08/25/2021 EB Packet - Laserfiche WebLink

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Soils SSURGO (Soil Survey Geographic Database from Natural Resource Conservation Service) soils data indicates the presence of the following soil types: Cut and fill land (31%); Hayden fine sandy loam with 6-12% slopes, eroded (28.9%); marsh (9.5%); Kingsley fine sandy loam with 2-6% slopes (6.7%); Dundas loam (6.4%); Cathro muck (5.8%); Kingsley fine sandy loam with 12-18% slopes (5.5%); Hayden fine sandy loam (3.5%); and water (2.6%). The northeast portion of the site is Hayden fine sandy loam (hydrologic group B), Kingsley fine sandy loam (hydrologic group C), Dundas loam (hydrologic group B/D), Cathro muck (hydrologic group B/D), and marsh (hydrologic group A/D). Group B and C soils have moderate to slow rates of infiltration and water transmission. The southwest portion of the site is primarily cut and fill land and marsh. The soil properties such as infiltration rates and runoff potential are indeterminate for cut and fill areas. Per the Geotechnical Exploration Report, twenty-two soil borings were conducted for this site. 18 of the borings encountered top soil from depths of 3-19 inches. No topsoil was encountered in the borings for the cut and fill area. Groundwater was encountered in I I of the borings at depths of 4-19'. The other I I borings did not encounter groundwater. Land Cover Pre -settlement land cover (Marschner) was oak openings and barrens in the east portion of the site and wet prairie in the west. Current land cover (Minnesota Land Cover Classification System) is (from northeast to southwest): altered/non-native deciduous woodland, aspen forest in saturated soils, short grasses and mixed trees with 26-50% impervious surface, grassland with sparse deciduous trees, medium -tall grassland, oak forest, cattail marsh - semi -permanently flooded, cattail marsh seasonally flooded, lowland hardwood forest, aspen woodland, upland deciduous woodland, mixed hardwood swamp — seasonally flooded, altered/non- native deciduous woodland, floodplain forest, and palustrine open water. Rare, Unique or Significant Resources Water willow (Decodon verticillatus), a MN DNR listed species of Special Concern, has been identified on site, per the wetland delineation report performed by Midwest Natural Resources. It occurs on undisturbed lakeshores. Conservation of this species depends on avoiding physical alterations of shoreline and preserving native plant buffers. Amelia Lake is a 195-acre lake of biological significance (MN DNR). It flows to Wilkinson Lake and then to East Vadnais Lake. 2