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HomeMy WebLinkAbout25SITE3 - Stormwater Report Boundaries LLC 179 Pachaug River Drive P.O. Box 184 Griswold, CT 06351 T 860.376.2006 | F 860.376.5899 www.boundariesllc.net STORMWATER MANAGEMENT REPORT PREPARED FOR: CRICKET’S CORNER, LLC 1645 ROUTE 85 MONTVILLE, CONNECTICUT 06370 FEBRUARY 2025 PREPARED BY: BOUNDARIES LLC PROJECT I.D. NO. 24-3432 page 2Table of Contents Introduction ............................................................................................................................. 3 Pre-Development Conditions ......................................................................................................... 4 Post-Development Conditions ........................................................................................................ 6 Stormwater Basins ..................................................................................................................... 9 Construction Phase Stormwater Management ..................................................................................... 9 Summary ................................................................................................................................ 10 Table of Figures FIGURE 1 LOCATION MAP Table of Appendices APPENDIX A NRCS WEB SOIL SURVEY SOILS REPORT APPENDIX B HYDROCAD MODELING RESULTS APPENDIX C SUPPORTING CALCULATIONS APPENDIX D WATERSHED MAPS page 3Introduction Boundaries LLC has prepared the following stormwater management report for proposed improvements to two vacant adjacent parcels located at 1645 Route 85 and 879 Chesterfield Road in Montville. 879 Chesterfield Road is to be merged with 1645 Route 85. The stormwater management system has been designed to meet the requirements of the Connecticut Department of Energy and Environmental Protection (CT DEEP) Stormwater Quality Manual including peak flow control and pollution prevention. The proposed improvements consist of the construction of a 2-story wood framed building having a 6,300 SF footprint to contain a 6-classroom daycare facility on the ground floor and 2 3-bedroom apartment units on the second floor, construction of 2 playground areas to support the daycare facility, new paved circulation drives and parking areas to support the proposed uses, subsurface sewage disposal system, drilled well, and stormwater management system. The project area is identified on the Location Map included as Figure 1. According to the Natural Resources Conservation Service (NRCS) Web Soil Survey the soils on the site consist of the following: Ridgebury, Leicester, and Whitman soils, 0 to 8% slopes, extremely stony, classified as Hydrologic Soil Group D; Agawam fine sandy loam, 3 to 8% slopes, classified as Hydrologic Soil Group B; Canton and Charlton fine sandy loams, 3 to 15% slopes, extremely stony, classified as Hydrologic Soil Group B; Charlton-Chatfield complex, 0 to 15% slopes, very rocky, classified as Hydrologic Soil Group B; and Hollis-Chatfield-rock outcrop complex, 15 to 45% slopes, classified as Hydrologic Soil Group D. The Soils Report is provided in Appendix A. Pre- and post-development conditions hydrographs were estimated using the hydrologic modeling program HydroCAD. The methodology selected was NRCS TR-20. Times of concentration were estimated using multiple segment flow paths as described in the NRCS TR-55 manual. The NOAA Type D 24-hour storm was analyzed under antecedent moisture condition two. Design storm rainfall depths were accessed from the NOAA Precipitation Frequency Data server on November 25, 2024. HydroCAD modeling results are presented in Appendix B. The water quality volume was calculated using the methods detailed in the CT DEEP Stormwater Quality Manual. Supporting stormwater calculations are included in Appendix C. The watershed delineations are included in Appendix D. page 4Pre-Development Conditions The site consists of two existing adjacent parcels, 1645 Route 85 containing 6.16 acres more or less and 879 Chesterfield Road containing 11.72 acres more or less. 1645 Route 85 is located northerly of Route 85 and 879 Chesterfield Road is located westerly of Chesterfield Road. 1645 Route 85 is identified as Montville Tax Assessor’s map 12, block 9, lot 0. 879 Chesterfield Road is identified as Montville Tax Assessor’s map 5, block 15, lot 0C. Both properties are located in the Commerical-2 zoning district (C-2). 879 Chesterfield Road is to be merged with 1645 Route 85. The subject properties are mostly wooded with the exception of a grassed area along the frontage associated with 1645 Route 85 where a now removed residence once existed. The properties generally slope from northwest to southeast and runoff from the properties flow partially to inland wetlands along the eastern portion of 879 Chesterfield Road and the remaining runoff flows to an off-site culvert to the southeast of the property. Pre-development aerial photography of the properties is shown below. Aerial Photograph of Site (2016) page 5The pre-development watersheds are shown in Appendix D. The pre-development watersheds were delineated using topographic survey data for the subject parcel and aerial mapping for off-site contributing areas. Runoff Curve Numbers (CN) used for the pre-development conditions analysis are as follows: 55 (woods, good ground cover) for wooded areas in Hydrologic Soil Group B, 77 (woods, good ground cover) for wooded areas in Hydrologic Soil Group D, 61 (>75% grass cover) for grassed areas in Hydrologic Soil Group B, and 98 (impervious) for existing impervious areas such as paved/concrete areas, gravel areas and rooftops. The pre-development watersheds are described further below: Drainage Area #1 (DA-1) This 2.04± acre drainage area encompasses the area that contributes runoff to the inland wetlands along the eastern portion of the property. The drainage area is comprised of wooded areas. The weighted CN of the drainage area is 57. Runoff from this area flows southeasterly overland to the inland wetlands. Drainage Area #2 (DA-2) This 10.08± acre drainage area encompasses the area that contributes runoff to an off-site culvert to the southeast of the property. The drainage area is comprised of grassed areas, wooded areas, and off-site impervious surfaces including rooftops and paved circulation areas. The weighted CN of the drainage area is 61. Runoff from this area flows southeasterly overland to the culvert. Existing conditions peak runoff rates were analyzed at the discharge locations at the inland wetland boundary and the culvert. Existing conditions peak flow rates are summarized below in Table 1. Detailed modeling results are included in Appendix B. Table 1 Peak Runoff Rates – Existing Conditions Storm Event Total Peak Runoff Rate to Inland Wetlands (CFS) Total Peak Runoff Rate to Culvert (CFS) 2-Year 0.41 2.39 10-Year 2.04 8.38 25-Year 3.33 12.87 50-Year 4.38 16.50 100-Year 5.57 20.55 page 6Post-Development Conditions The proposed improvements consist of the construction of a 2-story wood framed building having a 6,300 SF footprint to contain a 6-classroom daycare facility on the ground floor and 2 3-bedroom apartments on the second floor, construction of 2 playground areas to support the daycare facility, new paved circulation drives and parking areas to support the proposed uses, subsurface sewage disposal system, drilled well, and stormwater management system. Stormwater runoff from the development area will be collected in the proposed infiltration basins. The stormwater management basins will discharge through a reinforced spillway to the undeveloped portions of the property. Stormwater runoff from the undisturbed area will continue to surface flow directly to the inland wetlands and culvert to the southeast of the property. The proposed stormwater management system meets the following design standards: • The post-development peak discharge rates from the 2-year, 10-year, 25-year, 50-year, and 100-year storms are less than or equal to pre-development peak discharge rates. • The emergency outlet has capacity to safely pass the post-development peak runoff from the 100-year storm without erosion. • The Water Quality Volume is retained on-site. Proposed conditions watersheds are shown in Appendix D. Proposed conditions watersheds were delineated using topographic survey data and the proposed development plans for the subject parcel. Land