11/28/2007 Env Bd Packet - Laserfiche WebLink

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• Silt fence must be properly installed and maintained when the fence becomes 1/3 full. Natural Resource Inventory A tree inventory is included on Attachment 2. A tree preservation plan has not been submitted and must be submitted before any allowed soil disturbance. Requirements for the tree preservation plan are listed in the City zoning code. There are no National Heritage concerns on this property for threatened, rare and endangered plants or animals. Flood plain is extensive on these parcels. Metro Land Survey details (Attachment 3) lists the OHW (Ordinary High Water) for these lots as 887.6. A source of this information should be stated for Wards Lake. The OHW for Reshaneau Lake is 883.5. The OHW for Wards Lake needs to be verified. The Wetlands for the site have been delineated and accepted by the Rice Creek Watershed District. 411, Watershed Issues • An issue that was addressed in previous review of the site when the island was part of the proposed development is ground water sensitivity. Any surface water treatment pond, biofiltration, rain garden or filtration type of pond must have at least 3 feet of sand separation between the bottom of the proposed pond and the seasonally high water table. The soil borings indicate that seasonal high ground water is within 2 feet of the surface on tested parts of the site. Therefore, the bottom of the treatment pond proposed must be at least three feet above stained soil layers. Stained or mottled soil is an indication of water presence at the mottled levels. Location and elevations of the treatment pond must be built with a verified OHW and ground water elevation. This site should be designed with a treatment train approach to surface water. All provisions of the Shoreland Overlay District must be enforced. Unique resources Vegetation: No known or expected. Wildlife: No known on this site.