Agenda Packets - 1998/12/07 - Laserfiche WebLink

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,58,1 MEMORANDUM 3535 VADNAIS CENTER DRIVE,200 SEH CENTER,ST.PAUL,MN 55110-5118 612 490-2000 800 325-2055 612 490-2150 FAX TO: Rick Jopke,Mounds View Community Development Director FROM: Rocky Keehn, SEH DATE: December 3, 1998 RE: Ponding as part of Edgewood Drive Reconstruction During the realignment of Edgewood Drive a portion of City Property will be isolated from City Hall and will be available to be used for alternative uses. We are proposing that this area be considered for a regional storm water quantity and quality pond. This concept is consistent with the concept outlined in the Local Water Management Plan and as part of previous drainage studies. In May of 1996 during the preliminary design of Bronson Drive storm sewer system,the need for a ponding area in this location was discussed in a letter to the City. Attached for your information is a copy of the letter which provides background on the ponding previously discussed in this location. The need for a pond still exists;however,the location has changed with the realignment of Edgewood Drive. If a pond is constructed at the intersection of Edgewood Drive and Highway 10, it will treat storm water from the City Hall,Edgewood Drive,Bronson Drive and Woodlawn Drive. In total over 100 acres of drainage area could be treated at this site. Currently all storm water from this drainage area goes untreated directly to Rice Creek via the storm sewer system. The other benefit of a pond in this location is it will reduce storm water discharges to the downstream storm sewer system. This will provide more protection to the Edgewood Drive residents located on the west side of Highway 10. The protection is provided by ponding water in the proposed pond and adjacent wetland and not in the street as it does now. A pond located near the existing intersection of Highway 10 and Edgewood Drive is ideal. Since the existing storm sewer system from Bronson Drive and down Edgewood Drive crosses Highway 10 at this location,the existing storm sewer can be easily altered to drain into the pond. There will be no additional storm sewer pipe required for a pond in this location. Also,this pond can provide treatment for any future develop next to Edgewood Drive. Even if the regional pond is not constructed, it is our opinion that Rice Creek Watershed will recommended or may even require a water quality pond for the relocation of Edgewood Drive and the reconstruction of the City parking lot. This assumption is based on the fact that any new development will drain into a storm sewer system which discharges directly into Rice Creek without any treatment. An Affirmative Action, Equal Opportunity Employer