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Home My WebLink About23SITE8-669Rte163-Stormwater Report June 2023 VCP Montville LF, LLC Town of Montville Landfill Solar PV Development 669 Oakdale Road (CT RT 163) Montville, CT 06353 Stormwater Report Weston & Sampson Engineers, Inc. 712 Brook Street, Suite 103 Rocky Hill, CT 06067 tel. 860.513.1473 STORMWATER REPORT VCP Montville LF, LLC TABLE OF CONTENTS Stormwater Report Attachment A - Locus Map Attachment B - NRCS Web Soil Survey Map & Report: Hydrologic Soils Group, FEMA FIRMette, NOAA Atlas 14 Rainfall Data Attachment C - Drainage Area Maps & HydroCAD Report Page 1 of 4 westonandsampson.com STORMWATER REPORT VCP Montville LF, LLC Applicant/Project Name: VCF Montville LF, LLC Town of Montville Landfill Solar PV Development Project Location: 669 Oakdale Road (CT RT 163), Montville, CT 06353 Application Prepared by: Firm: Weston & Sampson Engineers, Inc. Registered PE: Rob Bukowski, P.E. Introduction Weston & Sampson Engineers, Inc. (Weston & Sampson) has prepared this stormwater report on behalf of VCP Montville LF, LLC (Verogy) to develop a ground mounted solar photovoltaic (PV) array at the closed landfill, located at 669 Oakdale Road (CT RT 163) in Montville, Connecticut. The existing Town of Montville Landfill covers an area of approximately 8-acres within a property that is approximately 25.5 acres. The site is currently used as a transfer station and is bounded by Oakdale Road (CT RT 163) to the south, the Fox Family Cemetery to the west, Fox Brook and Oxoboxo Brook to the north, and Wheeler Pond to the east. The capped landfill slopes to all sides at an approximate 30% slope with an un-maintained meadow/brush ground cover. The top of the existing landfill is currently being used as sand/gravel stockpile storage. The landfill is in the southwest section of the property and the transfer station is in the southeast section of the property. The southern entrance and transfer station areas are covered by pavement and broken bituminous asphalt. There is an existing unpaved access road leading from the southern entrance, traversing the landfill cap counterclockwise, which culminates atop the landfill cap. Wetland delineations performed determined three existing wetlands are onsite. The first is a bordering vegetated wetland north of the landfill and associated with Fox Brook. The second is an isolated vegetated wetland to the southwest of the landfill associated with a low point past the toe of the slope of the landfill and crosses the property line. The third is a bordering vegetated wetland in the southeast corner of the site associated with a natural drainage path draining easterly towards Wheeler Pond. The proposed project will have minimum impact within the 50-foot upland review area adjacent to on-Site wetlands, with only two small areas of the proposed project within the outermost edges of the upland review area. Stabilization and maintenance of the existing access road, if necessary, will occur within approximately 386 square feet of the upland review area on the western side of the site. Subsurface electrical conduit will run from the eastern side of the access road to above-ground utility poles. There is an area of approximately 531 square feet within the upland review area where the proposed trench will pass through. This disturbance will be temporary as, once the conduit is installed, the area will be stabilized and re-vegetated. No part of the project area is within a Federal Emergency Management Agency National Flood Hazard Zone. A Zone-A Flood Hazard Zone is associated with Fox Brook to the north of the project area. Proposed Project The proposed project includes deploying ground-mounted solar on the existing landfill cap. The total capacity of the proposed ground mounted solar installation is approximately 776 kilowatt (kW) direct current (DC) (600 kW alternating current (AC)). The on-cap solar PV array is to be supported on precast concrete ballasted foundations and will have a low bearing pressure that is designed to maintain the integrity of the existing engineered landfill cap. Each block will be placed on dense-graded crushed stone to level the blocks to meet the foundation manufacturer’s requirements. Panel racking will be installed above the precast concrete ballasted foundations and solar PV Page 2 of 4 westonandsampson.com STORMWATER REPORT VCP Montville LF, LLC modules will be attached to the racking. The series of PV panels will be connected using above ground cables, cable trays, and conduits that bring the wiring to a central equipment pad located atop the landfill cap directly east of the solar PV array. A chain link fence is proposed atop the landfill cap to provide security and separation of any unqualified personnel from any electrical conductors, as required by the National Electric Code. The total area of the array within the fence limits is approximately 2.4 acres. The proposed fence will be supported on ballast blocks as opposed to ground-driven poles to protect the existing engineered landfill cap. A Locus Map of the project location is included as Figure 1 in Attachment A. Erosion and Sediment Control The erosion and sediment controls have been designed in accordance with the 2002 Connecticut Guidelines for Soil Erosion and Sediment Control. Straw wattle is proposed as the sediment barrier for perimeter controls. When used on the cap, sandbags will be used to weigh the straw wattle down if needed. Any piercing activities such as driving stakes in the ground to keep straw wattle in place is prohibited while on the landfill cap to not damage the cap. A construction entrance/exit is proposed where the existing access road meets the paved area south of the landfill. A concrete washout basin is proposed near the construction entrance/exit. Stormwater Analysis Stormwater runoff patterns for the Town of Montville Landfill will not be altered as part of the proposed project. Existing and proposed peak design flows were assessed using the National Resources Conservation Service (NRCS) Technical Release 20 (TR-20) methodology. HydroCAD® version 10.20-2d stormwater modeling software was used to analyze stormwater conditions. It is a comprehensive hydrodynamic modeling program which analyzes and designs site hydrology, surface drainage systems, and storm drains. It can manage a variety of flow situations such as overland flow, drainage swales, ponds, and piping systems. The National Resources Conservation Service (NRCS) Web Soil Survey database was used to determine the hydrologic soil group (HSG) for the onsite soils. Stormwater rainfall event data is derived from the National Oceanic and Atmospheric Administration (NOAA) Atlas 14 Precipitation Frequency data for the site. The 2-, 10-, 25-, and 100- year, 24-hour, Type-III storm events were used to compare post-development conditions to pre-development conditions. The NRCS report and NOAA data are included in Attachment B. A summary of the analysis is provided below, the full stormwater model and drainage area maps are included in Attachment C. Existing Stormwater Flow The Town of Montville Landfill does not have an existing stormwater management system and stormwater currently flows off the landfill cap in all directions via overland flow. The limits of the stormwater analysis for this project include the landfill cap, the southern paved area, the majority of the eastern transfer station area, and the northern meadow/woodlands between the landfill cap and Fox Brook. HSG-A, B, C and D soils are all determined to be onsite, and coverages were accounted for accordingly based on HSG soil boundaries. Pre-development conditions have been modeled assuming the landfill cap has been maintained as it was designed with meadow coverage. HSG-D soils are assumed to be consistent with the landfill limit of waste which is assumed to extend to the landfill toe of slope. Page 3 of 4 westonandsampson.com STORMWATER REPORT VCP Montville LF, LLC Four points of analysis, each with their own drainage area, were analyzed. Figure 2 of Attachment C displays the limits of each drainage area, flow paths, and existing ground covers. A description of each drainage area is below: • Drainage Area A – Northern portion of the landfill draining northerly towards Fox Brook, • Drainage Area B – Southwest portion of the landfill draining southwesterly offsite, • Drainage Area C – Southern