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Mounds View Planning Commission June 7, 2000 Regular Meeting Page 12 Planning Associate Ericson stated that staff has seen a draft drainage plan, which encompasses the entire site, and this has been forwarded to the City Engineer for further review to determine what the specifications and requirements would be for an expanded storm water pond, which would be located at the southern end of the Midland Videen property. He explained that the storm sewer , which is currently located under Edgewood Drive, would be re-routed to the north or south of the buildings, and would cross the wetland area. He stated that the storm sewer would drain into the proposed storm water pond, which would take in all of the runoff from the Walgreens, Culver’s, and City Hall, as well as all of the runoff that comes down Edgewood Drive. Planning Associate Ericson stated that all of the runoff from Edgewood Drive currently drains directly underneath Highway 10, and there is no treatment for this water. He indicated it is proposed that all of that storm water would be routed to the storm water holding pond, where the sediments would have the opportunity to fall out, and the water would purify. He stated that there would be an outlet, which would feed back into a storm sewer that runs parallel to the Highway 10 right-of-way, and this would connect to the storm sewer runs underneath Highway 10. Planning Associate Ericson stated that they were uncertain regarding the size of the storm water pond, however, it would create an opportunity for all of the runoff to be treated, and it would also be beneficial in terms of reducing the potential for downstream flooding, as the size of the storm water sewer in County Road H2 is not adequate to handle all of the volume which runs down Edgewood Drive. He advised that this would provide a place for the storm water to cleanse itself and feed into the wetland area in a much cleaner state, and it would provide an overall regional surface water management benefit as well. Planning Associate Ericson stated that the City Engineer is currently considering an appropriate size for the pond in order to accommodate the volume of flow, and the best location for the storm sewer to cross into the pond. He stated that the elevations appear to be acceptable, in that the flow could reach the new pond, exit the pond, and be diverted back underneath Highway 10. He advised that all of the elevations of contour appear to support this, and this is simply a matter of determining the most appropriate location of the storm sewers. Community Development Director Jopke stated that staff has requested the City Engineer examine this issue and come forward with the best scheme to address the regional watershed drainage that is called for in the Local Water Management Plan. He indicated this concept was presented to the developer, and is in the process of being fine-tuned at this point. He explained that City staff has been involved in this process, and the City Engineer has also had conversations with the Rice Creek Watershed District in this regard. Commissioner Thomas inquired if altering the flow of runoff through the area would affect the residential properties. Community Development Director Jopke stated that the intent was that there be a positive affect on overall drainage, as the runoff in this area and downstream would be