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INTRODUCTION <br /> Background <br /> Flooding problems within the Edgewood Drainage District ( shown on <br /> Drawing No. 1 ) have proven the inadequacy of the storm drainage <br /> system that serves the area. These problems were first addressed <br /> in 1976 by Short-Elliott-Hendrickson, Inc. (SEH) and later in <br /> 1984 by John Johnson as part of the storm sewer studies for the <br /> entire city. The most significant problem is the flooding of the <br /> intersection of Long Lake Road and Ridge Lane. The need to <br /> address this problem, along with several other minor issues, lead <br /> to the development of this report. <br /> In the summer of 1987, City staff proposed that a new storm sewer <br /> line be constructed from this intersection which would tie into a <br /> line being constructed jointly by New Brighton and Ramsey County <br /> along County Road H. This new storm sewer would be built in <br /> conjunction with the reconstruction of Long Lake Road north of <br /> County Road H. The new line would connect to County Road H at <br /> Irondale Road. It was intended that the City of Mounds View <br /> enter into an agreement with New Brighton, who owns the County <br /> Road H storm sewer, for oversizing of the pipe to accept the <br /> additional flow from Mounds View. <br /> As a result of the proposed oversizing, SEH was asked to <br /> determine the increase in pipe capacity required to handle this <br /> additional flow. The initial investigation by SEH concluded that <br /> the connection was not necessary. The study found that the storm <br /> sewer beginning at the intersection of Irondale Road and <br /> Woodcrest Drive had enough capacity to handle an additional 20 <br /> cfs from an upstream storm sewer. Within the district were <br /> several wetland areas. It was felt that the 100-year storm could <br /> be adequately detained by maximizing use of the wetlands. <br /> - 1 - <br />