portion of the landfill draining southeasterly offsite, • Drainage Area D – Eastern portion of the landfill draining easterly offsite towards Wheeler Pond Proposed Stormwater Flow The stormwater analysis assumes the array concrete ballast blocks and equipment pad will be considered disconnected impervious area in the post-development stormwater model. Figure 3 of Attachment C displays the limits of each drainage area, flow paths, and proposed ground covers. The dimensions of the ballast blocks are assumed to be 2.5-ft wide by 9-ft long. Two ballast blocks will be used for each table with each table consisting of approximately 16 solar PV modules. Stormwater flow patterns do not change based on the proposed solar PV layout as there are no proposed grading changes. Post-development drainage areas are denoted with a suffix of “1” and are consistent with pre-development drainage areas. The post-development coverage conditions remain consistent with the pre-development conditions for the majority of the site. The only difference being minor trimming to the woods coverage in the northeast corner of the site, and the addition of the concrete ballast blocks and gravel turnaround areas as unconnected impervious coverage. These changes do not change the overall runoff curve numbers (CN) of the drainage areas. The time of concentrations (Tc) are consistent from pre- to post- development conditions. All Tcs begin with 100-feet of sheet flow followed by shallow concentrated flow until flow reaches the drainage area boundary. Peak Discharge Summary As the overall CN and Tc for each drainage area remain consistent from pre- to post-development conditions, the project results in no changes in peak runoff discharge rate or volume for all design storms. The pre- and post-development conditions comparative table reflecting the HydroCAD results are shown in Table 1 below. The project considers the following as impervious coverage: the existing access road, the existing paved areas, the existing broken bituminous areas, the proposed gravel turnaround area atop the landfill, the proposed concrete ballast blocks for the array, and the proposed concrete equipment pad. Page 4 of 4 westonandsampson.com STORMWATER REPORT VCP Montville LF, LLC 2 7.73 7.73 0.00 0.610 0.610 0.000 10 15.14 15.14 0.00 1.177 1.177 0.000 25 20.05 20.05 0.00 1.560 1.560 0.000 100 27.70 27.70 0.00 2.170 2.170 0.000 2 0.47 0.47 0.00 0.040 0.040 0.000 10 0.91 0.91 0.00 0.075 0.075 0.000 25 1.20 1.20 0.00 0.100 0.100 0.000 100 1.65 1.65 0.00 0.138 0.138 0.000 2 2.14 2.14 0.00 0.215 0.215 0.000 10 4.20 4.20 0.00 0.415 0.415 0.000 25 5.57 5.57 0.00 0.550 0.550 0.000 100 7.70 7.70 0.00 0.765 0.765 0.000 2 6.67 6.67 0.00 0.607 0.607 0.000 10 12.20 12.20 0.00 1.111 1.111 0.000 25 15.78 15.78 0.00 1.444 1.444 0.000 100 21.29 21.29 0.00 1.968 1.968 0.000 POA-D Offsite - East POA-A Northern Wetland Point of Analysis 24-hour Storm Event Pre-Development Receiving Peak Runoff (cfs) Post-Development Recieving Peak Runoff (cfs) Difference in Peak Runoff (cfs) Pre-Development Receiving Discharge Volume (af) Post-Development Recieving Discharge Volume (af) Difference in Volume (af) TABLE 1: PRE-, POST-DEVELOPMENT COMPARATIVE RESULTS POA-B Offsite - West POA-C Southeast Wetland OFF-SITE SUMMARY FLOW VOLUME Conclusion The proposed solar PV array located at the Town of Montville Landfill will include minor vegetation trimming within the array area, minor access road improvements, and the implementation of erosion and sediment controls. The analysis shows no change in peak discharge runoff rates for post-development conditions compared to pre-development conditions. No stormwater management system is proposed as there is no increase in stormwater runoff rate or volume. Similarly, water quality volume calculations and treatment per the 2004 Connecticut Stormwater Quality Manual are not provided for this project. . Attachment A - Locus Map Attachment B - NRCS Web Soil Survey Map & Report: Hydrologic Soils Group, FEMA FIRMette, NOAA Atlas 14 Rainfall Data Hydrologic Soil Group—State of Connecticut Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/18/2023 Page 1 of 445940304594090459415045942104594270459433045943904594030459409045941504594210459427045943304594390737260737320737380737440737500737560737620737680737740737800737860 737260 737320 737380 737440 737500 737560 737620 737680 737740 737800 737860 41° 27' 58'' N 72° 9' 33'' W41° 27' 58'' N72° 9' 5'' W41° 27' 44'' N 72° 9' 33'' W41° 27' 44'' N 72° 9' 5'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 18N WGS84 0 100 200 400 600 Feet 0 40 80 160 240 Meters Map Scale: 1:2,940 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:12,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: State of Connecticut Survey Area Data: Version 22, Sep 12, 2022 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 14, 2022—Oct 6, 2022 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Hydrologic Soil Group—State of Connecticut Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/18/2023 Page 2 of 4 Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 38C Hinckley loamy sand, 3 to 15 percent slopes A 0.9 3.5% 38E Hinckley loamy sand, 15 to 45 percent slopes A 3.6 14.0% 62C Canton and Charlton fine sandy loams, 3 to 15 percent slopes, extremely stony B 0.1 0.4% 102 Pootatuck fine sandy loam B 0.3 1.1% 302 Dumps 8.9 34.9% 701A Ninigret fine sandy loam, 0 to 3 percent slopes C 0.7 2.8% 702A Tisbury silt loam, 0 to 3 percent slopes C 7.9 31.1% 703A Haven silt loam, 0 to 3 percent slopes B 2.2 8.8% W Water 0.8 3.3% Totals for Area of Interest 25.4 100.0% Hydrologic Soil Group—State of Connecticut Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/18/2023 Page 3 of 4 Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—State of Connecticut Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/18/2023 Page 4 of 4 National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250 Feet Ü SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOODHAZARD AREAS Without Base Flood Elevation (BFE)Zone A, V, A99With BFE or DepthZone AE, AO, AH, VE, AR Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areasof 1% annual chance flood with averagedepth less than one foot or with drainageareas of less than one square mileZone X Future Conditions 1% Annual Chance Flood HazardZone X Area with Reduced Flood Risk due to Levee. See Notes.Zone X Area with Flood Risk due to LeveeZone D NO SCREENArea of Minimal Flood Hazard Zone X Area of Undetermined Flood HazardZone D Channel, Culvert, or Storm Sewer Levee, Dike, or Floodwall Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation Coastal Transect Coastal Transect Baseline Profile Baseline Hydrographic Feature Base Flood Elevation Line (BFE) Effective LOMRs Limit of Study Jurisdiction Boundary Digital Data Available No Digital Data Available Unmapped This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below.The basemap shown complies with FEMA's basemapaccuracy standards The flood hazard information is derived directly from theauthoritative NFHL web services provided by FEMA. This mapwas exported on 4/26/2023 at 1:02 PM and does notreflect changes or amendments subsequent to this date andtime. The NFHL and effective information may change orbecome superseded by new data over time. This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for regulatory purposes. Legend OTHER AREAS OF FLOOD HAZARD OTHER AREAS GENERAL STRUCTURES OTHER FEATURES MAP PANELS 8 B 20.2 The pin displayed on the map is an approximatepoint selected by the user and does not representan authoritative property location. 