uses were determined using the proposed development plans. Runoff Curve Numbers (CN) used for the proposed conditions analysis are as follows: 55 (woods, good ground cover) for wooded areas in Hydrologic Soil Group B, 77 (woods, good ground cover) for wooded areas in Hydrologic Soil Group D, 61 (>75% grass cover) for grassed areas in Hydrologic Soil Group B, 80 (>75% grass cover) for grassed areas in Hydrologic Soil Group D, and 98 (impervious) for impervious areas such as paved/concrete areas, gravel areas and rooftops. The proposed conditions watersheds are described further below: Drainage Area #1A (DA-1A) This 2.09± acre drainage area encompasses the area that contributes runoff to Stormwater Management Basin #1 (SMB-1). The drainage area is comprised of the developed area of the site consisting of the proposed building, paved parking and circulation areas, playground areas, proposed grassed areas, and undeveloped wooded areas of the site. The weighted CN of the drainage area is 78. Runoff from this area is discharged to SMB-1 by means of surface flow and culverts associated with proposed catch basins and roof drains before discharging to wooded areas upgradient of the inland wetlands on the eastern portion of the property. Drainage Area #1B (DA-1B) This 0.73± acre drainage area encompasses the area that contributes runoff directly to the inland wetlands on the eastern portion of the property. The drainage area is comprised of proposed grassed areas and undeveloped wooded areas of the site. The weighted CN of the drainage area is 57. Runoff from this area surface flows directly through wooded areas to the inland wetlands. Proposed conditions peak runoff rates were analyzed at the discharge location at the inland wetland boundary. The peak runoff rates are summarized in Table 2. Detailed modeling results are included in Appendix B. page 7Table 2 Peak Runoff Rates to Inland Wetlands – Proposed Conditions vs. Existing Conditions Storm Event Proposed Conditions Peak Runoff Rate to Inland Wetlands (CFS) Existing Conditions Peak Runoff Rate to Inland Wetlands (CFS) Change in Peak Runoff Rate (CFS) 2-Year 0.17 0.41 -0.24 10-Year 1.41 2.04 -0.63 25-Year 3.15 3.33 -0.18 50-Year 4.31 4.38 -0.07 100-Year 5.41 5.57 -0.16 As demonstrated, the proposed stormwater management system provides peak runoff rate attenuation for all of the modeled storm events. Drainage Area #2A (DA-2A) This 4.02± acre drainage area encompasses the area that contributes runoff to Stormwater Management Basin #2 (SMB-2). The drainage area is comprised of the developed area of the site consisting of paved circulation areas, proposed grassed areas, undeveloped wooded areas, and off-site impervious surfaces including rooftops and paved circulation areas. The weighted CN of the drainage area is 76. Runoff from this area is discharged to SMB-2 by means of surface flow and culverts associated with proposed catch basins before discharging to undeveloped wooded portions of the property, upgradient of the culvert. Drainage Area #2B (DA-2B) This 5.29± acre drainage area encompasses the area that contributes runoff directly to undeveloped wooded portions of the property, upgradient of the culvert. The drainage area is comprised of proposed grassed areas and undeveloped wooded areas of the site. The weighted CN of the drainage area is 56. Runoff from this area surface flows directly to undeveloped wooded portions of the property upgradient of the culvert. Proposed conditions peak runoff rates were analyzed at the discharge location at the off-site culvert. The peak runoff rates are summarized in Table 3. Detailed modeling results are included in Appendix B. Table 3 Peak Runoff Rates to Culvert – Proposed Conditions vs. Existing Conditions Storm Event Proposed Conditions Peak Runoff Rate to Culvert (CFS) Existing Conditions Peak Runoff Rate to Culvert (CFS) Change in Peak Runoff Rate (CFS) 2-Year 1.28 2.39 -1.11 10-Year 7.74 8.38 -0.64 25-Year 11.37 12.87 -1.50 50-Year 13.98 16.50 -2.52 100-Year 19.00 20.55 -1.55 As demonstrated, the proposed stormwater management system provides peak runoff rate attenuation for all of the modeled storm events. page 8The proposed stormwater collection system consists of ten catch basins, five yard drains, two stormwater management basins, and piping connecting the stormwater structures to the stormwater management basins. The proposed collection system is sized for the 25-year storm event. A summary of the pipe capacities and 25-year storm flows are presented below in Table 4. Table 4 Stormwater Collection Design Summary Drainage Structure Peak Runoff for 25-Year Storm (CFS) Slope (FT/FT) Mannings Capacity (CFS) 12” RCP Culvert (P-CB 1 to P-CB 2) 0.457 0.020 5.048 12” RCP Culvert (P-CB 2 to P-CB 4) 0.978 0.063 8.939 12” RCP Culvert (P-CB 3 to P-CB 4) 0.470 0.020 5.048 12” RCP Culvert (P-CB 4 to P-CB 5) 2.081 0.083 10.260 12” RCP Culvert (P-CB 5 to P-CB 7) 2.329 0.048 7.858 12” RCP Culvert (P-FEU 1 to P-CB 6) 4.259 0.081 10.174 12” RCP Culvert (P-CB 6 to P-CB 7) 5.095 0.024 5.507 15” RCP Culvert (P-CB 7 to SMB-2) 7.970 0.015 8.027 6” PVC Culvert (P-YD 1 to P-YD 2) 0.220 0.015 0.749 6” PVC Culvert (P-YD 2 to P-YD 3) 0.237 0.015 0.755 6” PVC Culvert (P-YD 3 to P-YD 4) 0.241 0.015 0.746 6” PVC Culvert (P-YD 4 to P-YD 5) 0.245 0.015 0.755 8” PVC Culvert (P-YD 5 to P-CB 10) 1.707 0.018 1.740 12” RCP Culvert (P-CB 8 to P-CB 9) 0.950 0.152 13.905 12” RCP Culvert (P-CB 9 to P-CB 10) 1.396 0.013 4.124 12” RCP Culvert (P-CB 10 to SMB-1) 6.701 0.163 14.415 The stormwater management basin outlets will be protected from erosion by pre-formed riprap scour holes in accordance with the recommendations of the CT DOT Drainage Manual. The modeled velocities of the 100-year discharges as compared to typical allowable velocities for the proposed surface is presented in Table 5. Table 5 100-year Discharge/Overflow Erosion Potential Evaluation Stormwater Management Component 100-year Discharge/Overflow Velocity (FPS) Proposed Surface Treatment Typical Allowable Velocity (FPS) 12” Culvert Discharge (SMB-1) 5.01 Modified riprap scour hole 14.7 (per DOT Drainage Manual) Spillway (SMB-1) 0.71 Modified riprap 8.0 (per DOT Drainage Manual) 15” Culvert Discharge (SMB-2) 6.18 Modified riprap scour hole 14.7 (per DOT Drainage Manual) Spillway (SMB-2) 1.15 Modified riprap 8.0 (per DOT Drainage Manual) As presented above, the proposed stormwater management system is adequately protected from potential erosion as a result of modeled discharges during the 100-year storm event. page 9The stormwater management system is also required to retain the Water Quality Volume on-site. Runoff from pavement, roofs, concrete pads, and playground surfaces will be retained in the stormwater management basins. The proposed basins provide sufficient retention capacity for over 100% of the calculated Water Quality Volumes. The volumes retained by the proposed stormwater management basins and sediment forebays were determined using the HydroCAD stage-storage results. The calculations to determine the required volumes are included in Appendix C. The treatment volumes required and provided are presented in Table 6. Table 6 Runoff Treatment Sizing Criteria Stormwater Treatment System Storage Volume Provided (CF) Treatment Volume Required (CF) SMB-1 (100%) Sediment Forebay (25%) 6,395 1,046 3,905 976 SMB-2 (100%) Sediment Forebay (25%) 5,102 1,687 4,899 1,225 As demonstrated, the stormwater management system provides adequate capacity for retention of the required water quality volumes. Stormwater Basins The proposed stormwater basins are located in HSG B soils to the southeast of the development areas. The basins will function as infiltration basins. The basins collect stormwater runoff from the proposed development area, undisturbed woodland and maintained lawns. Proposed Interior Side Slopes – 3H:1V (both) Proposed Exterior Side Slopes – 3H:1V (both) Sum of the Side Slopes – 6H:1V (both) (Reference 2002 CT Guidelines for SESC, Detention Basins, Page 5-9-13, Earth Embankment, Side Slopes) Berm Top Width – 8 feet (both) Retained Volumes – 6,395 cubic feet (SMB-1); 5,102 cubic feet (SMB-2) Contributing Area Water Quality Volumes – 3,905 cubic feet (SMB-1); 4,899 cubic feet (SMB-2) Time to Drain After Storm – 35 hours (SMB-1); 22 hours (SMB-2) (Published Rawl’s Rate for HSG B loam) TSS Removal – 80% with sediment forebays per the Massachusetts DEP Stormwater