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• <br /> -sal• MEMORANDUM <br /> • ST.PAUL,MN ❑ MINNEAPOLIS,MN a ST CLOUD.MN C CHIPPEWA FALLS, WI ❑ MADISON, WI <br /> TO: Pamela Sheldon, City of Mounds View <br /> / <br /> FROM: Rocky Keehn t/ <br /> DATE: May 22, 1997 <br /> RE: Mounds View, Minnesota <br /> Review of PUD for Silver Lake Road and Highway 10 <br /> SEH No. A-MOUND9701.00 <br /> The PUD area is located in the southeast corner of T.H. Highway 10 and Silver Lake Road. The <br /> developer completed a preliminary layout of a proposed development for the City to review. As part <br /> of the site plan, there was a proposed Service Station, Condo Building, Restaurant, and Office <br /> Building (see attached figure). Besides the building areas, the developer proposed two sediment <br /> • ponds. One was located in the east end of the property(east pond) and the other in middle of the site <br /> (central pond). Also part of the site plan is an existing office building and wetland. <br /> There are four aspects of the project that were reviewed. They were: the wetland protection <br /> measures presented, wetland buffer requirements, internal drainage and impacts to the current water <br /> elevations in the adjacent wetland. <br /> General Comments <br /> The calculations sent to us for review did not take into account the existing office building. This <br /> building's runoff would need to be added to any calculations for the ponding requirements. Also, <br /> the site is a DNR protected waters (62-258 W). Since this is a DNR protected waters, an additional <br /> permit and other construction restriction will be required. The developer should also request that <br /> the DNR determine an Ordinary Highwater (OHW) for the site. The OHW should then be shown <br /> on any future development plans. <br /> Wetland Protection <br /> The site plan presented for the PUD contains two locations for a NURP or sediment pond (the <br /> developer's engineer used NERP which is incorrect). We feel that the east pond is not feasible. In <br /> order for the stormwater to reach the east pond from the site, a ditch or pipe must be installed. If it <br /> is piped, the existing culvert under Highway 10 would be blocked. If it is ditched, water from the <br /> Highway 10 culvert will also be diverted to the treatment pond. The pond would need to be sized <br /> • to accommodate drainage from an additional 26 acres. With the additional 26 acres, the proposed <br /> pond is more than likely too small. Also,the conveyance system, whether it be ditch or piped,would <br />