12.18
11,757
----
27
NRCS Runoff
PR-03B
1.486
12.23
7,258
----
28
NRCS Runoff
POND-03B
4.310
12.20
18,555
----
29
NRCS Runoff
INF-03B
3.204
12.08
10,755
----
30
Pond Route
INF-PR-01B
2.399
12.18
8,338
21
30.83
2,486
31
Pond Route
POND-PR-01A
2.605
12.87
32,813
20
32.23
16,412
32
Junction
SITE-PR-01A
3.889
12.20
47,204
19, 30, 31
33
Pond Route
POND-PR-02A
1.416
12.90
23,050
23
30.21
15,189
34
Pond Route
POND-INF-03A
2.582
12.23
7,152
26
25.07
2,099
35
Junction
POND-03A COMB
3.847
12.20
13,075
25, 34
36
Pond Route
POND-PR-03A1
1.427
12.55
9,430
35
22.71
5,130
8

Hydrograph 10-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
37
Pond Route
POND-INF-03B
1.978
12.18
5,326
29
24.70
2,769
38
Junction
POND-03B COMB
6.276
12.20
23,880
28, 37
39
Pond Route
POND-PR-03B1
1.571
12.78
16,048
38
19.34
9,346
40
Junction
SITE-PR-02A
1.624
12.87
27,127
22, 33
41
Junction
SITE-PR-03A1
2.061
12.47
13,604
24, 36
42
Junction
SITE-PR-03B1
2.332
12.42
23,306
27, 39
43
Junction
SITE-PR-03A
4.382
12.45
36,910
41, 42
44
Junction
SITE-PR-DET-A
8.914
12.63
111,242
32, 40, 43
9

Hydrograph 25-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
1
NRCS Runoff
EX-01
47.38
12.52
305,899
----
2
NRCS Runoff
PR-01
57.79
12.48
355,425
----
3
NRCS Runoff
SITE-EX-01
8.632
12.43
50,903
----
4
NRCS Runoff
SITE-EX-02
2.519
12.42
14,640
----
5
NRCS Runoff
SITE-EX-03
6.830
12.42
39,689
----
6
Junction
SITE-EX
17.98
12.42
105,232
3, 4, 5
7
NRCS Runoff
SITE-PR-01
14.45
12.35
75,721
----
8
NRCS Runoff
SITE-PR-02
9.530
12.28
46,072
----
9
NRCS Runoff
SITE-PR-03B
8.999
12.30
43,955
----
10
NRCS Runoff
SITE-PR-03A
6.224
12.25
28,507
----
11
Junction
SITE-PR-03
15.14
12.28
72,462
9, 10
12
Junction
SITE-PR
38.74
12.30
194,255
7, 8, 11
13
Pond Route
POND-PR-01
6.874
12.77
69,011
7
33.61
28,481
14
Pond Route
POND-PR-02
3.227
12.75
38,240
8
30.79
19,764
15
Pond Route
POND-PR-03A
4.050
12.50
23,840
10
23.61
8,276
16
Pond Route
POND-PR-03B
4.199
12.67
34,612
9
20.08
14,417
17
Junction
POND-PR-03
8.136
12.53
58,451
15, 16
18
Junction
SITE-PR-DET
17.16
12.73
165,702
13, 14, 17
19
NRCS Runoff
PR-01A
2.063
12.22
9,286
----
20
NRCS Runoff
POND-01A
10.09
12.35
52,736
----
21
NRCS Runoff
INF-01B
4.346
12.08
14,211
----
22
NRCS Runoff
PR-02A
1.352
12.23
6,290
----
23
NRCS Runoff
POND-02A
8.342
12.28
40,362
----
24
NRCS Runoff
PR-03A
1.285
12.28
6,389
----
25
NRCS Runoff
POND-03A
2.329
12.12
7,974
----
26
NRCS Runoff
INF-03A
3.457
12.18
14,853
----
27
NRCS Runoff
PR-03B
2.472
12.22
11,167
----
28
NRCS Runoff
POND-03B
6.283
12.20
26,416
----
29
NRCS Runoff
INF-03B
3.971
12.08
13,496
----
30
Pond Route
INF-PR-01B
3.112
12.17
11,409
21
31.28
2,869
31
Pond Route
POND-PR-01A
3.890
12.82
46,346
20
32.83
21,355
32
Junction
SITE-PR-01A
5.889
12.38
67,040
19, 30, 31
33
Pond Route
POND-PR-02A
2.855
12.73
32,584
23
30.63
18,517
34
Pond Route
POND-INF-03A
3.338
12.20
9,809
26
25.17
2,156
35
Junction
POND-03A COMB
5.320
12.17
17,782
25, 34
36
Pond Route
POND-PR-03A1
2.080
12.50
13,815
35
23.17
6,650
10

Hydrograph 25-yr Summary
Project Name: Waterford Woods
Hydrology Studio v 3.0.0.21
02-17-2022
Hyd.
No.
Hydrograph
Type
Hydrograph
Name
Peak
Flow
(cfs)
Time to
Peak
(hrs)
Hydrograph
Volume
(cuft)
Inflow
Hyd(s)
Maximum
Elevation
(ft)
Maximum
Storage
(cuft)
37
Pond Route
POND-INF-03B
3.419
12.13
7,501
29
24.88
2,926
38
Junction
POND-03B COMB
9.356
12.17
33,917
28, 37
39
Pond Route
POND-PR-03B1
3.286
12.58
25,452
38
19.79
12,347
40
Junction
SITE-PR-02A
3.342
12.62
38,874
22, 33
41
Junction
SITE-PR-03A1
3.217
12.38
20,203
24, 36
42
Junction
SITE-PR-03B1
4.5