Handbook, Volume 2, Chapter 2. Construction Phase Stormwater Management The project results in the temporary disturbance of approximately 3.6 acres of land. The following measures will be taken to protect water quality during construction: • Install an anti-tracking pad at the construction exit. • Provide sediment fence barriers and/or wood chip berms at the downgradient project limits. • Provide a sediment fence barrier upgradient of the infiltration basins to allow for the establishment of vegetation. • Surround stockpile(s) with sediment fence and seed with rye grass. page 10Summary The proposed stormwater management system has been designed in accordance with the CT DEEP Stormwater Quality Manual. The system provides peak flow control and runoff retention and treatment. The proposed improvements are shown on plans titled “Site Development Plans, Prepared For Cricket’s Corner, LLC, 1645 Route 85, Montville, Connecticut, February 2025, Sheet 1 of 13 through Sheet 13 of 13” prepared by Boundaries LLC. Location Map (Palmertown Quad) Cricket's Corner, LLC 1645 Route 85 - Montville, CT Appendix A NRCS Web Soil Survey Soils Report 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, Eastern Part Natural Resources Conservation Service September 25, 2024 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface....................................................................................................................2 Soil Map..................................................................................................................5 Soil Map................................................................................................................6 Legend..................................................................................................................7 Map Unit Legend..................................................................................................8 Map Unit Descriptions..........................................................................................8 State of Connecticut, Eastern Part..................................................................11 3—Ridgebury, Leicester, and Whitman soils, 0 to 8 percent slopes, extremely stony.....................................................................................11 15—Scarboro muck, 0 to 3 percent slopes.................................................13 29B—Agawam fine sandy loam, 3 to 8 percent slopes...............................15 61B—Canton and Charlton fine sandy loams, 0 to 8 percent slopes, very stony..............................................................................................17 62C—Canton and Charlton fine sandy loams, 3 to 15 percent slopes, extremely stony.....................................................................................19 73C—Charlton-Chatfield complex, 0 to 15 percent slopes, very rocky.......21 75E—Hollis-Chatfield-Rock outcrop complex, 15 to 45 percent slopes......24 85B—Paxton and Montauk fine sandy loams, 3 to 8 percent slopes, very stony..............................................................................................26 4 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 5 6 Custom Soil Resource Report Soil Map 45901004590200459030045904004590500459060045907004590200459030045904004590500459060045907004590800731900 732000 732100 732200 732300 732400 732500 732600 732700 732800 732900 732000 732100 732200 732300 732400 732500 732600 732700 732800 732900 41° 26' 6'' N 72° 13' 28'' W41° 26' 6'' N72° 12' 42'' W41° 25' 44'' N 72° 13' 28'' W41° 25' 44'' N 72° 12' 42'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 18N WGS84 0 200 400 800 1200 Feet 0 50 100 200 300 Meters Map Scale: 1:4,860 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, Eastern Part Survey Area Data: Version 1, Sep 15, 2023 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. Custom Soil Resource Report 7 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 3 Ridgebury, Leicester, and Whitman soils, 0 to 8 percent slopes, extremely stony 7.8 15.8% 15 Scarboro muck, 0 to 3 percent slopes 0.6 1.2% 29B Agawam fine sandy loam, 3 to 8 percent slopes 10.2 20.8% 61B Canton and Charlton fine sandy loams, 0 to 8 percent slopes, very stony 7.7 15.7% 62C Canton and Charlton fine sandy loams, 3 to 15 percent slopes, extremely stony 14.6 29.8% 73C Charlton-Chatfield complex, 0 to 15 percent slopes, very rocky 2.5 5.0% 75E Hollis-Chatfield-Rock outcrop complex, 15 to 45 percent slopes 5.1 10.4% 85B Paxton and Montauk fine sandy loams, 3 to 8 percent slopes, very stony 0.6 1.2% Totals for Area of Interest 49.1 100.0% 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 Custom Soil Resource Report 8 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 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. Custom Soil Resource Report 9 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 10 State of Connecticut, Eastern Part 3—Ridgebury, Leicester, and Whitman soils, 0 to 8 percent slopes, extremely stony Map Unit Setting National map unit symbol: 2t2qt Elevation: 0 to 1,480 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 240 days Farmland classification: Not prime farmland Map Unit Composition Ridgebury, extremely stony, and similar soils:40 percent Leicester, extremely stony, and similar soils:35 percent Whitman, extremely stony, and similar soils:17 percent Minor components:8 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ridgebury, Extremely Stony Setting Landform:Drumlins, ground moraines, hills, drainageways, depressions Landform position (two-dimensional):Toeslope, footslope Landform position (three-dimensional):Base slope, head slope Down-slope shape:Concave Across-slope shape:Concave Parent material:Coarse-loamy lodgment till derived from gneiss, granite, and/or schist Typical profile Oe - 0 to 1 inches: moderately decomposed plant material A - 1 to 6 inches: fine sandy loam Bw - 6 to 10 inches: sandy loam Bg - 10 to 19 inches: gravelly sandy loam Cd - 19 to 66 inches: gravelly sandy loam Properties and qualities Slope:0 to 8 percent Surface area covered with cobbles, stones or boulders:9.0 percent Depth to restrictive feature:15 to 35 inches to densic material Drainage class:Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately low (0.00 to 0.14 in/hr) Depth to water table:About 0 to 6 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Custom Soil Resource Report 11 Hydrologic Soil Group: D Ecological site: F144AY009CT - Wet Till Depressions Hydric soil rating: Yes Description of Leicester, Extremely Stony Setting Landform:Ground moraines, hills, drainageways, depressions Landform position (two-dimensional):Toeslope, footslope Landform position (three-dimensional):Base slope Down-slope shape:Concave, linear Across-slope shape:Concave Parent material:Coarse-loamy melt-out till derived from gneiss, granite, and/or schist Typical profile Oe - 0 to 1 inches: moderately decomposed plant material A - 1 to 7 inches: fine sandy loam Bg - 7 to 18 inches: fine sandy loam BC - 18 to 24 inches: fine sandy loam C1 - 24 to 39 inches: gravelly fine sandy loam C2 - 39 to 65 inches: gravelly fine sandy loam Properties and qualities Slope:0 to 8 percent Surface area covered with cobbles, stones or boulders:9.0 percent Depth to restrictive feature:More than 80 inches Drainage class:Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat):Moderately low to high (0.14 to 14.17 in/hr) Depth to water table:About 0 to 6 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: High (about 9.