1:6,000 72°9'43"W 41°28'3"N 72°9'5"W 41°27'36"N Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020 Attachment C - Drainage Area Maps & HydroCAD Reports EXISTING LEGEND: LOCUS PROPERTY LINE ABUTTERS PROPERTY LINE EASEMENT LINE 2' CONTOUR LINE CHAIN LINK FENCE TREE LINE FEMA FLOOD ZONE LINE ZONING LINE OVERHEAD WIRES BURIED GAS LINE CONC. BOUND FOUND CALCULATED POINT UTILITY POLE LIGHT POLE GUY WIRE ANCHOR CATCH BASIN MANHOLE WETLAND FLAG WITH IDENTIFIER SIGN POST BURIED DRAINAGE LINE GAS VALVE CONCRETE PAD GRAVEL PAVEMENT STRUCTURE WETLAND LINE 50' UPLAND REVIEW AREA TREE LINE SAND AND GRAVEL FEMA Z O N E X FEMA Z O N E A FEMA Z O N E X FEMA Z O N E A FEMA ZONE XFEMA ZONE X(SHADED)FEMA ZONE X FEMA ZONE A ZONE:GOVZONE:OSZON E: R 4 0 ZON E: G O V ZON E : G O V ZON E : R 2 0 - M ZO N E :GOV ZON E :R 1 2 0 CHES T E R F I E L D R O A D ROU T E 1 6 3 702A 703A 702A 302 38C62C 701A 38E > > > > > > > >>>>> > > > > > > > > >>>>>>>>A B C D POA-A POA-B POA-C POA-D \\wse03.local\WSE\Projects\Private\Verogy Solar\Montville, CT Landfill\Design\CAD\03 Sheets\Drainage Area Maps.dwgWESTON & SAMPSON ENGINEERS, INC. 712 BROOK STREET, SUITE 103 ROCKY HILL, CT 06067 860.513.1473 800.SAMPSON COPYRIGHT © 2023 WESTON & SAMPSON, INC. Project: www.westonandsampson.com Applicant: Seal: Revisions: Issued For: Drawing Title: Sheet Number: Scale: W&S File No.: W&S Project No.: Approved By: Date Created: Reviewed By: Drawn By: TOWN OF MONTVILLE LANDFILL SOLAR PV DEVELOPMENT 669 ROUTE 163 MONTVILLE, CT 06353 0 VCP MONTVILLE LF, LLC 150 TRUMBULL STREET 4TH FLOOR HARTFORD, CT 06103 TEL: (860) 288-7215 WWW.VEROGY.COM PERMITTING Verogy Montville ENG23-1066 AS SHOWN RJB 06/06/2023 MRC NVG 06/06/2023 ISSUED FOR PERMITTING No.Date Description NOT FOR CONSTRUCTION NOTES: 1.BASEMAPPING DERIVED FROM SURVEY PROVIDED BY NORTHEAST SURVEY CONSULTANTS ENTITILED "PLAN OF LAND IN MONTVILLE, CT, 669 ROUTE 163, PREPARED FOR VEROGY" AND DATED 4-4-2023. 2.SOIL DATA PROVIDED BY NATIONAL RESOURCE CONSERVATION SERVICE (NRCS) WEB SOIL SURVEY. 3.SOIL GEOGRAPHIC INFORMATION SYSTEM (GIS) DATA DERIVED FROM CONNECTICUT DEPARTMENT OF ENERGY & ENVIRONMENTAL PROTECTION GIS OPEN DATA WEBSITE SOIL SURVEY GEOGRAPHIC DATABASE SOILS (SSURGO). 4.HYDROLOGIC SOIL GROUP (HSG) D SOILS ASSUMED TO BE WITHIN THE FOOTPRINT OF THE LIMIT OF WASTE WHICH IS ASSUMED TO EXTEND TO LANDFILL TOE OF SLOPE. FIG 2 PRE- DEVELOPMENT DRAINAGE AREA MAP LEGEND DRAINAGE AREA MAP: WOODLAND IMPERVIOUS MEADOW WATERSHED BOUNDARY HYDROLOGIC SOIL GROUP A XP FLOW PATH / TIME OF CONCENTRATION SUBBASIN LABEL POINT OF ANALYSIS BASIN BMP 922B NRCS SOIL BOUNDARY NRCS SOIL MAP UNIT HYDROLOGY: GRAVEL XL X# HYDROLOGIC SOIL GROUP B HYDROLOGIC SOIL GROUP C HYDROLOGIC SOIL GROUP D Soil Data MaS 8Qit S\PEol MaS 8Qit NaPH +S* RatiQJ C +iQFNlH\ loaP\ VaQG to SHUFHQt VloSHV $ E +iQFNlH\ loaP\ VaQG to SHUFHQt VloSHV $ C CaQtoQ aQG CKaUltoQ IiQH VaQG\ loaPV to SHUFHQt VloSHV H[tUHPHl\ VtoQ\ % DXPSV D $ NiQiJUHt IiQH VaQG\ loaP to SHUFHQt VloSHV C $TiVEXU\ Vilt loaP to SHUFHQt VloSHV C PRE-DEVELOPMENT TC LIST DUaiQaJH $UHa )loZ T\SH *UoXQG CoYHU LHQJtK ItSloSH $ S+EET ME$DO: SC)ME$DO: SC)*R$VEL SC)ME$DO: SC):OODS % S+EET ME$DO: SC)ME$DO: SC)ME$DO: SC)*R$VEL SC)ME$DO: C S+EET ME$DO: SC)ME$DO: SC)ME$DO: SC)P$VEMENT SC)ME$DO: SC):OODS D S+EET ME$DO: SC)ME$DO: SC)ME$DO: SC)P$VEMENT SC)*R$VEL 50' UPLAND REVIEW AREA ASSUMED HSG-D SOIL BOUNDARY EXISTING LEGEND: LOCUS PROPERTY LINE ABUTTERS PROPERTY LINE EASEMENT LINE 2' CONTOUR LINE CHAIN LINK FENCE TREE LINE FEMA FLOOD ZONE LINE ZONING LINE OVERHEAD WIRES BURIED GAS LINE CONC. BOUND FOUND CALCULATED POINT UTILITY POLE LIGHT POLE GUY WIRE ANCHOR CATCH BASIN MANHOLE WETLAND FLAG WITH IDENTIFIER SIGN POST BURIED DRAINAGE LINE GAS VALVE CONCRETE PAD GRAVEL PAVEMENT STRUCTURE WETLAND LINE 50' UPLAND REVIEW AREA TREE LINE SAND AND GRAVEL PROPOSED LEGEND: LIMIT OF WORK SEDIMENT BARRIER LOW LOW SB SB SB SB FENCEXXX ELECTRIC CONDUITECEC OVERHEAD ELECTRICOHEOHE SOLAR PV RACK UTILITY POLE 5 C-502 3 C-501 2 C-502 ACCESS ROAD 4 C-502 FEMA Z O N E X FEMA Z O N E A FEMA Z O N E X FEMA Z O N E A FEMA ZONE XFEMA ZONE X(SHADED)FEMA ZONE X FEMA ZONE A ZONE:GOVZONE:OSZON E: R 4 0 ZON E: G O V ZON E : G O V ZON E : R 2 0 - M ZO N E :GOV ZON E :R 1 2 0 CHES T E R F I E L D R O A D ROU T E 1 6 3 CONSTRUCTION ENTRANCEXXXX X X X X X X X X X X X X XX X X X X X XXXXXXXXXXXXXXXXXXXXXXXXXOHEOHESB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SBSB SBSBSB SB SB SB SB SB SBSBSBSBSBSBSBSB SB SB SB SB SB SB SB SB SB SB S B S BSBSBSB SBSBSBSB SB SB SB SB SB SB E C E C E CECECECECECEC LOWLOWLO W L O W L O WLOWLOWLOWLOWLOWLOWLOW LOW LOW LOWLOWLOW LOW LOW LOW LOW LOW LO W LO W LO WLOWLOWLOWLOW LOW LOW LOW LOW LOW LO W LO W LO W LO W LO W LO W LO W LO W LO W LO W LOW LOW LOW LOW LOW LOW LOW LOW LOWLOWLOWLOW LOW L OW LO W LOW LOW LO WLOW L O W LOW LOW LOWLOWLOWLOW LOW LOW LOW LOW LOW LOW LOWLOW LOW LO W LO W LO W LO W LO W LO W L O W LO W L O W LO W L O W LOWLOWLOW LOWLOWLOWLOWLOWL O W L O W LO W LO W LOWLOWPROPOSED EQUIPMENT PAD PROPOSED GATE CONCRETE WASHOUT BASIN 702A 703A 702A 302 38C62C 701A 38E > > > > > > > >>>>> > > > > > > > > >>>>>>>>A1 B1 C1 D1 POA-A POA-B POA-C POA-D \\wse03.local\WSE\Projects\Private\Verogy Solar\Montville, CT Landfill\Design\CAD\03 Sheets\Drainage Area Maps.dwgWESTON & SAMPSON ENGINEERS, INC. 712 BROOK STREET, SUITE 103 ROCKY HILL, CT 06067 860.513.1473 800.SAMPSON COPYRIGHT © 2023 WESTON & SAMPSON, INC. Project: www.westonandsampson.com Applicant: Seal: Revisions: Issued For: Drawing Title: Sheet Number: Scale: W&S File No.: W&S Project No.: Approved By: Date Created: Reviewed By: Drawn By: TOWN OF MONTVILLE LANDFILL SOLAR PV DEVELOPMENT 669 ROUTE 163 MONTVILLE, CT 06353 0 VCP MONTVILLE LF, LLC 150 TRUMBULL STREET 4TH FLOOR HARTFORD, CT 06103 TEL: (860) 288-7215 WWW.VEROGY.COM PERMITTING Verogy Montville ENG23-1066 AS SHOWN RJB 06/06/2023 MRC NVG 06/06/2023 ISSUED FOR PERMITTING No.Date Description NOT FOR CONSTRUCTION FIG 3 POST- DEVELOPMENT DRAINAGE AREA MAP LEGEND DRAINAGE AREA MAP: WOODLAND IMPERVIOUS MEADOW WATERSHED BOUNDARY HYDROLOGIC SOIL GROUP A XP FLOW PATH / TIME OF CONCENTRATION SUBBASIN LABEL POINT OF ANALYSIS BASIN BMP 922B NRCS SOIL BOUNDARY NRCS SOIL MAP UNIT HYDROLOGY: GRAVEL XL X# HYDROLOGIC SOIL GROUP B HYDROLOGIC SOIL GROUP C HYDROLOGIC SOIL GROUP D Soil Data MaS 8Qit S\PEol MaS 8Qit NaPH +S* 5atiQJ C +iQFNlH\ loaP\ VaQG to SHUFHQt VloSHV $ E +iQFNlH\ loaP\ VaQG to SHUFHQt VloSHV $ C CaQtoQ aQG CKaUltoQ IiQH VaQG\ loaPV to SHUFHQt VloSHV H[tUHPHl\ VtoQ\ % DXPSV D $ NiQiJUHt IiQH VaQG\ loaP to SHUFHQt VloSHV C $TiVEXU\ Vilt loaP to SHUFHQt VloSHV C POST-DEVELOPMENT TC LIST DUaiQaJH $UHa )loZ T\SH *UoXQG CoYHU LHQJtK ItSloSH $ S+EET ME$DO: SC)ME$DO: SC)*5$VEL SC)ME$DO: SC):OODS % S+EET ME$DO: SC)ME$DO: SC)ME$DO: SC)*5$VEL SC)ME$DO: C S+EET ME$DO: SC)ME$DO: SC)ME$DO: SC)P$VEMENT SC)ME$DO: SC):OODS D S+EET ME$DO: SC)ME$DO: SC)ME$DO: SC)P$VEMENT SC)*5$VEL NRCS SOIL MAP UNIT 50' UPLAND REVIEW AREA ASSUMED HSG-D SOIL BOUNDARY NOTES: 1.BASEMAPPING DERIVED FROM SURVEY PROVIDED BY NORTHEAST SURVEY CONSULTANTS ENTITILED "PLAN OF LAND IN MONTVILLE, CT, 669 ROUTE 163, PREPARED FOR VEROGY" AND DATED 4-4-2023. 2.SOIL DATA PROVIDED BY NATIONAL RESOURCE CONSERVATION SERVICE (NRCS) WEB SOIL SURVEY. 3.SOIL GEOGRAPHIC INFORMATION SYSTEM (GIS) DATA DERIVED FROM CONNECTICUT DEPARTMENT OF ENERGY & ENVIRONMENTAL PROTECTION GIS OPEN DATA WEBSITE SOIL SURVEY GEOGRAPHIC DATABASE SOILS (SSURGO). 4.HYDROLOGIC SOIL GROUP (HSG) D SOILS ASSUMED TO BE WITHIN THE FOOTPRINT OF THE LIMIT OF WASTE WHICH IS ASSUMED TO EXTEND TO LANDFILL TOE OF SLOPE. ABCDPOA-APOA-BPOA-CPOA-DRouting Diagram for 669 Oakdale Road Montville - PrePrepared by Weston & Sampson Engineers, Inc, Printed 6/12/2023HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatReachPondLink669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 2HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCRainfall Events ListingEvent# EventNameStorm Type Curve Mode Duration(hours)B/B Depth(inches)AMC1 2-yr Type III 24-hr Default 24.00 1 3.45 22 10-yr Type III 24-hr Default 24.00 1 5.12 23 25-yr Type III 24-hr Default 24.00 1 6.17 24 100-yr Type III 24-hr Default 24.00 1 7.78 2 669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 3HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCArea Listing (all nodes)Area(acres)CN Description(subcatchment-numbers)0.231 76 Gravel roads, HSG A (D)0.043 89 Gravel roads, HSG C (A, D)0.432 91 Gravel roads, HSG D (A, B, C, D)0.229 30 Meadow, non-grazed, HSG A (A, C, D)0.114 71 Meadow, non-grazed, HSG C (A, C, D)5.644 78 Meadow, non-grazed, HSG D (A, B, C, D)0.357 98 Paved parking, HSG A (C, D)0.014 98 Paved parking, HSG B (C)0.008 98 Paved parking, HSG C (D)0.819 98 Paved parking, HSG D (C, D)0.023 36 Woods, Fair, HSG A (A, C)0.842 73 Woods, Fair, HSG C (A, C)2.528 79 Woods, Fair, HSG D (A, C, D)11.283 79 TOTAL AREAType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 4HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A: Runoff = 7.73 cfs @ 12.12 hrs, Volume= 0.610 af, Depth= 1.46" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Description13,906 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A66,841 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C92,438 