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15. Water Surface Use. Will the project change the number or type of watercraft on any water body? Yes ~ No If yes, indicate the current and projected watercraft usage and discuss any potential overcrowding or conflicts with other users or fish and wildlife resources. 16. Soils. Approximate depth (in feet) to: Groundwater: Bedrock: P,erched water: minimum.: minimum.: minimum.: 40 NA 10 feet average: average: average: 45 100 20 feet Describe the soils on the site, giving SCS classifications, if known. (SCS interpretations and soil boring logs need not be attached.) Four or more feet of silty to clayey sand to lean clay fill over glacial deposits consisting of alternating layers of till Ooamy sand to clay) and alluvium (silt, clay or sand). Due to the high clay content in the soil, up to 17 feet of soil will need to be excavated on the north parcel and U]p to 6 feet will need to be excavated from the south parcel. Excavated areas will be filled with suitable soil for construction. 17. Erosion and Sedimentation. Give the acreage to be graded or excavated and the Clllbic yards of soil to be moved: acres aoorox. 28 ; cubic yards aoorox. 68.000 cubic vards Describe any steep slopes or highly erodible soils and identify them on the site map. Describe the erosion and sedimentation measures to be used during and after construction of the project. Except near the wetland and on the slopes of the stormwater treatment ponds, the graded site slopes are expected to be less than 10 percent. All graded areas will eventually be impervious surface (buildings or roads), sodded, or in the case of the treatment ponds and created wetlands, restored to a natural condition. An on-site storm sewer system will convey storm flows to the treatment ponds, and then off the site to minimize concentrated overland flows. Storm sewer outfalls will be protected with riprap. An erosion control plan will be prepared as part of the construction plans for this site. The plan will meet the requirements necessary to obtain a National Pollutant Discharge Elimination System (NPDES) permit, and Rice Creek Watershed District approval for construction activities. Prior to the start of construction, a silt fence and/or staked hay bales will be installed around the perimeter of the site at locations where sediment could leave the site or enter water bodies. All graded slopes of 3H:1V or greater will be protected with erosion control blankets. Best management practice (BMP) erosion and sediment controls, such as rock filter dikes, will be placed at site access locations. Storm sewer inlets will be surrounded \'lith silt fences or hay bales to prevent sediment from entering the storm sewer system. 23624ISS \48185-1Il'MN 8