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HomeMy WebLinkAbout22SITE 7 App 169 Main Street, 700 Plaza Middlesex Middletown, CT 06457 860.343.8297 | wright-pierce.com September 13, 2022 Town of Montville Planning and Zoning Commission 310 Norwich-New London Turnpike Uncasville, CT 06382 SUBJECT: Cook Hill Tank Replacement – Site Plan Application 50 Cook Drive, Montville, CT 06382 Dear Chairman Lundy, On behalf of the Town of Montville Water Pollution Control Authority (WPCA), we request the following application for Site Plan be accepted for site plan review: Cook Hill Tank Replacement Project. Wright-Pierce has prepared this Application for the Cook Hill Tank Replacement Project. The project includes the construction of a new 531,200-gallon glass-fused-to-steel water storage tank approximately 105-ft tall at 50 Cook Drive in Montville, CT (the site). The new tank will be constructed adjacent to the existing 590,000- gallon welded steel tank built in 1999 on the same parcel. The existing tank is used by the Town of Montville Emergency Services to support communication equipment and antennas for the Town. The existing tank will remain in place pending a future project to demolish the tank and construct a dedicated antenna tower and equipment building on site. The Zoning Board of Appeals as approved a variance for building setback at the September 7, 2022 hearing. The Certificate of Variance is included as an attachment to this application. Zoning The parcel is located in the R20 Zone. See attached Zoning Map. Although located in the R20 Zone, the site is isolated from urban areas and is surrounded by trees with limited abutters. The proposed tank is located on the western side of the parcel. Ancillary structures consisting of equipment control enclosures, a pole- mounted site light, and a standby generator are proposed along the western side of the property. Site lighting will be shielded to prevent light from shining or reflecting on adjoining properties. Site The parcel is owned by the Town of Montville and is 10,768-square feet (0.2472-acres) in area. The site is accessed by means of a Town-owned easement from the public right-of-way of Cook Drive. The project location is not within a FEMA flood hazard zone, as shown by the attached FIRMette. Additionally, the site was inspected by New England Environmental Services for wetlands or water courses, and none were identified. See the attached letter New England Environmental Services dated March 21, 2022. Finally, the site is located outside the Natural Diversity Data Base preliminary screening area. See attached NDDB map and NDDB Determination Letter dated February 4, 2022. 9/13/2022 Town of Montville Planning and Zoning Commission Page 2 of 3 Stormwater The site is located at the top of a hill and sheds surface water to the east. The existing tank has an overflow pipe that outlets on the east side of the tank for the rare event of over-filling the tank. The proposed tank also has an overflow pipe that outlets at the base of the tank onto a concrete pad extending to a riprap channel approximately 4-ft wide which extends 110-ft towards the eastern property line ending at the small detention basin and level spreader BMP on the east end. This proposed channel will serve not only to direct flows from the rare event of a tank overflow, but also collect surface water runoff and provide detention for approximately 185-cf to address the additional surface water flow increase from the new impervious surfaces. The detention basin has been sized for the 25-yr storm event, as detailed on the attached Civil C-3 drawing and details on the mitigation stormwater controls. The impervious area of the site is increasing by 710-sf with the new water storage tank and ancillary ground- mounted equipment adjacent to the tank. The runoff volume for the existing and proposed conditions under a 25-year design storm are listed in the table below. This net increase in stormwater runoff is 174 cf. For the hydrologic calculations, we utilized HydroCAD modeling software and used the NOAA Atlas, Volume 10, Version 3 rainfall data. The rainfall amount of 6.15 inches was used for the 25-year, 24-hour storm event. Impervious Area (sf) 25-yr Storm Volume (af) 25-yr Storm Volume (cf) 25-yr Storm Peak Discharge (cfs) Pre-Development 710 0.064 2,788 0.61 Post-Development 1,420 0.068 2,962 0.64 Abbreviations: 1. Square-feet = sf 2. Acre-feet = af 3. Cubic-feet = cf 4. Cubic-feet per second = cfs 5. Feet = ft Based upon the values below, the groundwater recharge volume is calculated to be 32 cf. This assumes the more conservative NRCS Hydrologic Soil Group of B, which corresponds to the Charlton-Chatfield complex (73E) identified in the