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Home My WebLink About25IWC29-New London Tpke-Hydrologic Soil Group Map Rec'd 1-15-2026Hydrologic Soil Group—State of Connecticut, Eastern Part Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/14/2026 Page 1 of 54597400459770045980004598300459860045989004599200459770045980004598300459860045989004599200740500740800741100741400741700742000742300742600742900743200 740500 740800 741100 741400 741700 742000 742300 742600 742900 743200 41° 30' 31'' N 72° 7' 10'' W41° 30' 31'' N72° 5' 5'' W41° 29' 30'' N 72° 7' 10'' W41° 29' 30'' N 72° 5' 5'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 18N WGS84 0 500 1000 2000 3000 Feet 0 150 300 600 900 Meters Map Scale: 1:13,300 if printed on A landscape (11" x 8.5") sheet. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:12,000. 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 6, Sep 16, 2025 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 14, 2022—Oct 6, 2022 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Hydrologic Soil Group—State of Connecticut, Eastern Part Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/14/2026 Page 2 of 5 Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 3 Ridgebury, Leicester, and Whitman soils, 0 to 8 percent slopes, extremely stony D 1.6 0.2% 13 Walpole sandy loam, 0 to 3 percent slopes B/D 2.1 0.3% 17 Timakwa and Natchaug soils, 0 to 2 percent slopes B/D 6.0 0.9% 23A Sudbury sandy loam, 0 to 5 percent slopes A/D 8.0 1.2% 29A Agawam fine sandy loam, 0 to 3 percent slopes B 14.7 2.1% 29B Agawam fine sandy loam, 3 to 8 percent slopes B 17.5 2.6% 34A Merrimac fine sandy loam, 0 to 3 percent slopes A 27.6 4.0% 34B Merrimac fine sandy loam, 3 to 8 percent slopes A 47.5 6.9% 34C Merrimac fine sandy loam, 8 to 15 percent slopes A 14.6 2.1% 38C Hinckley loamy sand, 3 to 15 percent slopes A 152.8 22.3% 38E Hinckley loamy sand, 15 to 45 percent slopes A 77.3 11.3% 51B Sutton fine sandy loam, 0 to 8 percent slopes, very stony B/D 10.3 1.5% 52C Sutton fine sandy loam, 2 to 15 percent slopes, extremely stony B/D 1.0 0.1% 60B Canton and Charlton fine sandy loams, 3 to 8 percent slopes B 42.7 6.2% 60C Canton and Charlton fine sandy loams, 8 to 15 percent slopes B 11.1 1.6% 60D Canton and Charlton soils, 15 to 25 percent slopes B 2.1 0.3% Hydrologic Soil Group—State of Connecticut, Eastern Part Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/14/2026 Page 3 of 5 Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 61B Canton and Charlton fine sandy loams, 0 to 8 percent slopes, very stony B 11.2 1.6% 61C Canton and Charlton fine sandy loams, 8 to 15 percent slopes, very stony B 14.9 2.2% 62C Canton and Charlton fine sandy loams, 3 to 15 percent slopes, extremely stony B 7.6 1.1% 62D Canton and Charlton fine sandy loams, 15 to 35 percent slopes, extremely stony B 29.8 4.4% 73C Charlton-Chatfield complex, 0 to 15 percent slopes, very rocky B 21.8 3.2% 73E Charlton-Chatfield complex, 15 to 45 percent slopes, very rocky B 12.4 1.8% 103 Rippowam fine sandy loam B/D 29.8 4.4% 305 Udorthents-Pits complex, gravelly C 12.8 1.9% 306 Udorthents-Urban land complex B 55.6 8.1% 307 Urban land D 12.5 1.8% 701A Ninigret fine sandy loam, 0 to 3 percent slopes B/D 6.0 0.9% 703B Haven silt loam, 3 to 8 percent slopes B 0.0 0.0% 918 Gales Ferry silt loam, subtidal D 19.8 2.9% 931 Anguilla sand, subtidal D 3.0 0.4% 997 Thames silt loam, subtidal D 9.7 1.4% W Water 0.8 0.1% Totals for Area of Interest 684.8 100.0% Hydrologic Soil Group—State of Connecticut, Eastern Part Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/14/2026 Page 4 of 5 Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—State of Connecticut, Eastern Part Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/14/2026 Page 5 of 5