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<br />~ /1",fµ,(/~~fC'¿: é;r~, <br /> <br />. <br /> <br />,P .t.A""IVr-V& <br />Van Sickle, Allen & Associates <br />4969 Olson Memorial Highway' Minneapolis, MN 55422 <br />(612) 541-9804 Fax (612) 542-1405 <br /> <br />A¿.¿: \ þ <br />J~~l <br /> <br />October 28, 1994 <br /> <br />Mr. Lon P. Aune <br />City of Roseville <br />2660 Civic Center Drive <br />Roseville, MN 55113 <br /> <br />RE: Space Center/Beltmann <br />Roseville, MN <br />VAA Carom. No. 94088 <br /> <br />Dear Lon: <br /> <br />The following lists our findings regarding the stormwater <br />runoff into the city right-of-way. The supporting <br />calculation is also attached. <br /> <br />1. Based on the site topography, the runoff into the city <br />R.O.W. is estimated to be 6.40 cfs for the existing <br />site, assuming a design storm of 10 yr, 30 min. (i = <br />3.3 inch/hour). This is based on an existing <br />impervious area of 0.94 acres and an existing turf area <br />of 2.98 acres. <br /> <br />2. After the site is developed, the stormwater runoff into <br />the city R.O.W. is estimated to be 10.33 cfs which <br />includes a portion of the roof area. This is based on <br />a proposed impervious area of 2.94 acres and a proposed <br />turf area of 0.96 acres. <br /> <br />3. The runoff on the rest of the site will be directed <br />into the MNDOT R.O.W. as previously discussed. <br /> <br />If you have any questions, please don't hesitate to call. <br /> <br />Sincerely, <br />VAN SICKLE, ALLEN & ASSOCIATES, INC. <br /> <br /> <br />Ji?¡~ k:. <br />Design Engineer <br />Enclosure: Calculation <br /> <br />JL/Þr <br />1027aun.doc <br /> <br />xc: Anthony Pini - VAA <br /> <br />-----,..--------.-,---...--..-.-.._...........- <br />