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A6,666 91 Gravel roads, HSG D953 89 Gravel roads, HSG C218,623 78 Weighted Average218,623 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 Total Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 5HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment A: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Type III 24-hr2-yr Rainfall=3.45"Runoff Area=218,623 sfRunoff Volume=0.610 afRunoff Depth=1.46"Flow Length=308'Tc=8.2 minCN=787.73 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 6HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B: Runoff = 0.47 cfs @ 12.15 hrs, Volume= 0.040 af, Depth= 1.53" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Description3,577 78 Meadow, non-grazed, HSG D8,878 78 Meadow, non-grazed, HSG D1,122 91 Gravel roads, HSG D13,577 79 Weighted Average13,577 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 7HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)0.50.450.40.350.30.250.20.150.10.050Type III 24-hr2-yr Rainfall=3.45"Runoff Area=13,577 sfRunoff Volume=0.040 afRunoff Depth=1.53"Flow Length=254'Tc=10.2 minCN=790.47 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 8HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C: Runoff = 2.14 cfs @ 12.24 hrs, Volume= 0.215 af, Depth= 1.46" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Description13,937 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A18,914 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,453 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A77,099 78 Weighted Average55,923 72.53% Pervious Area21,176 27.47% Impervious Area Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 9HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)210Type III 24-hr2-yr Rainfall=3.45"Runoff Area=77,099 sfRunoff Volume=0.215 afRunoff Depth=1.46"Flow Length=1,001'Tc=16.8 minCN=782.14 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 10HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D: Runoff = 6.67 cfs @ 12.19 hrs, Volume= 0.607 af, Depth= 1.74" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Description38,983 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A80,797 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C10,224 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,558 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,271 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A182,194 82 Weighted Average151,197 82.99% Pervious Area30,997 17.01% Impervious Area Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 11HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)76543210Type III 24-hr2-yr Rainfall=3.45"Runoff Area=182,194 sfRunoff Volume=0.607 afRunoff Depth=1.74"Flow Length=965'Tc=13.4 minCN=826.67 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 12HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.00% Impervious, Inflow Depth = 1.46" for 2-yr eventInflow = 7.73 cfs @ 12.12 hrs, Volume= 0.610 afPrimary = 7.73 cfs @ 12.12 hrs, Volume= 0.610 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Inflow Area=5.019 ac7.73 cfs7.73 cfs Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 13HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.00% Impervious, Inflow Depth = 1.53" for 2-yr eventInflow = 0.47 cfs @ 12.15 hrs, Volume= 0.040 afPrimary = 0.47 cfs @ 12.15 hrs, Volume= 0.040 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)0.50.450.40.350.30.250.20.150.10.050Inflow Area=0.312 ac0.47 cfs0.47 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 14HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 27.47% Impervious, Inflow Depth = 1.46" for 2-yr eventInflow = 2.14 cfs @ 12.24 hrs, Volume= 0.215 afPrimary = 2.14 cfs @ 12.24 hrs, Volume= 0.215 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)210Inflow Area=1.770 ac2.14 cfs2.14 cfs Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 15HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 17.01% Impervious, Inflow Depth = 1.74" for 2-yr eventInflow = 6.67 cfs @ 12.19 hrs, Volume= 0.607 afPrimary = 6.67 cfs @ 12.19 hrs, Volume= 0.607 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)76543210Inflow Area=4.183 ac6.67 cfs6.67 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 16HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A: Runoff = 15.14 cfs @ 12.12 hrs, Volume= 1.177 af, Depth= 2.81" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Description13,906 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A66,841 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C92,438 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A6,666 91 Gravel roads, HSG D953 89 Gravel roads, HSG C218,623 78 Weighted Average218,623 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 Total Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 17HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment A: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)161514131211109876543210Type III 24-hr10-yr Rainfall=5.12"Runoff Area=218,623 sfRunoff Volume=1.177 afRunoff Depth=2.81"Flow Length=308'Tc=8.2 minCN=7815.14 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 18HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B: Runoff = 0.91 cfs @ 12.15 hrs, Volume= 0.075 af, Depth= 2.91" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Description3,577 78 Meadow, non-grazed, HSG D8,878 78 Meadow, non-grazed, HSG D1,122 91 Gravel roads, HSG D13,577 79 Weighted Average13,577 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 19HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Type III 24-hr10-yr Rainfall=5.12"Runoff Area=13,577 sfRunoff Volume=0.075 afRunoff Depth=2.91"Flow Length=254'Tc=10.2 minCN=790.91 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 20HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C: Runoff = 4.20 cfs @ 12.23 hrs, Volume= 0.415 af, Depth= 2.81" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Description13,937 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A18,914 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,453 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A77,099 78 Weighted Average55,923 72.53% Pervious Area21,176 27.47% Impervious Area Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 21HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)43210Type III 24-hr10-yr Rainfall=5.12"Runoff Area=77,099 sfRunoff Volume=0.415 afRunoff Depth=2.81"Flow Length=1,001'Tc=16.8 minCN=784.20 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 22HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D: Runoff = 12.20 cfs @ 12.19 hrs, Volume= 1.111 af, Depth= 3.19" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Description38,983 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A80,797 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C10,224 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,558 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,271 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A182,194 82 Weighted Average151,197 82.99% Pervious Area30,997 17.01% Impervious Area Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 23HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)131211109876543210Type III 24-hr10-yr Rainfall=5.12"Runoff Area=182,194 sfRunoff Volume=1.111 afRunoff Depth=3.19"Flow Length=965'Tc=13.4 minCN=8212.20 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 24HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.00% Impervious, Inflow Depth = 2.81" for 10-yr eventInflow = 15.14 cfs @ 12.12 hrs, Volume= 1.177 afPrimary = 15.14 cfs @ 12.12 hrs, Volume= 1.177 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)161514131211109876543210Inflow Area=5.019 ac15.14 cfs15.14 cfs Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 25HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.00% Impervious, Inflow Depth = 2.91" for 10-yr eventInflow = 0.91 cfs @ 12.15 hrs, Volume= 0.075 afPrimary = 0.91 cfs @ 12.15 hrs, Volume= 0.075 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Inflow Area=0.312 ac0.91 cfs0.91 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 26HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 27.47% Impervious, Inflow Depth = 2.81" for 10-yr eventInflow = 4.20 cfs @ 12.23 hrs, Volume= 0.415 afPrimary = 4.20 cfs @ 12.23 hrs, Volume= 0.415 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)43210Inflow Area=1.770 ac4.20 cfs4.20 cfs Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 27HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 17.01% Impervious, Inflow Depth = 3.19" for 10-yr eventInflow = 12.20 cfs @ 12.19 hrs, Volume= 1.111 afPrimary = 12.20 cfs @ 12.19 hrs, Volume= 1.111 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)131211109876543210Inflow Area=4.183 ac12.20 cfs12.20 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 28HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A: Runoff = 20.05 cfs @ 12.12 hrs, Volume= 1.560 af, Depth= 3.73" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Description13,906 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A66,841 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C92,438 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A6,666 91 Gravel roads, HSG D953 89 Gravel roads, HSG C218,623 78 Weighted Average218,623 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 Total Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 29HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment A: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)222120191817161514131211109876543210Type III 24-hr25-yr Rainfall=6.17"Runoff Area=218,623 sfRunoff Volume=1.560 afRunoff Depth=3.73"Flow Length=308'Tc=8.2 minCN=7820.05 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 30HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B: Runoff = 1.20 cfs @ 12.15 hrs, Volume= 0.100 af, Depth= 3.83" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Description3,577 78 Meadow, non-grazed, HSG D8,878 78 Meadow, non-grazed, HSG D1,122 91 Gravel roads, HSG D13,577 79 Weighted Average13,577 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 31HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Type III 24-hr25-yr Rainfall=6.17"Runoff Area=13,577 sfRunoff Volume=0.100 afRunoff Depth=3.83"Flow Length=254'Tc=10.2 minCN=791.20 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 32HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C: Runoff = 5.57 cfs @ 12.23 hrs, Volume= 0.550 af, Depth= 3.73" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Description13,937 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A18,914 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,453 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A77,099 78 Weighted Average55,923 72.53% Pervious Area21,176 27.47% Impervious Area Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 33HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)6543210Type III 24-hr25-yr Rainfall=6.17"Runoff Area=77,099 sfRunoff Volume=0.550 afRunoff Depth=3.73"Flow Length=1,001'Tc=16.8 minCN=785.57 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 34HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D: Runoff = 15.78 cfs @ 12.18 hrs, Volume= 1.444 af, Depth= 4.14" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Description38,983 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A80,797 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C10,224 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,558 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,271 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A182,194 82 Weighted Average151,197 82.99% Pervious Area30,997 17.01% Impervious Area Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 35HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)17161514131211109876543210Type III 24-hr25-yr Rainfall=6.17"Runoff Area=182,194 sfRunoff Volume=1.444 afRunoff Depth=4.14"Flow Length=965'Tc=13.4 minCN=8215.78 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 36HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.00% Impervious, Inflow Depth = 3.73" for 25-yr eventInflow = 20.05 cfs @ 12.12 hrs, Volume= 1.560 afPrimary = 20.05 cfs @ 12.12 hrs, Volume= 1.560 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)222120191817161514131211109876543210Inflow Area=5.019 ac20.05 cfs20.05 cfs Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 37HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.00% Impervious, Inflow Depth = 3.83" for 25-yr eventInflow = 1.20 cfs @ 12.15 hrs, Volume= 0.100 afPrimary = 1.20 cfs @ 12.15 hrs, Volume= 0.100 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Inflow Area=0.312 ac1.20 cfs1.20 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 38HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 27.47% Impervious, Inflow Depth = 3.73" for 25-yr eventInflow = 5.57 cfs @ 12.23 hrs, Volume= 0.550 afPrimary = 5.57 cfs @ 12.23 hrs, Volume= 0.550 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)6543210Inflow Area=1.770 ac5.57 cfs5.57 cfs Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 39HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 17.01% Impervious, Inflow Depth = 4.14" for 25-yr eventInflow = 15.78 cfs @ 12.18 hrs, Volume= 1.444 afPrimary = 15.78 cfs @ 12.18 hrs, Volume= 1.444 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)17161514131211109876543210Inflow Area=4.183 ac15.78 cfs15.78 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 40HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A: Runoff = 27.70 cfs @ 12.12 hrs, Volume= 2.170 af, Depth= 5.19" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Description13,906 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A66,841 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C92,438 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A6,666 91 Gravel roads, HSG D953 89 Gravel roads, HSG C218,623 78 Weighted Average218,623 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 Total Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 41HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment A: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)302826242220181614121086420Type III 24-hr100-yr Rainfall=7.78"Runoff Area=218,623 sfRunoff Volume=2.170 afRunoff Depth=5.19"Flow Length=308'Tc=8.2 minCN=7827.70 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 42HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B: Runoff = 1.65 cfs @ 12.14 hrs, Volume= 0.138 af, Depth> 5.30" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Description3,577 78 Meadow, non-grazed, HSG D8,878 78 Meadow, non-grazed, HSG D1,122 91 Gravel roads, HSG D13,577 79 Weighted Average13,577 100.00% Pervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 43HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Type III 24-hr100-yr Rainfall=7.78"Runoff Area=13,577 sfRunoff Volume=0.138 afRunoff Depth>5.30"Flow Length=254'Tc=10.2 minCN=791.65 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 44HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C: Runoff = 7.70 cfs @ 12.23 hrs, Volume= 0.765 af, Depth= 5.19" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Description13,937 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A18,914 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,453 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A77,099 78 Weighted Average55,923 72.53% Pervious Area21,176 27.47% Impervious Area Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 45HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Type III 24-hr100-yr Rainfall=7.78"Runoff Area=77,099 sfRunoff Volume=0.765 afRunoff Depth=5.19"Flow Length=1,001'Tc=16.8 minCN=787.70 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 46HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D: Runoff = 21.29 cfs @ 12.18 hrs, Volume= 1.968 af, Depth> 5.65" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Description38,983 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A80,797 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C10,224 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,558 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,271 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A182,194 82 Weighted Average151,197 82.99% Pervious Area30,997 17.01% Impervious Area Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 47HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)23222120191817161514131211109876543210Type III 24-hr100-yr Rainfall=7.78"Runoff Area=182,194 sfRunoff Volume=1.968 afRunoff Depth>5.65"Flow Length=965'Tc=13.4 minCN=8221.29 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 48HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.00% Impervious, Inflow Depth = 5.19" for 100-yr eventInflow = 27.70 cfs @ 12.12 hrs, Volume= 2.170 afPrimary = 27.70 cfs @ 12.12 hrs, Volume= 2.170 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)302826242220181614121086420Inflow