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r <br />t- <br />I <br />ARCHmCTURi I ENCINEERINC <br />11840 Valiev View Road. Eden Praire. NVN 553-*-i <br />Mail Addicss Bo.x 1243. Minneapoiis. MN ”44':i <br />Telephone 612 828-4500 FAX 612 82?-l'4j 5."'" . <br />November 7, 1990 <br />Hr. Ron Quanbeck <br />Hinnehaha Creak Watershed District <br />P. 0. Box 387 <br />Wayzata, Minnesota 55391 <br />NOV 8 1990 <br />RE:Rick’s Super Valu <br />Navarre, Minnesota <br />Project «1006.13 <br />Dear Ron: <br />Attached Is an application on behalf of Rick's Super Valu for plan approval. <br />The site is being modified by adding to the existing building with aoditional <br />grocery store space and a loading dock. The access to the dock and a small <br />portion of the parking lot will be revised per the attached plan. <br />A storm water retention basin Is being proposed on a "space available basis; <br />that Is -.he area available would be utilized allowing 3;1 sideslopes on the <br />dike anc fcuilding backslope. The retention volume would be approximately 8,100 <br />cu.ft. <br />When the site was Improved in 1976, there were three underground storage spaces <br />provided for storm water. These are shown on the 1976 plan of the site also <br />attached to this application. They were excavated and filled • ith course rock <br />to act both as drainflelds and temporary storage. We know or no data available <br />as to the effectiveness of these spaces. <br />There Is a history of flooding along Kelly Avenue. There is no clearly visible <br />th#n with McCoiabs-Knutson Associates^ to suggest alternative solutions to the <br />flooding. At appears that none of the suggested improvements have been made. <br />A copy of that report is submitted with this letter. <br />An aerial topographic map, copy enclosed, was found in our files. This is not <br />dated but is obviouslv 'pre' Freshwater Institute. It shows the relationship <br />of the low ground to the store site. <br />The site Itself will contain 123,840 sq.ft, of which 90,920 sq.ft, is hard <br />surface (building, blacktop, concrete). About 7,000 sq.ft, of the bituminous <br />parking drains to the catch basin connected to the county road system. About <br />16,500 sq.ft, of the adjacent property on County Road 19 drains toward the <br />proposed retention. The latter contains about 13,300 sq.ft, of hard cover.