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MERILA & ASSOCIATES, INC. <br />ENGINEERS, SURVEYORS SITE PLANNERS L NNERS <br />7216 Boone Avenue North • Brooklyn Park, MN 55428 <br />Telephone: (612) 533-7595 <br />RECENELi APR 8 1987 <br />April '1 , 19811 <br />Mr. Larry Feldhahn, P.E. <br />Ramsey County Department <br />of Public Works <br />3377 North Rice Street <br />St. Paul, Minnesota 55112 <br />Re: Proposed Drainage <br />Roseville Shopping Center <br />County Road C, West of Snelling Avenue <br />Project No. 86-046 <br />Dear Mr. Feldhahn: <br />Thank you again for your time and information regarding the <br />drainage system in County Road C adjacent to our site. <br />As you are aware, I am the consulting civil engineer for <br />Lincoln Companies for their proposed development on the above <br />referenced site. By this letter, I am requesting consider- <br />ation to allow an additional piping connection outlet from <br />the existing ponding area located at the southeast corner of <br />our site into the county's system on County Road C. <br />I have included a copy of our proposed Grading and Drainage <br />I Plan and our calculation for the site runoff. The proposed <br />pipe is marked in red on the plan. <br />' From our calculations, it can be seen that there was approx- <br />imately 3.99 acres of the Glendenning site which drained <br />directly onto County Road C, accounting for approximately <br />10.2 cubic feet per second for the 100 year rainfall event. <br />i <br />In addition, approximately 5.57 acres of the existing <br />Glendenning site drains to the existing pond at the southeast <br />corner. This pond currently has an outlet via a 15 inch pipe <br />under the frontage road and into the county's system. It has <br />f been calculated that this 15 inch outlet <br />t 1 6 will pass <br />ap roxi <br />p ma e y cfs. (See diagram.) <br />9 <br />