Limited Phase 1 Environmental Site Assessment - Scott County

LcD2LcBLcB2LcC2TcBWaAWbLester loam, 12 to 18 percent slopes, moderately erodedLester loam, 2 to 6 percent slopesLester loam, 2 to 6 percent slopes, moderately erodedLester loam, 6 to 12 percent slopes, moderately erodedTerril loam, 2 to 6 percent slopesWaukegan silt loam, 0 to 2 percent slopesWebster-Glencoe silty clay loamsBedrock: The uppermost bedrock layer beneath the project site is the Prairie du Chien group, afinely crystalline dolostone, sandstone and shale formation. The Prairie du Chien is approximately 50-100 feet below the unconsolidated material and is approximately 140-190 feet thick. Please seeFigure 4 Bedrock Geology.Groundwater: The groundwater beneath the site is from the Prairie du Chien aquifer and flows northtoward the Minnesota River.Well Record Review & Wellhead Protection Areas:The project site is located in a Shakopee Municipal Wellhead Protection Area. Well records from theMinnesota Department of Health (MDH) County Well Index (CWI) and the Scott County GeologicAtlas Well Database were reviewed. The Scott County Geologic Atlas Well Database is a databaseof well records collected and interpreted by Minnesota Geological Survey (MGS) for the creation ofthe Scott County Geologic Atlas. Please review Appendix B Figure 1 Minnesota Department ofHealth Wells and Appendix B Figure 2 Scott County Well Database for well information anddescriptions found in the MDH CWI and County Well Database. The County and MDH CWI provideinformation on individual wells but not the exact location of the well on the property. The well figuresprovide a general location of the well on the property, the well point on the map does not show theexact location of the well. Although we do not know the exact well locations, often they are located bythe home. After reviewing the road construction limits from the CH17 and TH 13 Corridor StudyConstruction Limit Map it appears that the well at 2231 Marschall Ave is within the construction limits.Please see Figure 5 for the proposed construction limits. CH17 and Trunk Highway 13 CorridorStudy Construction Limit Map propose total acquisition of the property.Septic system locations:The septic system locations for homes with property within the construction limits were reviewed.Scott County Environmental Health Department has information on some of the septic systemlocations along the road corridor. It appears that the septic system at 1460 Valley View Drive and2088 Marschall Road are within the proposed construction limits. It appears that the septic systemsat 1447 Chateau Ave, 2020 Marschall Rd, 1400 and 1401 Wood Duck Trl, and 1400 Blue Heron areoutside of the proposed construction limit, but are close. There are homes that have part of theproperty within the construction limits; but Scott County Environmental Health does not haveinformation on these septic systems: 1830, 1834, 2231, 2355, and 2401 Marschall Road. The septicsystems at 514 and 614 Co Rd 78 are close to the road, but this section of road is not shown on theconstruction limits map.Floodplain:Federal Emergency Management Agency (FEMA) maps were reviewed. The road improvement areais not within the 100’ floodplain.7