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Hydrologic Soil Group: B/D Ecological site: F144AY009CT - Wet Till Depressions Hydric soil rating: Yes Description of Whitman, Extremely Stony Setting Landform:Drumlins, ground moraines, hills, drainageways, depressions Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Base slope Down-slope shape:Concave Across-slope shape:Concave Parent material:Coarse-loamy lodgment till derived from gneiss, granite, and/or schist Typical profile Oi - 0 to 1 inches: peat Custom Soil Resource Report 12 A - 1 to 10 inches: fine sandy loam Bg - 10 to 17 inches: gravelly fine sandy loam Cdg - 17 to 61 inches: fine sandy loam Properties and qualities Slope:0 to 3 percent Surface area covered with cobbles, stones or boulders:9.0 percent Depth to restrictive feature:7 to 38 inches to densic material Drainage class:Very poorly drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately low (0.00 to 0.14 in/hr) Depth to water table:About 0 to 6 inches Frequency of flooding:None Frequency of ponding:Frequent Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Hydrologic Soil Group: D Ecological site: F144AY009CT - Wet Till Depressions Hydric soil rating: Yes Minor Components Woodbridge, extremely stony Percent of map unit:6 percent Landform:Hills, drumlins, ground moraines Landform position (two-dimensional):Backslope, footslope, summit Landform position (three-dimensional):Side slope, crest Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Swansea Percent of map unit:2 percent Landform:Bogs, swamps Down-slope shape:Concave Across-slope shape:Concave Hydric soil rating: Yes 15—Scarboro muck, 0 to 3 percent slopes Map Unit Setting National map unit symbol: 2svkt Elevation: 0 to 1,350 feet Custom Soil Resource Report 13 Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 240 days Farmland classification: Not prime farmland Map Unit Composition Scarboro and similar soils:80 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Scarboro Setting Landform:Drainageways, depressions, outwash deltas, outwash terraces Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Base slope, tread, dip Down-slope shape:Concave Across-slope shape:Linear, concave Parent material:Sandy glaciofluvial deposits derived from schist and/or gneiss and/or granite Typical profile Oa - 0 to 8 inches: muck A - 8 to 14 inches: mucky fine sandy loam Cg1 - 14 to 22 inches: sand Cg2 - 22 to 65 inches: gravelly sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature:More than 80 inches Drainage class:Very poorly drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (1.42 to 14.17 in/hr) Depth to water table:About 0 to 2 inches Frequency of flooding:None Frequency of ponding:Frequent Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 5w Hydrologic Soil Group: A/D Ecological site: F144AY031MA - Very Wet Outwash Hydric soil rating: Yes Minor Components Timakwa Percent of map unit:10 percent Landform:Swamps Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Base slope, tread, dip Down-slope shape:Concave, linear Across-slope shape:Concave, linear Hydric soil rating: Yes Custom Soil Resource Report 14 Walpole Percent of map unit:8 percent Landform:Deltas, depressions, outwash plains, depressions, outwash terraces Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Tread, talf, dip Down-slope shape:Concave Across-slope shape:Concave Hydric soil rating: Yes Deerfield Percent of map unit:2 percent Landform:Terraces, outwash plains Landform position (three-dimensional):Tread, dip Down-slope shape:Linear Across-slope shape:Concave Hydric soil rating: No 29B—Agawam fine sandy loam, 3 to 8 percent slopes Map Unit Setting National map unit symbol: 2tyqx Elevation: 0 to 820 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 250 days Farmland classification: All areas are prime farmland Map Unit Composition Agawam and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Agawam Setting Landform:Outwash terraces Landform position (three-dimensional):Tread Down-slope shape:Convex Across-slope shape:Convex Parent material:Coarse-loamy eolian deposits over sandy and gravelly glaciofluvial deposits derived from gneiss and/or granite and/or schist and/or phyllite Typical profile Ap - 0 to 11 inches: fine sandy loam Bw1 - 11 to 16 inches: fine sandy loam Bw2 - 16 to 26 inches: fine sandy loam 2C1 - 26 to 45 inches: loamy fine sand 2C2 - 45 to 55 inches: loamy fine sand 2C3 - 55 to 65 inches: loamy sand Custom Soil Resource Report 15 Properties and qualities Slope:3 to 8 percent Depth to restrictive feature:15 to 35 inches to strongly contrasting textural stratification Drainage class:Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat):Moderately low to high (0.14 to 14.17 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2s Hydrologic Soil Group: B Ecological site: F145XY008MA - Dry Outwash Hydric soil rating: No Minor Components Merrimac Percent of map unit:5 percent Landform:Outwash terraces Landform position (three-dimensional):Riser, tread Down-slope shape:Convex Across-slope shape:Convex Ecological site:F145XY008MA - Dry Outwash Hydric soil rating: No Ninigret Percent of map unit:4 percent Landform:Terraces Down-slope shape:Linear Across-slope shape:Concave Hydric soil rating: No Walpole Percent of map unit:3 percent Landform:Deltas, depressions, outwash terraces, depressions, outwash plains Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Tread, talf, dip Down-slope shape:Concave Across-slope shape:Concave Hydric soil rating: Yes Hinckley Percent of map unit:3 percent Landform:Eskers Landform position (three-dimensional):Side slope Down-slope shape:Convex Across-slope shape:Convex Ecological site:F145XY008MA - Dry Outwash Hydric soil rating: No Custom Soil Resource Report 16 61B—Canton and Charlton fine sandy loams, 0 to 8 percent slopes, very stony Map Unit Setting National map unit symbol: 2w81v Elevation: 0 to 1,480 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition Canton, very stony, and similar soils:50 percent Charlton, very stony, and similar soils:35 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Canton, Very Stony Setting Landform:Moraines, hills, ridges Landform position (two-dimensional):Summit, shoulder, backslope Landform position (three-dimensional):Side slope, crest, nose slope Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Coarse-loamy over sandy melt-out till derived from gneiss, granite, and/or schist Typical profile Oi - 0 to 2 inches: slightly decomposed plant material A - 2 to 5 inches: fine sandy loam Bw1 - 5 to 16 inches: fine sandy loam Bw2 - 16 to 22 inches: gravelly fine sandy loam 2C - 22 to 67 inches: gravelly loamy sand Properties and qualities Slope:0 to 8 percent Surface area covered with cobbles, stones or boulders:1.6 percent Depth to restrictive feature:19 to 39 inches to strongly contrasting textural stratification Drainage class:Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately low to high (0.14 to 14.17 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 inches) Custom Soil Resource Report 17 Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Ecological site: F144AY034CT - Well Drained Till Uplands Hydric soil rating: No Description of Charlton, Very Stony Setting Landform:Ridges, ground moraines, hills Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Side slope, crest Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Coarse-loamy melt-out till derived from granite, gneiss, and/or schist Typical profile Oe - 0 to 2 inches: moderately decomposed plant material A - 2 to 4 inches: fine sandy loam Bw - 4 to 27 inches: gravelly fine sandy loam C - 27 to 65 inches: gravelly fine sandy loam Properties and qualities Slope:0 to 8 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: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately low to high (0.14 to 14.17 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.7 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Ecological site: F144AY034CT - Well Drained Till Uplands Hydric soil rating: No Minor Components Sutton, very stony Percent of map unit:5 percent Landform:Ground moraines, hills Landform position (two-dimensional):Footslope Landform position (three-dimensional):Base slope Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Custom Soil Resource Report 18 Leicester, very stony Percent of map unit:5 percent Landform:Hills, drainageways, depressions, ground moraines Landform position (two-dimensional):Toeslope, footslope Landform position (three-dimensional):Base slope Down-slope shape:Concave, linear Across-slope shape:Concave Hydric soil rating: Yes Chatfield, very stony Percent of map unit:5 percent Landform:Ridges, hills Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Crest, side slope, nose slope Down-slope shape:Convex Across-slope shape:Linear, convex Hydric soil rating: No 62C—Canton and Charlton fine sandy loams, 3 to 15 percent slopes, extremely stony Map Unit Setting National map unit symbol: 2wks7 Elevation: 0 to 1,310 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 240 days Farmland classification: Not prime farmland Map Unit Composition Canton, extremely stony, and similar soils:50 percent Charlton, extremely stony, and similar soils:35 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Canton, Extremely