attached Web Soil Survey. This volume of 32-cf is less than the volume of the 185-cf detention basin and therefore is satisfactory for the required groundwater recharge volume. Drainage Area (sf) Impervious Area (sf) I (Impervious Ratio) Groundwater Recharge Depth (ft) Groundwater Recharge Volume (cf) Cook Hill Tank 10,148 1,550 0.153 0.25 32 9/13/2022 Town of Montville Planning and Zoning Commission Page 3 of 3 The project will result in the disturbance of less than 1 acre of land; therefore, a Soil and Erosion and Sediment Control Plan is not included in this application. However, erosion and sedimentation controls will be implemented in the final project drawings. Please contact Barry Parfitt, PE of Wright-Pierce at (860) 852-1914 or barry.parfitt@wright-pierce.com with any questions. Sincerely, WRIGHT-PIERCE Barry Parfitt, PE Mariusz Jedrychowski, PE Lead Project Engineer Senior Project Manager barry.parfitt@wright-pierce.com mariusz.jedrychowski@wright-pierce.com Attachments: Site Plan Application Certificate of Variance List of Abutters Site Location Map (1” = 1,000’) USGS Topography Map GIS Map Zoning Map Wetlands Inspection Letter NDDB Preliminary Screening Map & Determination Letter Stormwater HydroCAD Report FIRMette Map NRCS Web Soil Survey Site Plan (separate attachment) Application H:\APPLICATION FORMS\APPs & Guidelines (Each) rev 11-16-2018\Site-SP APP rev 11-15-2018.docx Town of Montville Planning & Zoning Commission Site Plan or Special Permit Application  Site Plan Number ____________ Plan Date ________________ Revision ________________  Special Permit Fee paid ____________ Revision ________________ ____________________________________________________ Assessors Map ___________ Lot ______________ Project Address _______________________________________________________________ Name of Applicant ____________________________________________________________ Address of Applicant __________________________________________________________ Project Name ________________________________________________________________ Tel #___________________________________Cell#________________________________ Fax #_____________________Email_____________________________________________ Name of Property Owner _______________________________________________________ Name of Attorney ____________________________________________________________ Tel #___________________________________Cell#________________________________ Fax #_____________________ Email_____________________________________________ Name of Engineer ____________________________________________________________ Tel #___________________________________Cell#________________________________ Fax #_____________________ Email_____________________________________________ __________________________________________________ Zoning District ____________ Lot Size ______________ Total Acres___________  Yes  No Regulated Wetlands Acreage __________ Permit Date______________  Yes  No Flood Plain Flood Hazard Area ___________________________  Yes  No A-2 Survey Name of Surveyor ____________________________ Building size __________s.f. Building height ______________________________ Number of acres to be disturbed _________________________________________________ Applicable Zoning Regulation(s)_________________________________________________ Project description ____________________________________________________________ ___________________________________________________________________________ ____________________________________________________ This project will use:  Septic system  Municipal sewer  Individual well  Public water supply well  SCWA well  Municipal water  Yes  No This project is located in a Public Water Supply Watershed  Yes  No This project has received approval from the Uncas Health District  Yes  No This project has received approval from the appropriate Water Authority ** Attach Copy of All Approvals Page 1 of 2 Site Plan /Special Permit Application H:\APPLICATION FORMS\APPs & Guidelines (Each) rev 11-16-2018\Site-SP Checklist rev 11-15-2018.doc Site Plan Review Checklist Site plans are required for all commercial and industrial uses and residential special permits. Site plans shall comply with Section 17 of the Zoning Regulations and shall be drawn at a scale of 1"=40' or at a scale approved by the Planning Director. (Maximum size 24" x 36") A written statement describing the proposed use or uses in sufficient detail will be submitted with each site plan to determine compliance with the permitted uses or special permits in the applicable district. A location map at a scale of one inch (1") equals 1,000 feet shall be submitted showing the subject property, streets, lot lines, and zoning district boundaries