Area=5.019 ac27.70 cfs27.70 cfs Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 49HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.00% Impervious, Inflow Depth > 5.30" for 100-yr eventInflow = 1.65 cfs @ 12.14 hrs, Volume= 0.138 afPrimary = 1.65 cfs @ 12.14 hrs, Volume= 0.138 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Inflow Area=0.312 ac1.65 cfs1.65 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 50HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 27.47% Impervious, Inflow Depth = 5.19" for 100-yr eventInflow = 7.70 cfs @ 12.23 hrs, Volume= 0.765 afPrimary = 7.70 cfs @ 12.23 hrs, Volume= 0.765 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Inflow Area=1.770 ac7.70 cfs7.70 cfs Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Pre Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 51HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 17.01% Impervious, Inflow Depth > 5.65" for 100-yr eventInflow = 21.29 cfs @ 12.18 hrs, Volume= 1.968 afPrimary = 21.29 cfs @ 12.18 hrs, Volume= 1.968 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)23222120191817161514131211109876543210Inflow Area=4.183 ac21.29 cfs21.29 cfs A1B1C1D1POA-APOA-BPOA-CPOA-DRouting Diagram for 669 Oakdale Road Montville - PostPrepared by Weston & Sampson Engineers, Inc, Printed 6/12/2023HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatReachPondLink669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 2HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCRainfall Events ListingEvent# EventNameStorm Type Curve Mode Duration(hours)B/B Depth(inches)AMC1 2-yr Type III 24-hr Default 24.00 1 3.45 22 10-yr Type III 24-hr Default 24.00 1 5.12 23 25-yr Type III 24-hr Default 24.00 1 6.17 24 100-yr Type III 24-hr Default 24.00 1 7.78 2 669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 3HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCArea Listing (all nodes)Area(acres)CN Description(subcatchment-numbers)0.231 76 Gravel roads, HSG A (D1)0.043 89 Gravel roads, HSG C (A1, D1)0.446 91 Gravel roads, HSG D (A1, B1, C1, D1)0.229 30 Meadow, non-grazed, HSG A (A1, C1, D1)0.114 71 Meadow, non-grazed, HSG C (A1, C1, D1)5.556 78 Meadow, non-grazed, HSG D (A1, B1, C1, D1)0.357 98 Paved parking, HSG A (C1, D1)0.014 98 Paved parking, HSG B (C1)0.008 98 Paved parking, HSG C (D1)0.832 98 Paved parking, HSG D (C1, D1)0.092 98 Unconnected pavement, HSG D (A1, B1, C1, D1)0.023 36 Woods, Fair, HSG A (A1, C1)0.842 73 Woods, Fair, HSG C (A1, C1)2.496 79 Woods, Fair, HSG D (A1, C1, D1)11.283 80 TOTAL AREAType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 4HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A1: Runoff = 7.73 cfs @ 12.12 hrs, Volume= 0.610 af, Depth= 1.46" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Description54,384 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A24,778 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C91,474 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A7,640 91 Gravel roads, HSG D953 89 Gravel roads, HSG C1,575 98 Unconnected pavement, HSG D218,623 78 Weighted Average217,048 99.28% Pervious Area1,575 0.72% Impervious Area1,575 100.00% Unconnected Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 5HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 TotalSubcatchment A1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Type III 24-hr2-yr Rainfall=3.45"Runoff Area=218,623 sfRunoff Volume=0.610 afRunoff Depth=1.46"Flow Length=308'Tc=8.2 minCN=787.73 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 6HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B1: Runoff = 0.47 cfs @ 12.15 hrs, Volume= 0.040 af, Depth= 1.53" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Description6,112 78 Meadow, non-grazed, HSG D6,218 78 Meadow, non-grazed, HSG D1,112 91 Gravel roads, HSG D135 98 Unconnected pavement, HSG D13,577 79 Weighted Average13,442 99.01% Pervious Area135 0.99% Impervious Area135 100.00% UnconnectedTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 7HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)0.50.450.40.350.30.250.20.150.10.050Type III 24-hr2-yr Rainfall=3.45"Runoff Area=13,577 sfRunoff Volume=0.040 afRunoff Depth=1.53"Flow Length=254'Tc=10.2 minCN=790.47 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 8HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C1: Runoff = 2.14 cfs @ 12.24 hrs, Volume= 0.215 af, Depth= 1.46" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Adj Description25,170 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A7,191 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,358 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A585 98 Unconnected pavement, HSG D77,099 79 78 Weighted Average, UI Adjusted55,338 71.78% Pervious Area21,761 28.22% Impervious Area585 2.69% Unconnected Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 9HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)210Type III 24-hr2-yr Rainfall=3.45"Runoff Area=77,099 sfRunoff Volume=0.215 afRunoff Depth=1.46"Flow Length=1,001'Tc=16.8 minUI Adjusted CN=782.14 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 10HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D1: Runoff = 6.67 cfs @ 12.19 hrs, Volume= 0.607 af, Depth= 1.74" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 2-yr Rainfall=3.45"Area (sf) CN Description80,169 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A38,003 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C9,808 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,312 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,831 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A1,710 98 Unconnected pavement, HSG D182,194 82 Weighted Average148,927 81.74% Pervious Area33,267 18.26% Impervious Area1,710 5.14% Unconnected Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 11HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)76543210Type III 24-hr2-yr Rainfall=3.45"Runoff Area=182,194 sfRunoff Volume=0.607 afRunoff Depth=1.74"Flow Length=965'Tc=13.4 minCN=826.67 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 12HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.72% Impervious, Inflow Depth = 1.46" for 2-yr eventInflow = 7.73 cfs @ 12.12 hrs, Volume= 0.610 afPrimary = 7.73 cfs @ 12.12 hrs, Volume= 0.610 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Inflow Area=5.019 ac7.73 cfs7.73 cfs Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 13HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.99% Impervious, Inflow Depth = 1.53" for 2-yr eventInflow = 0.47 cfs @ 12.15 hrs, Volume= 0.040 afPrimary = 0.47 cfs @ 12.15 hrs, Volume= 0.040 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)0.50.450.40.350.30.250.20.150.10.050Inflow Area=0.312 ac0.47 cfs0.47 cfsType III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 14HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 28.22% Impervious, Inflow Depth = 1.46" for 2-yr eventInflow = 2.14 cfs @ 12.24 hrs, Volume= 0.215 afPrimary = 2.14 cfs @ 12.24 hrs, Volume= 0.215 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)210Inflow Area=1.770 ac2.14 cfs2.14 cfs Type III 24-hr 2-yr Rainfall=3.45"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 15HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 18.26% Impervious, Inflow Depth = 1.74" for 2-yr eventInflow = 6.67 cfs @ 12.19 hrs, Volume= 0.607 afPrimary = 6.67 cfs @ 12.19 hrs, Volume= 0.607 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)76543210Inflow Area=4.183 ac6.67 cfs6.67 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 16HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A1: Runoff = 15.14 cfs @ 12.12 hrs, Volume= 1.177 af, Depth= 2.81" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Description54,384 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A24,778 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C91,474 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A7,640 91 Gravel roads, HSG D953 89 Gravel roads, HSG C1,575 98 Unconnected pavement, HSG D218,623 78 Weighted Average217,048 99.28% Pervious Area1,575 0.72% Impervious Area1,575 100.00% Unconnected Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 17HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 TotalSubcatchment A1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)161514131211109876543210Type III 24-hr10-yr Rainfall=5.12"Runoff Area=218,623 sfRunoff Volume=1.177 afRunoff Depth=2.81"Flow