Stony Setting Landform:Moraines, hills, ridges Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Side slope, crest, nose slope Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Coarse-loamy over sandy melt-out till derived from gneiss, granite, and/or schist Typical profile Oi - 0 to 2 inches: slightly decomposed plant material Custom Soil Resource Report 19 A - 2 to 5 inches: fine sandy loam Bw1 - 5 to 16 inches: fine sandy loam Bw2 - 16 to 22 inches: gravelly fine sandy loam 2C - 22 to 67 inches: gravelly loamy sand Properties and qualities Slope:3 to 15 percent Surface area covered with cobbles, stones or boulders:9.0 percent Depth to restrictive feature:19 to 39 inches to strongly contrasting textural stratification Drainage class:Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately low to high (0.14 to 14.17 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 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 Charlton, Extremely Stony Setting Landform:Ridges, ground moraines, hills Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Side slope, crest Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Coarse-loamy melt-out till derived from granite, gneiss, and/or schist Typical profile Oe - 0 to 2 inches: moderately decomposed plant material A - 2 to 4 inches: fine sandy loam Bw - 4 to 27 inches: gravelly fine sandy loam C - 27 to 65 inches: gravelly fine sandy loam Properties and qualities Slope:3 to 15 percent Surface area covered with cobbles, stones or boulders:9.0 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately low to high (0.14 to 14.17 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.7 inches) Custom Soil Resource Report 20 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 Leicester, extremely stony Percent of map unit:5 percent Landform:Hills, drainageways, depressions, ground moraines Landform position (two-dimensional):Toeslope, footslope Landform position (three-dimensional):Base slope Down-slope shape:Concave, linear Across-slope shape:Concave Hydric soil rating: Yes Sutton, extremely stony Percent of map unit:5 percent Landform:Ground moraines, hills Landform position (two-dimensional):Footslope Landform position (three-dimensional):Base slope Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Chatfield, extremely stony Percent of map unit:5 percent Landform:Ridges, hills Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Crest, side slope, nose slope Down-slope shape:Convex Across-slope shape:Linear, convex Hydric soil rating: No 73C—Charlton-Chatfield complex, 0 to 15 percent slopes, very rocky Map Unit Setting National map unit symbol: 2w698 Elevation: 0 to 1,550 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 140 to 240 days Farmland classification: Not prime farmland Map Unit Composition Charlton, very stony, and similar soils:50 percent Chatfield, very stony, and similar soils:30 percent Custom Soil Resource Report 21 Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Charlton, Very Stony Setting Landform:Ridges, hills Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Side slope, crest, nose slope Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Coarse-loamy melt-out till derived from granite, gneiss, and/or schist Typical profile Oe - 0 to 2 inches: moderately decomposed plant material A - 2 to 4 inches: fine sandy loam Bw - 4 to 27 inches: gravelly fine sandy loam C - 27 to 65 inches: gravelly fine sandy loam Properties and qualities Slope:3 to 15 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: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately low to high (0.14 to 14.17 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.7 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Ecological site: F144AY034CT - Well Drained Till Uplands Hydric soil rating: No Description of Chatfield, Very Stony Setting Landform:Hills, ridges Landform position (two-dimensional):Backslope, summit, shoulder Landform position (three-dimensional):Crest, side slope, nose slope Down-slope shape:Convex Across-slope shape:Linear, convex Parent material:Coarse-loamy melt-out till derived from granite, gneiss, and/or schist Typical profile Oi - 0 to 1 inches: slightly decomposed plant material A - 1 to 2 inches: fine sandy loam Bw - 2 to 30 inches: gravelly fine sandy loam 2R - 30 to 40 inches: bedrock Custom Soil Resource Report 22 Properties and qualities Slope:3 to 15 percent Surface area covered with cobbles, stones or boulders:1.6 percent Depth to restrictive feature:20 to 41 inches to lithic bedrock Drainage class:Well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat):Very low (0.00 to 0.00 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 4.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Ecological site: F144AY034CT - Well Drained Till Uplands Hydric soil rating: No Minor Components Sutton, very stony Percent of map unit:5 percent Landform:Ground moraines, hills Landform position (two-dimensional):Footslope Landform position (three-dimensional):Base slope Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Rock outcrop Percent of map unit:5 percent Hydric soil rating: No Hollis, very stony Percent of map unit:5 percent Landform:Hills, ridges Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Crest, side slope, nose slope Down-slope shape:Convex Across-slope shape:Linear, convex Hydric soil rating: No Leicester, very stony Percent of map unit:5 percent Landform:Drainageways, depressions Down-slope shape:Linear Across-slope shape:Concave Hydric soil rating: Yes Custom Soil Resource Report 23 75E—Hollis-Chatfield-Rock outcrop complex, 15 to 45 percent slopes Map Unit Setting National map unit symbol: 9lqp 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 Hollis and similar soils:35 percent Chatfield and similar soils:30 percent Rock outcrop:15 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Hollis Setting Landform:Ridges, hills Down-slope shape:Convex Across-slope shape:Convex Parent material: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 9 inches: channery fine sandy loam Bw2 - 9 to 15 inches: gravelly fine sandy loam 2R - 15 to 80 inches: bedrock Properties and qualities Slope:15 to 45 percent Surface area covered with cobbles, stones or boulders:9.0 percent Depth to restrictive feature:10 to 20 inches to lithic bedrock Drainage class:Somewhat excessively 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: Very low (about 1.8 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Custom Soil Resource Report 24 Hydrologic Soil Group: D Ecological site: F144AY033MA - Shallow Dry 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 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 Description of Rock Outcrop Typical profile R - 0 to 0 inches: bedrock Properties and qualities Slope:15 to 45 percent Depth to restrictive feature:0 inches to lithic bedrock Runoff class: Very high Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 8 Hydrologic Soil Group: D Hydric soil rating: Unranked Custom Soil Resource Report 25 Minor Components Charlton Percent of map unit:7 percent Landform:Hills Down-slope shape:Linear 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 Sutton, very stony Percent of map unit:5 percent Landform:Drainageways, depressions Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Unnamed, red parent material Percent of map unit:1 percent Hydric soil rating: No Unnamed, sandy subsoil Percent of map unit:1 percent Hydric soil rating: No Brimfield Percent of map unit:1 percent Landform:Ridges, hills Down-slope shape:Convex Across-slope shape:Convex Hydric soil rating: No 85B—Paxton and Montauk fine sandy loams, 3 to 8 percent slopes, very stony Map Unit Setting National map unit symbol: 2w679 Elevation: 0 to 1,530 feet Mean annual precipitation: 36 to 71 inches Mean annual air temperature: 39 to 55 degrees F Frost-free period: 145 to 240 days Farmland classification: Farmland of statewide importance Custom Soil Resource Report 26 Map Unit Composition Paxton, very stony, and similar soils:55 percent Montauk, very stony, and similar soils:30 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Paxton, Very Stony Setting Landform:Hills, ground moraines, drumlins Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Side slope, crest Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Coarse-loamy lodgment till derived from gneiss, granite, and/or schist