Agenda Packets - 1998/04/27 - Laserfiche WebLink

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MEMORANDUM ■ST.PAUL,MN O MINNEAPOLIS, MN O Sr.CLOUD, MN 0 CHIPP6WAFALLS,WI o MADISON,WI p LAKE COMM'.IN TO: Jim Ericson, City of Mounds View FROM; Rocky J. Keehn DATE: April 13, 1998 RE: Anthony Properties Management,Inc./Louise O'Neil Planning Case 471-97 SEH File No.A-MOUND9701.00(Pocket File 80.03) We have completed a review of the above referenced project. Based on our review it is recommended that the City storm sewer system be eliminated from the site plan (42-inch EQ. RCP, and connecting pipes). Since the developer's system cannot be connected to the City system, the dual storm sewers are a system which is not cost effective for the City to have constructed_ If the dual system is replaced with one storm sewer system,over 8 feet of head(water ponding)would need to be developed in the manhole located on the existing storm sewer system on the east side of the project. This could cause problems with the upstream storm sewer system. In the future, a larger storm sewer system in H2 would be more cost effective. This system can use the existing storm sewer system in Irondale Road,wetland on the west side of the proposed project and tie into the drainage system on Long Lake Road to reduce the cost of construction. Recent wetland regulation and Rice Creek Watershed District requirements have made the originally proposed storm sewer project in the Anthony Properties unfeasible. In the original plan,the storm water from Anthony Properties was going to be treated at a pond in the southwest corner of Long Lake Road and H,2. With the stricter ponding requirements,this site would not be large enough. The developer tried to make the proposed system work(at our request)by using a dual system,but in reviewing the information it is apparent that this is not the best alternative for the City. The wetland buffer will be an issue since the site has building within the 100 foot protection area. Natural vegetation and buffer strip easements should be obtained. With the sediment ponds and easements,the construction in the buffer area will be mitigated. Our recommendations are: Eliminate the City based storm sewer system on the property r Obtain an Easement in the wetland buffer area of at least 10 feet from the wetland. if you have any other questions please call be at 490-2026. RJK/rjk 51WATER ANON ECIBROCKYNINNUMOSWOUNDVWJE1 e0021 MHIA saNI1lOw EEE HaS 05TZ 061 ZT9 %y3 Ce.TZ N1S 66/ZT/10