Length=308'Tc=8.2 minCN=7815.14 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 18HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B1: Runoff = 0.91 cfs @ 12.15 hrs, Volume= 0.075 af, Depth= 2.91" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Description6,112 78 Meadow, non-grazed, HSG D6,218 78 Meadow, non-grazed, HSG D1,112 91 Gravel roads, HSG D135 98 Unconnected pavement, HSG D13,577 79 Weighted Average13,442 99.01% Pervious Area135 0.99% Impervious Area135 100.00% UnconnectedTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 19HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Type III 24-hr10-yr Rainfall=5.12"Runoff Area=13,577 sfRunoff Volume=0.075 afRunoff Depth=2.91"Flow Length=254'Tc=10.2 minCN=790.91 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 20HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C1: Runoff = 4.20 cfs @ 12.23 hrs, Volume= 0.415 af, Depth= 2.81" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Adj Description25,170 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A7,191 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,358 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A585 98 Unconnected pavement, HSG D77,099 79 78 Weighted Average, UI Adjusted55,338 71.78% Pervious Area21,761 28.22% Impervious Area585 2.69% Unconnected Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 21HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)43210Type III 24-hr10-yr Rainfall=5.12"Runoff Area=77,099 sfRunoff Volume=0.415 afRunoff Depth=2.81"Flow Length=1,001'Tc=16.8 minUI Adjusted CN=784.20 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 22HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D1: Runoff = 12.20 cfs @ 12.19 hrs, Volume= 1.111 af, Depth= 3.19" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 10-yr Rainfall=5.12"Area (sf) CN Description80,169 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A38,003 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C9,808 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,312 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,831 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A1,710 98 Unconnected pavement, HSG D182,194 82 Weighted Average148,927 81.74% Pervious Area33,267 18.26% Impervious Area1,710 5.14% Unconnected Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 23HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)131211109876543210Type III 24-hr10-yr Rainfall=5.12"Runoff Area=182,194 sfRunoff Volume=1.111 afRunoff Depth=3.19"Flow Length=965'Tc=13.4 minCN=8212.20 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 24HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.72% Impervious, Inflow Depth = 2.81" for 10-yr eventInflow = 15.14 cfs @ 12.12 hrs, Volume= 1.177 afPrimary = 15.14 cfs @ 12.12 hrs, Volume= 1.177 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)161514131211109876543210Inflow Area=5.019 ac15.14 cfs15.14 cfs Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 25HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.99% Impervious, Inflow Depth = 2.91" for 10-yr eventInflow = 0.91 cfs @ 12.15 hrs, Volume= 0.075 afPrimary = 0.91 cfs @ 12.15 hrs, Volume= 0.075 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Inflow Area=0.312 ac0.91 cfs0.91 cfsType III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 26HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 28.22% Impervious, Inflow Depth = 2.81" for 10-yr eventInflow = 4.20 cfs @ 12.23 hrs, Volume= 0.415 afPrimary = 4.20 cfs @ 12.23 hrs, Volume= 0.415 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)43210Inflow Area=1.770 ac4.20 cfs4.20 cfs Type III 24-hr 10-yr Rainfall=5.12"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 27HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 18.26% Impervious, Inflow Depth = 3.19" for 10-yr eventInflow = 12.20 cfs @ 12.19 hrs, Volume= 1.111 afPrimary = 12.20 cfs @ 12.19 hrs, Volume= 1.111 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)131211109876543210Inflow Area=4.183 ac12.20 cfs12.20 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 28HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A1: Runoff = 20.05 cfs @ 12.12 hrs, Volume= 1.560 af, Depth= 3.73" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Description54,384 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A24,778 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C91,474 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A7,640 91 Gravel roads, HSG D953 89 Gravel roads, HSG C1,575 98 Unconnected pavement, HSG D218,623 78 Weighted Average217,048 99.28% Pervious Area1,575 0.72% Impervious Area1,575 100.00% Unconnected Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 29HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 TotalSubcatchment A1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)222120191817161514131211109876543210Type III 24-hr25-yr Rainfall=6.17"Runoff Area=218,623 sfRunoff Volume=1.560 afRunoff Depth=3.73"Flow Length=308'Tc=8.2 minCN=7820.05 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 30HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B1: Runoff = 1.20 cfs @ 12.15 hrs, Volume= 0.100 af, Depth= 3.83" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Description6,112 78 Meadow, non-grazed, HSG D6,218 78 Meadow, non-grazed, HSG D1,112 91 Gravel roads, HSG D135 98 Unconnected pavement, HSG D13,577 79 Weighted Average13,442 99.01% Pervious Area135 0.99% Impervious Area135 100.00% UnconnectedTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 31HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Type III 24-hr25-yr Rainfall=6.17"Runoff Area=13,577 sfRunoff Volume=0.100 afRunoff Depth=3.83"Flow Length=254'Tc=10.2 minCN=791.20 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 32HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C1: Runoff = 5.57 cfs @ 12.23 hrs, Volume= 0.550 af, Depth= 3.73" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Adj Description25,170 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A7,191 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,358 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A585 98 Unconnected pavement, HSG D77,099 79 78 Weighted Average, UI Adjusted55,338 71.78% Pervious Area21,761 28.22% Impervious Area585 2.69% Unconnected Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 33HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)6543210Type III 24-hr25-yr Rainfall=6.17"Runoff Area=77,099 sfRunoff Volume=0.550 afRunoff Depth=3.73"Flow Length=1,001'Tc=16.8 minUI Adjusted CN=785.57 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 34HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D1: Runoff = 15.78 cfs @ 12.18 hrs, Volume= 1.444 af, Depth= 4.14" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 25-yr Rainfall=6.17"Area (sf) CN Description80,169 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A38,003 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C9,808 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,312 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,831 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A1,710 98 Unconnected pavement, HSG D182,194 82 Weighted Average148,927 81.74% Pervious Area33,267 18.26% Impervious Area1,710 5.14% Unconnected Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 35HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)17161514131211109876543210Type III 24-hr25-yr Rainfall=6.17"Runoff Area=182,194 sfRunoff Volume=1.444 afRunoff Depth=4.14"Flow Length=965'Tc=13.4 minCN=8215.78 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 36HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.72% Impervious, Inflow Depth = 3.73" for 25-yr eventInflow = 20.05 cfs @ 12.12 hrs, Volume= 1.560 afPrimary = 20.05 cfs @ 12.12 hrs, Volume= 1.560 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)222120191817161514131211109876543210Inflow Area=5.019 ac20.05 cfs20.05 cfs Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 37HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.99% Impervious, Inflow Depth = 3.83" for 25-yr eventInflow = 1.20 cfs @ 12.15 hrs, Volume= 0.100 afPrimary = 1.20 cfs @ 12.15 hrs, Volume= 0.100 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Inflow Area=0.312 ac1.20 cfs1.20 cfsType III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 38HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 28.22% Impervious, Inflow Depth = 