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<br />E~/tl &/'1 ~ <br /> <br />. <br /> <br />January 25, 2002 <br /> <br />Mr. Paul Palzer <br />City of Centerville <br />1880 Main Street <br />Centerville, MN 55038 <br /> <br />RE: Clear Water Meadows Swale <br />File No. 616-GEN <br /> <br />Dear Paul, <br /> <br />Per your request we have investigated the swale in !he back yards.of Brian Court in !he Clear <br />Water Meadows Addition. If a culvert is installed the following recommendations are made for <br />your consideration. <br /> <br />1. The home at 7016 Brian Court is !he controlling factor of the swales emergency <br />overflow elevation. This will require the fill above the culvert to remain a <br />minimum 1.5 feet lower than !he walk out elevation at 7016 Brian Court. Also a <br />1.5' minimum cover of soil over the top of the pipe is necessary. <br /> <br />2. The minimum required culvert size should be a 12" HDPE culvert installed at 1 % <br />grade and placed at !he existing elevation of the swale. A flatter sloped culvert <br />will require a 15" diameter pipe. <br /> <br />3. The city should inspect the two items listed above, upon completion of the culvert <br />installation and filling of the swale. <br /> <br />Please call me at 651-604-4808 if there are any questions or concerns. <br /> <br />Very truly yours, <br />BONESTROO, ROSENE, ANDERUK & ASSOCIATES, INC. <br /> <br />Daniel S. Schluender <br /> <br />cc: Tom Peterson <br />