within 1,000 feet of the subject property. If space permits, the location map may be included as an insert on the site plan as required in section 17.4. An 8-½ x 11 inch photocopy of a USGS quad map with the project outlined must accompany the site plan. The name and address of the applicant and owner of record. North arrow, scale, date of the drawing or its revision and the name(s) and seal(s) of those persons preparing the site plan. Property boundaries, dimensions, and area in acres and square feet and all existing monuments, pipe markers and other physical evidence concerning property boundaries. Zoning districts and dimensions of all yards as required by these regulations. This information will be shown in both mapped and tabular form. Existing and proposed contour lines at 5 ft. Intervals. The Town Planner may require a 2 ft. Contour interval in order to clearly show topography and drainage. Location, width, and purpose of all existing and proposed easements and rights-of-way on the property. Location of all existing watercourses, wetlands, public water supply watershed boundaries, bedrock outcrops, and where appropriate, the mean high water line, flood hazard areas, and channel encroachment lines. Location and size in square feet of all existing and proposed structures including underground storage tanks and uses on the property and the approximate locations and size of all existing structures on the abutting properties which are within 100 feet of the property lot lines. Location of all storage areas for materials, supplies, products, vehicles and equipment that will not be kept inside a structure as required by the zoning regulations. Location, size, and arrangement of all parking and loading areas including existing and proposed driveway entrances and exits. The Town Planner may require the applicant to submit a traffic evaluation report or pedestrian report prepared by an engineer, licensed in the State of Connecticut, if the proposed development has the potential to impact traffic flow or significantly impact peak traffic counts. Location, size, and arrangement of all pedestrian walkways and sidewalks. Location, layout, type, and size of buffer or landscape area, plant materials, fencing, screening devices, or other materials proposed for use. Site Plan Review Checklist Page 1 of 3 H:\APPLICATION FORMS\APPs & Guidelines (Each) rev 11-16-2018\Site-SP Checklist rev 11-15-2018.doc Location, size, height, lighting, and orientation of all signs. Location, size, height, and orientation of all outdoor lighting facilities. The stormwater drainage system, including the location and elevations of all existing and proposed street drainage facilities within 100 feet of the property. The Town Planner of Town Engineer may require additional information and/or details regarding off-site drainage features affected by, or impacting upon the proposed development. Stormwater management systems shall be designed in accordance with the 2004 Connecticut Stormwater Quality Manual as may be amended from time to time. Location, size, and type of all water and fire protection facilities. Location, size, and type of all sewerage disposal facilities. Building elevations or preliminary architectural drawings showing the general type of building proposed for construction. In cases where the applicant intends to develop in stages, an overall site and staging plan shall be required. The Commission may require the applicant to submit an environmental evaluation report for a proposed development located in an environmentally sensitive area. Evaluation reports by independent professionals and other experts such as hydrologists, geologists and soil scientists may be required at the expense of the applicant. All signature and waiver blocks must be located in the lower right corner. Certificate of Public Convenience and Necessity in accordance with Section 4.10.8 of the Zoning Regulations. Sanitary Waste Disposal Plan. For any site which is to be served , and is capable of being served, by an operational public sanitary sewer line prior to occupancy, the site plan shall depict the sewer lateral and other engineering information suitable to determine that connection to an operational sanitary sewer line is feasible. In addition, the applicant shall provide evidence from the Montville Water Pollution Control Authority that it is capable of providing sanitary sewer service to the subject site. If the applicant proposes to utilize a community sewerage system, as defined in C.G.S. Section 7-245 as may be amended from time to time, a report from the Montville Water Pollution Control Authority indicating that all requirements of C.G.S. Section 7-246 as may be amended from time to time