DCPREZ-0000-07149 - Laserfiche WebLink

Home Browse Search

Inspection of erosion control measures will be on a weekly basis, or within 24 hours of a storm in excess of 0.5 inches. Written inspection forms will be retained on-site at all times and subject to inspection. Maintenance will likely concentrate on removing excess sediment from silt fences, repair and reinstallation of damaged fence, and reseeding of areas disturbed prior to germination. 2) Water Quality Management Included in the requirements of NR 216 is the need to match pre- and post-construction storm water flows. Accordingly, a detailed storm water plan will be developed for the project. The salient features of the plan include a 0.35-acre wet detention pond within the eastern cul-de-sac, with a piped outfall discharging to the northeast edge of Wetland Area 2, within the fill removal area. The ditch lines of the access road will be used to collect and convey storm water drainage from within the parcel to the wet detention pond, which will function as a sediment trap and polishing chamber for storm water prior to discharge to the receiving wetlands. The removal of existing fill from the central area of Wetland Area 2, combined with excavation of a small intervening upland area between the middle and southern portions of Wetland Area 2, is expected to considerably enhance the storage and filtration functions of the wetland complex. In addition to meeting the requirements of NR 216, this proposal will also provide significant benefits to local amphibian populations by providing additional habitat, while exploiting the mechanical filtration capabilities of the existing reed canary grass meadows. 3. Project Wetlands A. Wetland Delineation Wetlands were delineated in May and June of 1997, by Perry Rossa of Mead &Hunt, Inc. The "Routine Onsite Methodology" of the 1987 Corps of Engineers Manual was used to establish upland and wetland field conditions and the boundaries flagged and surveyed. The following data sources were checked prior to and during the course of field work: • Dane County Soils Survey, 1972 • Wisconsin Department of Natural Resources wetland map, T8N R10E, August 11, 1986. • U.S. Geological Survey topographic map, De Forest, Wisconsin, Scale 1:24000, 1983. • Topographic map, Scale 1:1200, Carley Parcel, no date. A total of 8.84 acres of wetlands were delineated on the 71.26-acre parcel, and are described in detail below. Wetland maps and data forms are included in the enclosures. Mead &Hunt C236A002\C236-97A\12-97 5