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uai uji as 111 r;l SEA ST. PAUL tt 002/002 <br /> ,dirSeri <br /> MEMORANIUM <br /> PAUL.MN 0 MINNEAPOLIS,MN 0 ST.CLOUD,MN U CHIPPEWA FALLS WI aflOISON,WV <br /> TO: Paul Harrington,City of Mounds View <br /> FROM: Rocky J.Keehn,Water Resources Engineer <br /> DATE: August 3, 1995 <br /> RE: Mounds View,Minnesota <br /> Review of Hydrologic Calculations and Master Drainage Plan <br /> for Bridges Technology Center <br /> SEH No.A-MOUND9601.00 <br /> We have reviewed the information sent to us by Clark Engineering. On July 24, 199S,wes, ut a <br /> letter to Mark Murlowski describing the information that would be needed for SEH to complete a <br /> review of the project. Clark Engineering has submitted for review all the necessary Infos shoo,as <br /> described in the July 24 letter. <br /> All the hydrologic and water quality calculations submitted appear to accurately model the <br /> drainage system. The only item that can not be accurately reviewed is the ponding areas for flood <br /> storage. An estimate of the final grading contours in the wetland area would provide this <br /> information. This data can be presented at the Council work session. <br /> Clark engineering recommends that two water quality ponds should be constructed as part of the <br /> master drainage plan. Based on the wetland delineation and current wetland regulation limiting <br /> construction in wetlands, the two pond plan would be the most feasible. The pond for Lot 1 will <br /> reduce the buildable land,but appears not to adversely impact potential development. <br /> Based on our preliminary review,we recommend moving Pond 2 which is for Lot 1. It appears that <br /> the pond as shown will eliminate the high area next to the ditch. This will reduce or eliminate the <br /> possibility of a trail through the area. It appears that the pond would fit better if it is moved south <br /> which would put the pond closer to the wetland and make it blend in with the surrounding <br /> wetlands. <br /> Information needed for final review and final recommendation are: <br /> Additional contour information to verify 100-year ponding area <br /> Review of Pond 2 location to assure it does not adversely impact the City's recreational use <br /> plans <br /> Since these are minor items,they can be presented at the work session. At that time,I can give my <br /> final recommendation. Please call me at 490-2026 if you have any questions. <br /> tlo <br />