have been satisfied shall be provided. An Erosion and Sediment Control Plan designed in accordance with Section 15.1 of the Zoning Regulations. Special Requirements for Uses in Public Drinking Water Supply Watersheds The following special requirements shall apply to all Special Permit uses located within the Lake Konomoc and Stony Brook Reservoir watershed: 1. All septic systems shall be designed by a Sanitary Engineer registered in the State of Connecticut, and shall include a renovation analysis demonstrating compliance with current standards adopted by the DEEP. 2. No stormwater discharge from parking areas, roadways, rooftops or areas covered with similar impervious surfaces shall be deposited directly into any wetland or watercourse, nor discharged directly into the ground. Suitable surface and/or subsurface measures shall be taken to detain, filter, renovate and otherwise improve the quality of any such waters before discharge to surface or subsurface waters on or off the site. Existing wetlands may be employed for final treatment of stormwaters to the extent of their capacity to do so, but only after initial treatment by new wetlands or structural filtration methods. Site Plan Review Checklist Page 2 of 3 H:\APPLICATION FORMS\APPs & Guidelines (Each) rev 11-16-2018\Site-SP Checklist rev 11-15-2018.doc Digital data for Special Permits and Resubdivisions/Subdivisions shall be provided to the Planning Office after the recording of the final mylars on the land records. For Site Plans, the data shall be provided to the office after all signatures have been obtained by the appropriate authorities and prior to the issuance of a Zoning Permit.  The Digital Data shall include: a. One (1) PDF copy of the project b. Copy of the project in ArcView (GIS) format or AutoCAD  Shapefile (.shp)  Geodatabase (.mdb)  Export file (.e00)  AutoCAD.dwg  Having all features in a single AutoCAD layer or GIS file will not be accepted. For example, there must be separate layers/files for text, buildings, roads, wetlands, etc  All data represented in a digitally submitted AutoCAD or GIS drawing must be registered to the CT State Plane Coordinate System Using NAD 1983 datum.  Data can be submitted to the Planning Office via a flash-drive or CD. DETERMINATION OF APPLICABILITY The Commission may determine that one (1) or more of the site plan ingredient requirements of Section 17.4 is not necessary or required to reach a decision on the application. A determination of applicability of the applicable section(s) must be requested in writing by the applicant. Please refer to the Zoning Regulations to insure that you meet all requirements for setbacks, parking, signs, etc. Site Plan Review Checklist Page 3 of 3 Certificate of Variance List of Abutting Properties Site Plan Application Montville Planning and Zoning Commission Street # Street Name Owner Parcel ID 48 Cook Drive WICH Inc.099/009/000 1758 Route 32 Vizion Enterprises 094/029/000 Abutter's List for Lot 099/009/001 (50 Cook Drive) Site Location Map (1” = 1,000’) Cook Hill Tank PROJ NO:DATE: FIGURE: 1/25/2022T16001 1 Cook Hill Water Tank Montville, CT±JMN W:\GIS_Development\Projects\CT\Montville\T16001_CookHillWaterTank\MXDs\CookHillTank.aprx - Topo Map0 1,000 2,000500Feet 1" = 300' Uncasville Quad USGS Topography Map PROJECT SITE GIS Map 029-00017.3 Ac 013-00045.3 Ac 010-0002.04 Ac 009-0001.78 Ac 011-0011.18 Ac 001-00024.01 Ac 005-0001.16 Ac 008-0000.86 Ac 006-00A0.92 Ac 003-0000.8 Ac 013-00045.3 Ac 009-0010.25 Ac 006-0000.92 Ac 011-0000.91 Ac Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS,USDA, USGS, AeroGRID, IGN, and the GIS User Community, Esri, HERE,Garmin, (c) OpenStreetMap contributors, and the GIS user community Parcel Lines - Ortho Lot and Ac - anno Data shown on this map is provided for planning and informational purposes only. The municipality and CAI Technologies are not responsible for any use for other purposesor misuse or misrepresentation of this map. Cook Water Storage Tank Montville, CT January 25, 2022 ® www.cai-tech.com01412824231 inch = 141 Feet Zoning Map ProjectLocation50 Cook Dr Wetlands Inspection Letter NEW ENGLAND ENVIRONMENTAL SERVICES Wetland Consulting Specialists Since 1983 30 GINA LANE, MARLBOROUGH, CONNECTICUT 06447 richsnarski@gmail.com • 860-918-1970 • www.richsnarski.com March 21, 2022 Mr. Jason P. Berasi, P.L.S. Martinez Couch & Associates, LLC 1084 Cromwell Avenue, Suite A2 Rocky Hill, CT 06067 Re: Cook Drive Montville, Connecticut Dear Mr. Berasi: On February 28, 2022, I inspected the land on Cook Drive in Montville, which is shown on the attached map in red. There are no wetlands or watercourses present in the land outlined in red. If you have any questions, feel free to contact