Typical profile Oe - 0 to 2 inches: moderately decomposed plant material A - 2 to 10 inches: fine sandy loam Bw1 - 10 to 17 inches: fine sandy loam Bw2 - 17 to 28 inches: fine sandy loam Cd - 28 to 67 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 43 inches to densic material Drainage class:Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately low (0.00 to 0.14 in/hr) Depth to water table:About 18 to 37 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 4.8 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: C Ecological site: F144AY007CT - Well Drained Dense Till Uplands Hydric soil rating: No Description of Montauk, Very Stony Setting Landform:Recessionial moraines, ground moraines, hills, drumlins Landform position (two-dimensional):Backslope, shoulder, summit Landform position (three-dimensional):Side slope, crest Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Coarse-loamy over sandy lodgment till derived from gneiss, granite, and/or schist Custom Soil Resource Report 27 Typical profile Oe - 0 to 2 inches: moderately decomposed plant material A - 2 to 6 inches: fine sandy loam Bw1 - 6 to 28 inches: fine sandy loam Bw2 - 28 to 36 inches: sandy loam 2Cd - 36 to 74 inches: gravelly loamy sand 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 43 inches to densic material Drainage class:Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately high (0.00 to 1.42 in/hr) Depth to water table:About 18 to 37 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline (0.0 to 1.9 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 5.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: C Ecological site: F144AY007CT - Well Drained Dense Till Uplands Hydric soil rating: No Minor Components Woodbridge, very stony Percent of map unit:8 percent Landform:Ground moraines, hills, drumlins Landform position (two-dimensional):Backslope, footslope, summit Landform position (three-dimensional):Side slope, crest Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Charlton, very stony Percent of map unit:3 percent Landform:Hills Landform position (two-dimensional):Shoulder, summit, backslope Landform position (three-dimensional):Crest, side slope Down-slope shape:Convex Across-slope shape:Convex Hydric soil rating: No Ridgebury, very stony Percent of map unit:3 percent Landform:Drumlins, depressions, ground moraines, hills, drainageways Landform position (two-dimensional):Footslope, toeslope Landform position (three-dimensional):Base slope, head slope Down-slope shape:Concave Across-slope shape:Concave Hydric soil rating: Yes Custom Soil Resource Report 28 Stockbridge, very stony Percent of map unit:1 percent Landform:Hills Landform position (two-dimensional):Shoulder, backslope, summit Landform position (three-dimensional):Crest, side slope Down-slope shape:Concave Across-slope shape:Linear Hydric soil rating: No Custom Soil Resource Report 29 Appendix B HydroCAD Modeling Results DA-1 DA-1 DA-2 DA-2 CULVERT CULVERT WETLANDS WETLANDS Routing Diagram for Crickets Corner Pre Development Prepared by Boundaries, LLC, Printed 1/29/2025 HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Subcat Reach Pond Link Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 2HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 1.200 61 >75% Grass cover, Good, HSG B (DA-2) 0.270 98 Paved parking, HSG B (DA-2) 8.383 55 Woods, Good, HSG B (DA-1, DA-2) 2.268 77 Woods, Good, HSG D (DA-1, DA-2) 12.120 61 TOTAL AREA Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 3HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 9.852 HSG B DA-1, DA-2 0.000 HSG C 2.268 HSG D DA-1, DA-2 0.000 Other 12.120 TOTAL AREA Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 4HydroCAD® 10.20-6a s/n 04031 © 2024 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 1.200 0.000 0.000 0.000 1.200 >75% Grass cover, Good DA-2 0.000 0.270 0.000 0.000 0.000 0.270 Paved parking DA-2 0.000 8.383 0.000 2.268 0.000 10.650 Woods, Good DA-1, DA-2 0.000 9.852 0.000 2.268 0.000 12.120 TOTAL AREA NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 5HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Time span=0.00-48.00 hrs, dt=0.01 hrs, 4801 points x 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=89,038 sf 0.00% Impervious Runoff Depth=2.87"Subcatchment DA-1: DA-1 Flow Length=734' Tc=12.0 min CN=57 Runoff=5.57 cfs 0.490 af Runoff Area=438,906 sf 2.68% Impervious Runoff Depth=3.31"Subcatchment DA-2: DA-2 Flow Length=1,390' Tc=27.7 min CN=61 Runoff=20.55 cfs 2.778 af Inflow=20.55 cfs 2.778 afLink CULVERT: CULVERT Primary=20.55 cfs 2.778 af Inflow=5.57 cfs 0.490 afLink WETLANDS: WETLANDS Primary=5.57 cfs 0.490 af Total Runoff Area = 12.120 ac Runoff Volume = 3.267 af Average Runoff Depth = 3.23" 97.77% Pervious = 11.850 ac 2.23% Impervious = 0.270 ac NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 6HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment DA-1: DA-1 Runoff = 5.57 cfs @ 12.20 hrs, Volume= 0.490 af, Depth= 2.87" Routed to Link WETLANDS : WETLANDS Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA10 24-hr D 100-Year Rainfall=7.82" Area (sf) CN Description 80,422 55 Woods, Good, HSG B 8,616 77 Woods, Good, HSG D 89,038 57 Weighted Average 89,038 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 50 0.1760 0.17 Sheet Flow, Sheet Woods Woods: Light underbrush n= 0.400 P2= 3.45" 7.0 684 0.1070 1.64 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 12.0 734 Total Subcatchment DA-1: DA-1 Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)6543210NOAA10 24-hr D 100-Year Rainfall=7.82" Runoff Area=89,038 sf Runoff Volume=0.490 af Runoff Depth=2.87" Flow Length=734' Tc=12.0 min CN=57 5.57 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 7HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment DA-2: DA-2 Runoff = 20.55 cfs @ 12.40 hrs, Volume= 2.778 af, Depth= 3.31" Routed to Link CULVERT : CULVERT Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA10 24-hr D 100-Year Rainfall=7.82" Area (sf) CN Description 284,729 55 Woods, Good, HSG B 90,167 77 Woods, Good, HSG D 52,251 61 >75% Grass cover, Good, HSG B 11,759 98 Paved parking, HSG B 438,906 61 Weighted Average 427,147 97.32% Pervious Area 11,759 2.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 50 0.1480 0.16 Sheet Flow, Sheet Woods Woods: Light underbrush n= 0.400 P2= 3.45" 5.1 575 0.1410 1.88 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 2.5 145 0.0360 0.95 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 0.8 62 0.0350 1.31 Shallow Concentrated Flow, Shallow Grass Short Grass Pasture Kv= 7.0 fps 4.9 273 0.0340 0.92 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 9.1 285 0.0110 0.52 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 27.7 1,390 Total NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 8HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Subcatchment DA-2: DA-2 Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)23 22 21 20 19 18 17 16 15 14 13 12 11 109876543210 NOAA10 24-hr D 100-Year Rainfall=7.82" Runoff Area=438,906 sf Runoff Volume=2.778 af Runoff Depth=3.31" Flow Length=1,390' Tc=27.7 min CN=61 20.55 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 9HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Link CULVERT: CULVERT Inflow Area = 10.076 ac, 2.68% Impervious, Inflow Depth = 3.31" for 100-Year event Inflow = 20.55 cfs @ 12.40 hrs, Volume= 2.778 af Primary = 20.55 cfs @ 12.40 hrs, Volume= 2.778 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link CULVERT: CULVERT Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)23 22 21 20 19 18 17 16 15 14 13 12 11 109876543210 Inflow Area=10.076 ac 20.55 cfs 20.55 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Pre Development Printed 1/29/2025Prepared by Boundaries, LLC Page 10HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Link WETLANDS: WETLANDS Inflow Area = 2.044 ac, 0.00% Impervious, Inflow Depth = 2.87" for 100-Year event Inflow = 5.57 cfs @ 12.20 hrs, Volume= 0.490 af Primary = 5.57 cfs @ 12.20 hrs, Volume= 0.490 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link WETLANDS: WETLANDS Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)6543210Inflow Area=2.044 ac 5.57 cfs 5.57 cfs DA-1A DA-1A DA-1B DA-1B DA-2A DA-2A DA-2B DA-2B SWB-1 SWB-1 SWB-2 SWB-2 CULVERT CULVERT WETLANDS WETLANDS Routing Diagram for Crickets Corner Post Development Prepared by Boundaries, LLC, Printed 1/29/2025 HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Subcat Reach Pond Link Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 2HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 2.801 61 >75% Grass cover, Good, HSG B (DA-1A, DA-1B, DA-2A, DA-2B) 0.092 80 >75% Grass cover, Good, HSG D (DA-2A) 1.399 98 Paved parking, HSG B (DA-1A, DA-2A) 0.340 98 Water Surface, 0% imp, HSG B (DA-1A, DA-2A) 5.361 55 Woods, Good, HSG B (DA-1A, DA-1B, DA-2A, DA-2B) 2.131 77 Woods, Good, HSG D (DA-1A, DA-1B, DA-2A) 12.125 67 TOTAL AREA Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 3HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 9.902 HSG B DA-1A, DA-1B, DA-2A, DA-2B 0.000 HSG C 2.223 HSG D DA-1A, DA-1B, DA-2A 0.000 Other 12.125 TOTAL AREA Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 4HydroCAD® 10.20-6a s/n 04031 © 2024 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 2.801 0.000 0.092 0.000 2.893 >75% Grass cover, Good DA-1A, DA-1B, DA-2A, DA-2B 0.000 1.399 0.000 0.000 0.000 1.399 Paved parking DA-1A, DA-2A 0.000 0.340 0.000 0.000 0.000 0.340 Water Surface, 0% imp DA-1A, DA-2A 0.000 5.361 0.000 2.131 0.000 7.492 Woods, Good DA-1A, DA-1B, DA-2A, DA-2B 0.000 9.902 0.000 2.223 0.000 12.125 TOTAL AREA Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 5HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Pipe Listing (all nodes) Line# Node Number In-Invert (feet) Out-Invert (feet) Length (feet) Slope (ft/ft) n Width (inches) Diam/Height (inches) Inside-Fill (inches) Node Name 1 DA-1A 0.00 0.00 194.0 0.0130 0.011 0.0 12.0 0.0 2 DA-1A 0.00 0.00 62.0 0.1600 0.011 0.0 12.0 0.0 3 DA-2A 0.00 0.00 16.0 0.0810 0.011 0.0 12.0 0.0 4 DA-2A 0.00 0.00 21.0 0.0240 0.011 0.0 12.0 0.0 5 DA-2A 0.00 0.00 134.0 0.0150 0.011 0.0 15.0 0.0 6 SWB-1 159.50 158.50 33.0 0.0303 0.011 0.0 12.0 0.0 7 SWB-2 140.95 140.30 76.0 0.0086 0.011 0.0 15.0 0.0 NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 6HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Time span=0.00-48.00 hrs, dt=0.01 hrs, 4801 points x 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=90,943 sf 36.54% Impervious Runoff Depth=5.22"Subcatchment DA-1A: DA-1A Flow Length=813' Tc=10.2 min CN=78 Runoff=11.18 cfs 0.909 af Runoff Area=31,840 sf 0.00% Impervious Runoff Depth=2.87"Subcatchment DA-1B: DA-1B Flow Length=392' Tc=8.5 min CN=57 Runoff=2.31 cfs 0.175 af Runoff Area=174,936 sf 15.85% Impervious Runoff Depth=4.99"Subcatchment DA-2A: DA-2A Flow Length=1,021' Tc=13.5 min CN=76 Runoff=18.21 cfs 1.671 af Runoff Area=230,446 sf 0.00% Impervious Runoff Depth=2.77"Subcatchment DA-2B: DA-2B Flow Length=655' Tc=26.8 min CN=56 Runoff=8.94 cfs 1.220 af Peak Elev=161.08' Storage=14,788 cf Inflow=11.18 cfs 0.909 afPond SWB-1: SWB-1 Outflow=4.54 cfs 0.761 af Peak Elev=143.22' Storage=19,093 cf Inflow=18.21 cfs 1.671 afPond SWB-2: SWB-2 Outflow=10.10 cfs 1.553 af Inflow=19.00 cfs 2.773 afLink CULVERT: CULVERT Primary=19.00 cfs 2.773 af Inflow=5.41 cfs 0.936 afLink WETLANDS: WETLANDS Primary=5.41 cfs 0.936 af Total Runoff Area = 12.125 ac Runoff Volume = 3.976 af Average Runoff Depth = 3.93" 88.46% Pervious = 10.726 ac 11.54% Impervious = 1.399 ac NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 7HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment DA-1A: DA-1A Runoff = 11.18 cfs @ 12.18 hrs, Volume= 0.909 af, Depth= 5.22" Routed to Pond SWB-1 : SWB-1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA10 24-hr D 100-Year Rainfall=7.82" Area (sf) CN Description 9,337 55 Woods, Good, HSG B 4,940 77 Woods, Good, HSG D 36,540 61 >75% Grass cover, Good, HSG B 33,233 98 Paved parking, HSG B 6,893 98 Water Surface, 0% imp, HSG B 90,943 78 Weighted Average 57,710 63.46% Pervious Area 33,233 36.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 50 0.1760 0.17 Sheet Flow, Sheet Woods Woods: Light underbrush n= 0.400 P2= 3.45" 3.0 305 0.1140 1.69 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 1.7 202 0.0770 1.94 Shallow Concentrated Flow, Shallow Grass Short Grass Pasture Kv= 7.0 fps 0.5 194 0.0130 6.11 4.80 Pipe Channel, RCP_Round 12" 12.0" Round Area= 0.8 sf Perim= 3.1' r= 0.25' n= 0.011 Concrete pipe, straight & clean 0.0 62 0.1600 21.44 16.84 Pipe Channel, RCP_Round 12" 12.0" Round Area= 0.8 sf Perim= 3.1' r= 0.25' n= 0.011 Concrete pipe, straight & clean 10.2 813 Total NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 8HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Subcatchment DA-1A: DA-1A Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)12 11 109876543210 NOAA10 24-hr D 100-Year Rainfall=7.82" Runoff Area=90,943 sf Runoff Volume=0.909 af Runoff Depth=5.22" Flow Length=813' Tc=10.2 min CN=78 11.18 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 9HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment DA-1B: DA-1B Runoff = 2.31 cfs @ 12.16 hrs, Volume= 0.175 af, Depth= 2.87" Routed to Link WETLANDS : WETLANDS Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA10 24-hr D 100-Year Rainfall=7.82" Area (sf) CN Description 24,680 55 Woods, Good, HSG B 773 77 Woods, Good, HSG D 6,387 61 >75% Grass cover, Good, HSG B 31,840 57 Weighted Average 31,840 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.5 50 0.1360 0.15 Sheet Flow, Sheet Woods Woods: Light underbrush n= 0.400 P2= 3.45" 1.9 187 0.1080 1.64 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 0.7 105 0.1120 2.34 Shallow Concentrated Flow, Shallow Grass Short Grass Pasture Kv= 7.0 fps 0.4 50 0.1660 2.04 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 8.5 392 Total Subcatchment DA-1B: DA-1B Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)210NOAA10 24-hr D 100-Year Rainfall=7.82" Runoff Area=31,840 sf Runoff Volume=0.175 af Runoff Depth=2.87" Flow Length=392' Tc=8.5 min CN=57 2.31 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 10HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment DA-2A: DA-2A Runoff = 18.21 cfs @ 12.21 hrs, Volume= 1.671 af, Depth= 4.99" Routed to Pond SWB-2 : SWB-2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA10 24-hr D 100-Year Rainfall=7.82" Area (sf) CN Description 13,621 55 Woods, Good, HSG B 87,108 77 Woods, Good, HSG D 34,537 61 >75% Grass cover, Good, HSG B 4,029 80 >75% Grass cover, Good, HSG D 27,720 98 Paved parking, HSG B 7,921 98 Water Surface, 0% imp, HSG B 174,936 76 Weighted Average 147,216 84.15% Pervious Area 27,720 15.85% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 50 0.1480 0.16 Sheet Flow, Sheet Woods Woods: Light underbrush n= 0.400 P2= 3.45" 5.1 577 0.1400 1.87 Shallow Concentrated Flow, Shallow Woodland Woodland Kv= 5.0 fps 2.8 223 0.0350 1.31 Shallow Concentrated Flow, Shallow Grass Short Grass Pasture Kv= 7.0 fps 0.0 16 0.0810 15.26 11.98 Pipe Channel, RCP_Round 12" 12.0" Round Area= 0.8 sf Perim= 3.1' r= 0.25' n= 0.011 Concrete pipe, straight & clean 0.0 21 0.0240 8.31 6.52 Pipe Channel, RCP_Round 12" 12.0" Round Area= 0.8 sf Perim= 3.1' r= 0.25' n= 0.011 Concrete pipe, straight & clean 0.3 134 0.0150 7.62 9.35 Pipe Channel, RCP_Round 15" 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.011 Concrete pipe, straight & clean 13.5 1,021 Total NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 11HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Subcatchment DA-2A: DA-2A Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)20 19 18 17 16 15 14 13 12 11 109876543210 NOAA10 24-hr D 100-Year Rainfall=7.82" Runoff Area=174,936 sf Runoff Volume=1.671 af Runoff Depth=4.99" Flow Length=1,021' Tc=13.5 min CN=76 18.21 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 12HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment DA-2B: DA-2B Runoff = 8.94 cfs @ 12.39 hrs, Volume= 1.220 af, Depth= 2.77" Routed to Link CULVERT : CULVERT Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA10 24-hr D 100-Year Rainfall=7.82" Area (sf) CN Description 185,901 55 Woods, Good, HSG B 44,545 61 >75% Grass cover, Good, HSG B 230,446 56 Weighted Average 230,446 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 50 0.0020 0.06 Sheet Flow, Sheet Grass Grass: Short n= 0.150 P2= 3.45" 0.7 50 0.0280 1.17 Shallow Concentrated Flow, Shallow Grass Short Grass Pasture Kv= 7.0 fps 12.5 555 0.0220 0.74 Shallow Concentrated Flow, Shallow Woods Woodland Kv= 5.0 fps 26.8 655 Total Subcatchment DA-2B: DA-2B Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)109876543210 NOAA10 24-hr D 100-Year Rainfall=7.82" Runoff Area=230,446 sf Runoff Volume=1.220 af Runoff Depth=2.77" Flow Length=655' Tc=26.8 