3.73" for 25-yr eventInflow = 5.57 cfs @ 12.23 hrs, Volume= 0.550 afPrimary = 5.57 cfs @ 12.23 hrs, Volume= 0.550 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)6543210Inflow Area=1.770 ac5.57 cfs5.57 cfs Type III 24-hr 25-yr Rainfall=6.17"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 39HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 18.26% Impervious, Inflow Depth = 4.14" for 25-yr eventInflow = 15.78 cfs @ 12.18 hrs, Volume= 1.444 afPrimary = 15.78 cfs @ 12.18 hrs, Volume= 1.444 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)17161514131211109876543210Inflow Area=4.183 ac15.78 cfs15.78 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 40HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment A1: Runoff = 27.70 cfs @ 12.12 hrs, Volume= 2.170 af, Depth= 5.19" Routed to Link POA-A : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Description54,384 78 Meadow, non-grazed, HSG D1,075 71 Meadow, non-grazed, HSG C670 30 Meadow, non-grazed, HSG A24,778 78 Meadow, non-grazed, HSG D1,720 71 Meadow, non-grazed, HSG C91,474 79 Woods, Fair, HSG D33,692 73 Woods, Fair, HSG C662 36 Woods, Fair, HSG A7,640 91 Gravel roads, HSG D953 89 Gravel roads, HSG C1,575 98 Unconnected pavement, HSG D218,623 78 Weighted Average217,048 99.28% Pervious Area1,575 0.72% Impervious Area1,575 100.00% Unconnected Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 41HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.9 100 0.1100 0.24Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.1 13 0.3462 4.12Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 8 0.1250 5.69Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 21 0.3095 3.89Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps1.1 166 0.2530 2.51Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps8.2 308 TotalSubcatchment A1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)302826242220181614121086420Type III 24-hr100-yr Rainfall=7.78"Runoff Area=218,623 sfRunoff Volume=2.170 afRunoff Depth=5.19"Flow Length=308'Tc=8.2 minCN=7827.70 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 42HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment B1: Runoff = 1.65 cfs @ 12.14 hrs, Volume= 0.138 af, Depth> 5.30" Routed to Link POA-B : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Description6,112 78 Meadow, non-grazed, HSG D6,218 78 Meadow, non-grazed, HSG D1,112 91 Gravel roads, HSG D135 98 Unconnected pavement, HSG D13,577 79 Weighted Average13,442 99.01% Pervious Area135 0.99% Impervious Area135 100.00% UnconnectedTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.5 100 0.0500 0.17Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 62 0.1290 2.51Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 51 0.3333 4.04Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.0 10 0.1000 5.09Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps0.1 31 0.2903 3.77Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps10.2 254 Total Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 43HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSubcatchment B1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Type III 24-hr100-yr Rainfall=7.78"Runoff Area=13,577 sfRunoff Volume=0.138 afRunoff Depth>5.30"Flow Length=254'Tc=10.2 minCN=791.65 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 44HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment C1: Runoff = 7.70 cfs @ 12.23 hrs, Volume= 0.765 af, Depth= 5.19" Routed to Link POA-C : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Adj Description25,170 78 Meadow, non-grazed, HSG D1,693 71 Meadow, non-grazed, HSG C8,141 30 Meadow, non-grazed, HSG A7,191 78 Meadow, non-grazed, HSG D7,463 79 Woods, Fair, HSG D2,986 73 Woods, Fair, HSG C336 36 Woods, Fair, HSG A2,358 91 Gravel roads, HSG D8,413 98 Paved parking, HSG D620 98 Paved parking, HSG B12,143 98 Paved parking, HSG A585 98 Unconnected pavement, HSG D77,099 79 78 Weighted Average, UI Adjusted55,338 71.78% Pervious Area21,761 28.22% Impervious Area585 2.69% Unconnected Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 45HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)11.7 100 0.0300 0.14Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"1.1 126 0.0794 1.97Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 80 0.3375 4.07Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps3.1 607 0.0264 3.30Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps0.3 44 0.1136 2.36Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.3 44 0.2500 2.50Shallow Concentrated Flow, Shallow - WoodsWoodland Kv= 5.0 fps16.8 1,001 TotalSubcatchment C1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Type III 24-hr100-yr Rainfall=7.78"Runoff Area=77,099 sfRunoff Volume=0.765 afRunoff Depth=5.19"Flow Length=1,001'Tc=16.8 minUI Adjusted CN=787.70 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 46HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Subcatchment D1: Runoff = 21.29 cfs @ 12.18 hrs, Volume= 1.968 af, Depth> 5.65" Routed to Link POA-D : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsType III 24-hr 100-yr Rainfall=7.78"Area (sf) CN Description80,169 78 Meadow, non-grazed, HSG D0 71 Meadow, non-grazed, HSG C1,146 30 Meadow, non-grazed, HSG A38,003 78 Meadow, non-grazed, HSG D489 71 Meadow, non-grazed, HSG C9,808 79 Woods, Fair, HSG D0 73 Woods, Fair, HSG C8,312 91 Gravel roads, HSG D940 89 Gravel roads, HSG C10,060 76 Gravel roads, HSG A27,831 98 Paved parking, HSG D329 98 Paved parking, HSG C3,397 98 Paved parking, HSG A1,710 98 Unconnected pavement, HSG D182,194 82 Weighted Average148,927 81.74% Pervious Area33,267 18.26% Impervious Area1,710 5.14% Unconnected Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 47HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.9 100 0.0600 0.19Sheet Flow, Sheet - MeadowGrass: Dense n= 0.240 P2= 3.45"0.4 73 0.1781 2.95Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps0.2 64 0.4219 4.55Shallow Concentrated Flow, Shallow - MeadowShort Grass Pasture Kv= 7.0 fps2.6 634 0.0394 4.03Shallow Concentrated Flow, Shallow - PavementPaved Kv= 20.3 fps1.3 94 0.0053 1.17Shallow Concentrated Flow, Shallow - GravelUnpaved Kv= 16.1 fps13.4 965 TotalSubcatchment D1: RunoffHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)23222120191817161514131211109876543210Type III 24-hr100-yr Rainfall=7.78"Runoff Area=182,194 sfRunoff Volume=1.968 afRunoff Depth>5.65"Flow Length=965'Tc=13.4 minCN=8221.29 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 48HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-A: Inflow Area = 5.019 ac, 0.72% Impervious, Inflow Depth = 5.19" for 100-yr eventInflow = 27.70 cfs @ 12.12 hrs, Volume= 2.170 afPrimary = 27.70 cfs @ 12.12 hrs, Volume= 2.170 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-A: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)302826242220181614121086420Inflow Area=5.019 ac27.70 cfs27.70 cfs Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 49HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-B: Inflow Area = 0.312 ac, 0.99% Impervious, Inflow Depth > 5.30" for 100-yr eventInflow = 1.65 cfs @ 12.14 hrs, Volume= 0.138 afPrimary = 1.65 cfs @ 12.14 hrs, Volume= 0.138 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-B: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)10Inflow Area=0.312 ac1.65 cfs1.65 cfsType III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 50HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-C: Inflow Area = 1.770 ac, 28.22% Impervious, Inflow Depth = 5.19" for 100-yr eventInflow = 7.70 cfs @ 12.23 hrs, Volume= 0.765 afPrimary = 7.70 cfs @ 12.23 hrs, Volume= 0.765 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-C: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)876543210Inflow Area=1.770 ac7.70 cfs7.70 cfs Type III 24-hr 100-yr Rainfall=7.78"669 Oakdale Road Montville - Post Printed 6/12/2023Prepared by Weston & Sampson Engineers, IncPage 51HydroCAD® 10.20-2d s/n 00455 © 2021 HydroCAD Software Solutions LLCSummary for Link POA-D: Inflow Area = 4.183 ac, 18.26% Impervious, Inflow Depth > 5.65" for 100-yr eventInflow = 21.29 cfs @ 12.18 hrs, Volume= 1.968 afPrimary = 21.29 cfs @ 12.18 hrs, Volume= 1.968 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 6.00-30.00 hrs, dt= 0.05 hrsLink POA-D: InflowPrimaryHydrographTime (hours)3029282726252423222120191817161514131211109876Flow (cfs)23222120191817161514131211109876543210Inflow Area=4.183 ac21.29 cfs21.29 cfs