me. Respectively Submitted, New England Environmental Services R. Richard Snarski Professional Wetlands Scientist #1391 Registered Professional Soil Scientist Consulting Botanist RRS/srh NDDB Preliminary Screening Map Cook Tower 79 Elm Street • Hartford, CT 06106-5127 www.ct.gov/deep Affirmative Action/Equal Opportunity Employer February 4, 2022 Mia Jordan Wright-Pierce 169 Main St, 700 Plaza Middlesex Middletown CT 06457 Mia.jordan@wright-pierce.com Project: Cook Hill Water Tower Replacement, 50 Cook Dr, Montville, CT NDDB Determination No.: 202201074 Dear Mia Jordan, I have reviewed Natural Diversity Database (NDDB) maps and files regarding the area provided for the proposed replacement of the Cook Hill Water Tower in Montville, Connecticut. According to our records there are no reported populations of state or federal listed species in the vicinity of this property. We have not visited this site. The result of this review does not preclude the possibility that listed species may be encountered on site and that additional action may be necessary to remain in compliance with certain state permits. Contact NDDB to report the presence of any listed species and for more detailed guidance. This determination is good for two years. Please re-submit a new NDDB Request for Review if the scope of work changes or if work has not begun on this project by February 4, 2024. Natural Diversity Data Base information includes all information regarding critical biological resources available to us at the time of the request. This information is a compilation of data collected over the years by the Department of Energy and Environmental Protection’s Natural History Survey, cooperating units of DEEP, landowners, private conservation groups and the scientific community. This information is not necessarily the result of comprehensive or site-specific field investigations. Consultations with the NDDB should not be substitutes for on-site surveys necessary for a thorough environmental impact assessment. Current research projects and new contributors continue to identify additional populations of species and locations of habitats of concern, as well as, enhance existing data. Such new information is incorporated into the database as it becomes available. Please contact me if you have further questions at (860) 424-3378, or karen.zyko@ct.gov . Thank you for consulting the Natural Diversity Database. Sincerely, Karen Zyko Environmental Analyst Stormwater HydroCAD Report 1S PreDevelopment 2S Post-Development 3R Post-Analysis Point Pre Pre Analysis Point Routing Diagram for Cook_Hill_TankPrepared by {enter your company name here}, Printed 8/11/2022 HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 2HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 0.373 79 50-75% Grass cover, Fair, HSG C (1S, 2S) 0.033 98 Existing Tank, HSG C (1S, 2S) 0.016 98 Proposed, HSG C (2S) 0.422 81 TOTAL AREA Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 3HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 0.422 HSG C 1S, 2S 0.000 HSG D 0.000 Other 0.422 TOTAL AREA Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 4HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 0.373 0.000 0.000 0.373 50-75% Grass cover, Fair 1S, 2S 0.000 0.000 0.033 0.000 0.000 0.033 Existing Tank 1S, 2S 0.000 0.000 0.016 0.000 0.000 0.016 Proposed 2S 0.000 0.000 0.422 0.000 0.000 0.422 TOTAL AREA Type III 24-hr 25-yr Rainfall=6.15"Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 5HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=9,191 sf 7.72% Impervious Runoff Depth>3.65"Subcatchment 1S: PreDevelopment Flow Length=152' Slope=0.0050 '/' Tc=22.9 min CN=80 Runoff=0.61 cfs 0.064 af Runoff Area=9,194 sf 15.44% Impervious Runoff Depth>3.86"Subcatchment 2S: Post-Development Flow Length=152' Slope=0.0050 '/' Tc=22.9 min CN=82 Runoff=0.64 cfs 0.068 af Inflow=0.64 cfs 0.068 afReach 3R: Post-Analysis Point Outflow=0.64 cfs 0.068 af Inflow=0.61 cfs 0.064 afReach Pre: Pre Analysis Point Outflow=0.61 cfs 0.064 af Total Runoff Area = 0.422 ac Runoff Volume = 0.132 af Average Runoff Depth = 3.76" 88.41% Pervious = 0.373 ac 11.59% Impervious = 0.049 ac Type III 24-hr 25-yr Rainfall=6.15"Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 6HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: PreDevelopment Runoff = 0.61 cfs @ 12.31 hrs, Volume= 0.064 af, Depth> 3.65" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 25-yr Rainfall=6.15" Area (sf) CN Description 8,481 79 50-75% Grass cover, Fair, HSG C * 710 98 Existing Tank, HSG C 9,191 80 Weighted Average 8,481 92.28% Pervious Area 710 7.72% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 22.9 152 0.0050 0.11 Sheet Flow, Grassy Area Grass: Short n= 0.150 