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<br /> 6/~7c!i! ~d ., <br /> } <br /> -4 ~ <br /> . ,> <br /> SHH SHORT-ELlIOTT-HENDRICKSO~ l;:k' ~1!.. <br /> CONSULTING ENGINEERS~~ U~LU4> <br /> . ST, PAUL, MINNESOTA . CHIPPEWA FALLS, WISCONSIN ~. ,,-} <br /> ,> <br /> June 6, 1979 RE: ARDEN HILLS, MINNESOTA <br /> GLENVIEW AVENUE STORM SEWER <br /> OUR FILE NO. 69010 <br /> J Arden Hills City Council <br /> 1450 West Highway 96 <br /> Arden Hills, Minnesota 55112 <br /> Pursuant to your request we have investigated the storm sewer <br /> on Glenview Avenue, particularly in the vicinity of the inter- <br /> section of Glenview Avenue and Glenview Court. This investigation <br /> was initiated by the Council at the request of the Caniffs, whose <br /> property is located in the northeast portion of the above refer- <br /> enced intersection. <br /> . The storm sewer system we investigated is illustrated on the <br /> attached sketch. The Glenview Avenue storm sewer was constructed <br /> in the early 1960s under a street improvement program. with <br /> the exception of the 18" corrugated metal pipe at the outlet <br /> in Valentine Park, the remaining portions of the storm sewer <br /> system consist of reinforced concrete pipe. <br /> Generally, the storm sewer has the capacity to carry runoff <br /> from a storm with a 5 year average frequency. The capacity of <br /> the 18" corrugated metal pipe (CMP) may be deficient and <br /> cannot be determined because its connection point with the 24" <br /> pipe is buried. <br /> Apparently the capacity of subject storm sewer was exceeded <br /> during the heavy rains of last summer. Since these rains may <br /> have been greater than the 5 year average frequency storm, <br /> the capacity of the storm sewers was probably exceeded and <br /> excessive drainage ponded in the low point on Glenview Avenue. <br /> The low point is on Glenview Avenue just north of Glenview <br /> Court. The ponded water apparently reached an elevation that <br /> caused the surface drainage to flow easterly across the Caniff <br /> property. <br /> Some relief of the drainage problem may be achieved by replacing <br /> the 18" CMP with a pipe that has the capacity equal to the <br /> . adjoining 24" concrete pipe. However, this replacement will <br /> 200 HILLSBOROUCH OFFICE BLOC' 2353 RICE STREET' ST. PAUL, MINNESOTA SS113' PHONE (612) 484-0272 <br />