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• • TKDA ENGINEERS • ARCHITECTS • PLANNERS MEMORANDUM To: Thomas D. Prew, P.E. Reference: Golden Acre Copies To: James E. Studenski, P.E. From: Connie J. Taillon, P.E. Proj. No.: 13602.000 Date: August 3, 2006 Routing: 1500 Piper Jaffray Plaza 444 Cedar Street Saint Paul, MN 55101 -2140 (651) 292 -4400 (651) 292 -0083 Fax www.tkda.com Drainage Review City of Lino Lakes, Minnesota The following review is based on these submittals: 1. Grading, Drainage, and Erosion Control Plan, submitted by Metro Land Surveying & Engineering, dated July 24, 2006. 2. Drainage Calculations, submitted by Metro Land Surveying & Engineering, dated July 27, 2006. Drainage Review Comments: 1. The existing area is 1,100 sf more than the proposed area. Typically, the existing and proposed areas should coincide. Please clarify. To prevent adverse impacts to downstream properties, the post - development runoff rates from the site shall not exceed predevelopment rates for the 2 -, 10 -, and 100 -year storm events. 3. Show the location of the rock construction entrance and inlet protection on the plans. 4. Include a detail of the rock construction entrance and inlet protection on the plans. 5. Include a note indicating that streets shall be kept free from sediment carried by construction traffic. 6. A Storm Water Pollution Prevention Plan (SWPPP) will need to be developed as part of the Application for General Storm Water Permit for Construction Activity (MN R100001) required for this project. A copy of the SWPPP will need to be submitted to the City so that a copy exists at City Hall. 7. Contact Rice Creek Watershed District to determine if a permit is required for this project. If a permit is required, the watershed district will need to give approval prior to the City issuing final approval. An Employee Owned Company Promoting Affirmative Action and Equal Opportunity