P2= 3.46" Subcatchment 1S: PreDevelopment Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type III 24-hr 25-yr Rainfall=6.15" Runoff Area=9,191 sf Runoff Volume=0.064 af Runoff Depth>3.65" Flow Length=152' Slope=0.0050 '/' Tc=22.9 min CN=80 0.61 cfs Type III 24-hr 25-yr Rainfall=6.15"Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 7HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Development Runoff = 0.64 cfs @ 12.31 hrs, Volume= 0.068 af, Depth> 3.86" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 25-yr Rainfall=6.15" Area (sf) CN Description 7,774 79 50-75% Grass cover, Fair, HSG C * 710 98 Existing Tank, HSG C * 710 98 Proposed, HSG C 9,194 82 Weighted Average 7,774 84.56% Pervious Area 1,420 15.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 22.9 152 0.0050 0.11 Sheet Flow, Grassy Area Grass: Short n= 0.150 P2= 3.46" Subcatchment 2S: Post-Development Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type III 24-hr 25-yr Rainfall=6.15" Runoff Area=9,194 sf Runoff Volume=0.068 af Runoff Depth>3.86" Flow Length=152' Slope=0.0050 '/' Tc=22.9 min CN=82 0.64 cfs Type III 24-hr 25-yr Rainfall=6.15"Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 8HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Summary for Reach 3R: Post-Analysis Point [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.211 ac, 15.44% Impervious, Inflow Depth > 3.86" for 25-yr event Inflow = 0.64 cfs @ 12.31 hrs, Volume= 0.068 af Outflow = 0.64 cfs @ 12.31 hrs, Volume= 0.068 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Reach 3R: Post-Analysis Point Inflow Outflow Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.211 ac0.64 cfs 0.64 cfs Type III 24-hr 25-yr Rainfall=6.15"Cook_Hill_Tank Printed 8/11/2022Prepared by {enter your company name here} Page 9HydroCAD® 10.00-26 s/n 01135 © 2020 HydroCAD Software Solutions LLC Summary for Reach Pre: Pre Analysis Point [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.211 ac, 7.72% Impervious, Inflow Depth > 3.65" for 25-yr event Inflow = 0.61 cfs @ 12.31 hrs, Volume= 0.064 af Outflow = 0.61 cfs @ 12.31 hrs, Volume= 0.064 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Reach Pre: Pre Analysis Point Inflow Outflow Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.211 ac0.61 cfs 0.61 cfs FIRMette Map 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 6/29/2022 at 12:21 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°6'30"W 41°28'40"N 72°5'53"W 41°28'13"N Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020 NRCS Web Soil Survey United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for State of Connecticut Cook Hill Tank - Montville, CT Natural Resources Conservation Service May 3, 2022 9 Custom Soil Resource Report Soil Map 459538045953904595400459541045954204595430459544045954504595460459547045953804595390459540045954104595420459543045954404595450459546045954704595480741830 741840 741850 741860 741870 741880 741890 741900 741910 741920 741930 741940 741950 741960 741970 741980 741830 741840 741850 741860 741870 741880 741890 741900 741910 741920 741930 741940 741950 741960 741970 741980 41° 28' 28'' N 72° 6' 14'' W41° 28' 28'' N72° 6' 7'' W41° 28' 24'' N 72° 6' 14'' W41° 28' 24'' N 72° 6' 7'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 18N WGS84 0 35 70 140 210 Feet 0 10 20 40 60 Meters Map Scale: 1:748 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 Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features 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 21, Sep 7, 2021 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Data not available. 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. Custom Soil Resource Report 10 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 44B Rainbow silt loam, 2 to 8 percent slopes, very stony 1.9 66.3% 73E Charlton-Chatfield complex, 15 to 45 percent slopes, very rocky 1.0 33.7% Totals for Area of Interest 2.9 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the Custom Soil Resource Report 11 development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 12 State of Connecticut 44B—Rainbow silt loam, 2 to 8 percent slopes, very stony Map Unit Setting National map unit symbol: 9lnp Elevation: 0 to 1,200 feet Mean annual precipitation: 43 to 56 inches Mean annual air temperature: 45 to 55 degrees F Frost-free period: 140 to 185 days Farmland classification: Not prime farmland Map Unit Composition Rainbow and similar soils:80 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Rainbow Setting Landform:Hills, drumlins Down-slope shape:Linear Across-slope shape:Concave Parent material:Eolian deposits over coarse-loamy lodgment till derived from gneiss and/or schist and/or sandstone and/or basalt Typical