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<br />~SUNDE <br />ENGINEERING, INC. <br /> <br />9001 E. Bloomington Freeway· Bloomington, MN 55420 <br />(612) 881-3344 ~ FAX (612) 881-1913 <br /> <br />March 22, 1994 <br /> <br />Mr. Jerry Perkins <br />POPE ASSOCIATES, INC. <br />1360 Energy Park Drive <br />Saint Paul, MN 55108 <br /> <br />Re: #92-211 PARKRIDGE ESTATES <br />Roseville, Minnesota <br /> <br />Dear Mr. Perkins, <br /> <br />Please find enclosed mylar sepia plan sheets C 1: Grading and Utility Plan, and C2: <br />Storm Sewer for the City submittal. The site plan does not allow for a dedicated ponding area <br />for stormwater management. However, we have designed sufficient storage in the proposed <br />greenspace areas, storm sewer piping, storm sewer catchbasins,. and pavement areas in order to <br />reduce the post-development peak discharge rate to 3.23 cfs which is less than the calculated <br />pre-development peak discharge rate of 4.51 cfs. <br /> <br />In order to control storm water discharge from the site, 8" and 6'¡ restriction pipes will <br />be necessary between structure 3 and structure 1. The calculated lOO-yr high water level in <br />the green space at the center of the site is 933.98. The calculated lOO-yr high water level in <br />the swale at the south side of the site is 931.78. Proposed building floor elevations are set at <br />936.00. The emergency overflow elevation is 934.2. <br /> <br />If you have any questions or require additional information, please give me a call. <br /> <br />Sincerely, <br /> <br />SUNDE ENGINEERING, INC. <br /> <br />~oolt~~O <br />