min CN=56 8.94 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 13HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Pond SWB-1: SWB-1 Inflow Area = 2.088 ac, 36.54% Impervious, Inflow Depth = 5.22" for 100-Year event Inflow = 11.18 cfs @ 12.18 hrs, Volume= 0.909 af Outflow = 4.54 cfs @ 12.34 hrs, Volume= 0.761 af, Atten= 59%, Lag= 10.0 min Primary = 4.54 cfs @ 12.34 hrs, Volume= 0.761 af Routed to Link WETLANDS : WETLANDS Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 161.08' @ 12.34 hrs Surf.Area= 10,214 sf Storage= 14,788 cf Plug-Flow detention time= 175.8 min calculated for 0.761 af (84% of inflow) Center-of-Mass det. time= 97.2 min ( 930.6 - 833.4 ) Volume Invert Avail.Storage Storage Description #1 156.00' 1,046 cf Forebay (Prismatic) Listed below (Recalc) #2 158.00' 3,143 cf Lower Basin (Prismatic) Listed below (Recalc) #3 159.00' 16,486 cf Upper Basin (Prismatic) Listed below (Recalc) 20,674 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 156.00 67 0 0 158.00 411 478 478 159.00 724 568 1,046 Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 158.00 2,808 0 0 159.00 3,477 3,143 3,143 Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 159.00 4,201 0 0 160.00 5,026 4,614 4,614 162.00 6,846 11,872 16,486 Device Routing Invert Outlet Devices #1 Primary 161.00'10.0' long x 8.0' breadth Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.43 2.54 2.70 2.69 2.68 2.68 2.66 2.64 2.64 2.64 2.65 2.65 2.66 2.66 2.68 2.70 2.74 #2 Primary 159.50'12.0" Round Culvert L= 33.0' RCP, end-section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 159.50' / 158.50' S= 0.0303 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight & clean, Flow Area= 0.79 sf Primary OutFlow Max=4.53 cfs @ 12.34 hrs HW=161.08' TW=0.00' (Dynamic Tailwater) 1=Spillway (Weir Controls 0.60 cfs @ 0.71 fps) 2=Culvert (Inlet Controls 3.94 cfs @ 5.01 fps) NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 14HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Pond SWB-1: SWB-1 Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)12 11 109876543210 Inflow Area=2.088 ac Peak Elev=161.08' Storage=14,788 cf 11.18 cfs 4.54 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 15HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Pond SWB-2: SWB-2 Inflow Area = 4.016 ac, 15.85% Impervious, Inflow Depth = 4.99" for 100-Year event Inflow = 18.21 cfs @ 12.21 hrs, Volume= 1.671 af Outflow = 10.10 cfs @ 12.36 hrs, Volume= 1.553 af, Atten= 45%, Lag= 9.0 min Primary = 10.10 cfs @ 12.36 hrs, Volume= 1.553 af Routed to Link CULVERT : CULVERT Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 143.22' @ 12.36 hrs Surf.Area= 12,422 sf Storage= 19,093 cf Plug-Flow detention time= 101.1 min calculated for 1.552 af (93% of inflow) Center-of-Mass det. time= 62.8 min ( 905.5 - 842.7 ) Volume Invert Avail.Storage Storage Description #1 138.00' 1,687 cf Forebay (Prismatic) Listed below (Recalc) #2 140.00' 3,668 cf Lower Basin (Prismatic) Listed below (Recalc) #3 141.00' 19,665 cf Upper Basin (Prismatic) Listed below (Recalc) 25,020 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 138.00 131 0 0 140.00 661 792 792 141.00 1,129 895 1,687 Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 140.00 3,272 0 0 141.00 4,064 3,668 3,668 Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 141.00 5,192 0 0 142.00 6,063 5,628 5,628 144.00 7,974 14,037 19,665 Device Routing Invert Outlet Devices #1 Primary 143.00'10.0' long x 8.0' breadth Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.43 2.54 2.70 2.69 2.68 2.68 2.66 2.64 2.64 2.64 2.65 2.65 2.66 2.66 2.68 2.70 2.74 #2 Primary 140.95'15.0" Round Culvert L= 76.0' CPP, end-section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 140.95' / 140.30' S= 0.0086 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight & clean, Flow Area= 1.23 sf Primary OutFlow Max=10.10 cfs @ 12.36 hrs HW=143.22' TW=0.00' (Dynamic Tailwater) 1=Spillway (Weir Controls 2.52 cfs @ 1.15 fps) 2=Culvert (Inlet Controls 7.58 cfs @ 6.18 fps) NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 16HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Pond SWB-2: SWB-2 Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)20 19 18 17 16 15 14 13 12 11 109876543210 Inflow Area=4.016 ac Peak Elev=143.22' Storage=19,093 cf 18.21 cfs 10.10 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 17HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Link CULVERT: CULVERT Inflow Area = 9.306 ac, 6.84% Impervious, Inflow Depth = 3.58" for 100-Year event Inflow = 19.00 cfs @ 12.37 hrs, Volume= 2.773 af Primary = 19.00 cfs @ 12.37 hrs, Volume= 2.773 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link CULVERT: CULVERT Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)21 20 19 18 17 16 15 14 13 12 11 109876543210 Inflow Area=9.306 ac 19.00 cfs 19.00 cfs NOAA10 24-hr D 100-Year Rainfall=7.82"Crickets Corner Post Development Printed 1/29/2025Prepared by Boundaries, LLC Page 18HydroCAD® 10.20-6a s/n 04031 © 2024 HydroCAD Software Solutions LLC Summary for Link WETLANDS: WETLANDS Inflow Area = 2.819 ac, 27.07% Impervious, Inflow Depth > 3.99" for 100-Year event Inflow = 5.41 cfs @ 12.19 hrs, Volume= 0.936 af Primary = 5.41 cfs @ 12.19 hrs, Volume= 0.936 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link WETLANDS: WETLANDS Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)6543210Inflow Area=2.819 ac 5.41 cfs 5.41 cfs Appendix C Supporting Calculations WATER QUALITY VOLUME DA-1 Coverage Area (SF)Area (Acres) Impervious 33,233 0.763 Grassland 42,927 0.985 Wooded 39,730 0.912 Water Surface 6,893 0.158 Total 122,783 2.819 Percent Impervious (I)27.066%Volumetric Runoff Coefficient (R)0.294 Water Quality Volume (WQV)3,905 Cubic Feet Sediment Forebay Required Storage 976 Cubic Feet DA-2 Coverage Area (SF)Area (Acres) Impervious 27,720 0.636 Grassland 83,111 1.908 Wooded 286,630 6.580 Water Surface 7,921 0.182 Total 405,382 9.306 Percent Impervious (I)6.838%Volumetric Runoff Coefficient (R)0.112 Water Quality Volume (WQV)4,899 Cubic Feet Sediment Forebay Required Storage 1,225 Cubic Feet Appendix D Watershed Maps ~~~~~~~~~~~~29BHSG B3HSG D62CHSG B73CHSG B75EHSG DDA-1DA-229BHSG B75EHSG D73CHSG B62CHSG B3HSG DRevisionsSHEET NO.1Appendix D "Pre-Development Conditions Watersheds" Prepared For Cricket's Corner, LLC 1645 Route 85 - Montville, ConnecticutFebruary 2025JOB I.D. NO.P:\CIVIL 3D PROJECTS\2024\24-3432 ROGER PHILLIPS\TECH\STORMWATER\FIGURES.DWG 24-3432DATE:SCALE:11" = 60'©2025 BOUNDARIES LLCTHIS DRAWING IS THE PROPERTY OF BOUNDARIES LLC AND HAS BEEN SPECIFICALLYPREPARED FOR THE OWNER OF THIS PROJECT, AT THIS SITE, AND IS NOT TO BEDUPLICATED OR USED IN PART OR WHOLE FOR ANY OTHER PURPOSE, PROJECT,LOCATION OR OWNER WITHOUT THE EXPRESSED WRITTEN CONSENT OFBOUNDARIES LLC. NOT VALID WITHOUT LIVE SIGNATURE AND EMBOSSED SEAL.GRAPHIC SCALEWATERSHED DATASub WatershedAreaDA-112.044 AcresDA-210.076 AcresSOILS LEGEND3Ridgebury, Leicester, and Whitman Soils, 0 - 8% Slopes, Extremely Stony29BAgawam Fine Sandy Loam, 3 - 8% Slopes62CCanton and Charlton Fine Sandy Loams, 3 - 15% Slopes, Extremely Stony73CCharlton - Chatfield Complex, 0 - 15% Slopes, Very Rocky73EHollis - Chatfield - Rock Outcrop Complex, 15 - 45% Slopes ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~29BHSG B3HSG D62CHSG B73CHSG B75EHSG DDA-2BDA-1BDA-2A29BHSG B75EHSG D73CHSG B62CHSG B3HSG DDA-1ARevisionsSHEET NO.1Appendix D "Post-Development Conditions Watersheds" Prepared For Cricket's Corner, LLC 1645 Route 85 - Montville, ConnecticutFebruary 2025JOB I.D. NO.P:\CIVIL 3D PROJECTS\2024\24-3432 ROGER PHILLIPS\TECH\STORMWATER\FIGURES.DWG 24-3432DATE:SCALE:11" = 60'©2025 BOUNDARIES LLCTHIS DRAWING IS THE PROPERTY OF BOUNDARIES LLC AND HAS BEEN SPECIFICALLYPREPARED FOR THE OWNER OF THIS PROJECT, AT THIS SITE, AND IS NOT TO BEDUPLICATED OR USED IN PART OR WHOLE FOR ANY OTHER PURPOSE, PROJECT,LOCATION OR OWNER WITHOUT THE EXPRESSED WRITTEN CONSENT OFBOUNDARIES LLC. NOT VALID WITHOUT LIVE SIGNATURE AND EMBOSSED SEAL.GRAPHIC SCALEWATERSHED DATASub WatershedAreaDA-1A2.088 AcresDA-1B0.731 AcresDA-2A4.016 AcresDA-2B5.290 AcresSOILS LEGEND3Ridgebury, Leicester, and Whitman Soils, 0 - 8% Slopes, Extremely Stony29BAgawam Fine Sandy Loam, 3 - 8% Slopes62CCanton and Charlton Fine Sandy Loams, 3 - 15% Slopes, Extremely Stony73CCharlton - Chatfield Complex, 0 - 15% Slopes, Very Rocky73EHollis - Chatfield - Rock Outcrop Complex, 15 - 45% Slopes