profile Ap - 0 to 6 inches: silt loam Bw1 - 6 to 18 inches: silt loam Bw2 - 18 to 26 inches: silt loam 2Cd - 26 to 65 inches: gravelly fine sandy loam Properties and qualities Slope:3 to 8 percent Surface area covered with cobbles, stones or boulders:1.6 percent Depth to restrictive feature:20 to 40 inches to densic material Drainage class:Moderately well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately high (0.00 to 0.20 in/hr) Depth to water table:About 18 to 30 inches Frequency of flooding:None Frequency of ponding:None Available water supply, 0 to 60 inches: Low (about 4.9 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: C Ecological site: F144AY037MA - Moist Dense Till Uplands Hydric soil rating: No Minor Components Sutton Percent of map unit:5 percent Custom Soil Resource Report 13 Landform:Drainageways, depressions Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Broadbrook Percent of map unit:5 percent Landform:Till plains, hills, drumlins Down-slope shape:Linear Across-slope shape:Concave Hydric soil rating: No Unnamed, nonstony surface Percent of map unit:2 percent Hydric soil rating: No Woodbridge Percent of map unit:2 percent Landform:Hills, drumlins Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Ridgebury Percent of map unit:2 percent Landform:Drainageways, depressions Down-slope shape:Concave Across-slope shape:Concave Hydric soil rating: Yes Wilbraham Percent of map unit:2 percent Landform:Drainageways, depressions Down-slope shape:Concave Across-slope shape:Concave Hydric soil rating: Yes Narragansett Percent of map unit:2 percent Landform:Till plains, hills Down-slope shape:Linear Across-slope shape:Convex Hydric soil rating: No 73E—Charlton-Chatfield complex, 15 to 45 percent slopes, very rocky Map Unit Setting National map unit symbol: 9lql Elevation: 0 to 1,200 feet Mean annual precipitation: 43 to 56 inches Mean annual air temperature: 45 to 55 degrees F Frost-free period: 140 to 185 days Custom Soil Resource Report 14 Farmland classification: Not prime farmland Map Unit Composition Charlton and similar soils:45 percent Chatfield and similar soils:30 percent Minor components:25 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Charlton Setting Landform:Hills Down-slope shape:Linear Across-slope shape:Linear Parent material:Coarse-loamy melt-out till derived from granite and/or schist and/or gneiss Typical profile Ap - 0 to 4 inches: fine sandy loam Bw1 - 4 to 7 inches: fine sandy loam Bw2 - 7 to 19 inches: fine sandy loam Bw3 - 19 to 27 inches: gravelly fine sandy loam C - 27 to 65 inches: gravelly fine sandy loam Properties and qualities Slope:15 to 45 percent Surface area covered with cobbles, stones or boulders:1.6 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.57 to 5.95 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Available water supply, 0 to 60 inches: Low (about 5.9 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Hydrologic Soil Group: B Ecological site: F144AY034CT - Well Drained Till Uplands Hydric soil rating: No Description of Chatfield Setting Landform:Ridges, hills Down-slope shape:Convex Across-slope shape:Linear Parent material:Coarse-loamy melt-out till derived from granite and/or schist and/or gneiss Typical profile Oa - 0 to 1 inches: highly decomposed plant material A - 1 to 6 inches: gravelly fine sandy loam Bw1 - 6 to 15 inches: gravelly fine sandy loam Custom Soil Resource Report 15 Bw2 - 15 to 29 inches: gravelly fine sandy loam 2R - 29 to 80 inches: unweathered bedrock Properties and qualities Slope:15 to 45 percent Surface area covered with cobbles, stones or boulders:1.6 percent Depth to restrictive feature:20 to 40 inches to lithic bedrock Drainage class:Well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat):Low to high (0.01 to 5.95 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Available water supply, 0 to 60 inches: Low (about 3.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Hydrologic Soil Group: B Ecological site: F144AY034CT - Well Drained Till Uplands Hydric soil rating: No Minor Components Rock outcrop Percent of map unit:10 percent Hydric soil rating: No Sutton Percent of map unit:5 percent Landform:Drainageways, depressions Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Leicester Percent of map unit:5 percent Landform:Drainageways, depressions Down-slope shape:Linear Across-slope shape:Concave Hydric soil rating: Yes Hollis Percent of map unit:3 percent Landform:Ridges, hills Down-slope shape:Convex Across-slope shape:Convex Hydric soil rating: No Unnamed, sandy subsoil Percent of map unit:1 percent Hydric soil rating: No Unnamed, red parent material Percent of map unit:1 percent Hydric soil rating: No Custom Soil Resource Report 16