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r To: Steven D. Gatlin, Public Works Director d From: Karl P. Keel, Assistant Public Works Director 4k Re: Site drainage of Roseville Chevrolet Date: April 19, 1989 At its April 10, 1989, meeting, the city council considered the vacation of right-of-way of County Road C-2 from Long Lake Road to 35W. It is proposed that the vacated land be developed fo- additional parking for Roseville Chevrolet. At its April 5, 1989, meeting, the Roseville Planning Commission considered this same vacation. They recommended approval of the vacation with the condition that the vacated land be paved and that curb and gutter be installed around the perimeter of not only the vacated site but the existing Roseville Chevrolet site. In order to assess the necessity of the curb and gutter, the council has requested that engineering staff review the site drainage on both the C-2 right-of-way and the existing Roseville Chevrolet site. Attached is a copy o{: the city's aerial, topography map and a site plan of Roseville Chevrolet showing the general drainage patterns. No-e that this site is very flat but generally drains easterly into a ditch system along 35W and then southerly to a pond at the interchange of County Road C and 35W. In order to install concrete curb and gutter around the existing Roseville Chevrolet parking lot, our available information, short of a detailed topographic survey, would suggest that some regrading of the existing parking lot would be necessary to insure proper drainage and continuity with the new concrete curb and gutter. With respect to the proposed vacated land, the new paved surface can easily be graded to accommodate concrete curb and gutter and provide good site drainage. In addition to drainage concerns on the vacated land, it is necessary that the developer of the site extend a storm sewer line which currently outlets .immediately east of Long Lake Road through the new parking lot to the ditch along 35W. An easement for this line must also be granted to the city. In addition, a city watermain extends through the proposed vacated land. An easement for this facility should also be dedicated. Attached is an enlarged copy of section map with both the watermain and storm sewer drawn on. A 20 foot easement for each facility is highlighted in pink.