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FEB -05 -2083 12:44 TKDA • ENGINEERS • ARCFIJTEGIS • PLANNF.RS • • MEMORANDUM CITY OF LINO LAKES 651 982 2499 P.03/11 150o Piper affray Plaza 444 Cedar street Saint Paul, MN 55101 -2140 051) 292 -4400 (851) 292 -0083 Fax www.tkda.com To: James E. Studenski, P.E. Reference: Engineering Review of Century Copies To: Farms North (1st - 6th Additions) Residential Development Comm. No. 12701 -002 From: Patrick M. Windier, P.E. Routing: Date: February 5, 2003 The enclosed engineering review was based on the following documents: 1. Plan Sheets for Century Farms North (1st - 6th Additions): • Preliminary Grading (G1, 02, G1A - D) • Preliminary Utility Plan (U1, U1A - D) • Existing Conditions Plan (Storm Drainage Areas) Plan Sheet W1 ▪ Developed Conditions Plan (Storm Drainage Areas) Plan Sheet W2 The above plans were provided by Metro Land Surveying and Engineering (Developers Engineering Firrn) and dated November 20, 2002. 2. Copy of Rice Creek Watershed District Permit Application dated December 6, 2002. 3. HydroCAD stormwater modeling calculations and dated January 3, 2003: • Pre - Development Conditions (2 -year, 10 -year and 100 -year) - Post - Development Conditions (2 -year, 10 -year, 100 -year and 2.5" rainfall) • Outflow peak Flow Comparison Chart (not dated) and other summary Tables 4. Previous Engineering Review and dated November 7, 2003. ENGINEERING RE i ✓I 7 %) % COMMENTS: 1. Sanitary Sewer System - Plan Sheets U1 and U1A through U1D: A. The existing sanitary manhole invert elevation located at the intersection of Pinto Lane and Mustang Lane should be 892.25 according to our records, and not 882,25 as shown on Plan Sheet U1A. This is a ten (I 0) foot differential. Because of this differential, sanitary service to the proposed homes on Century Trail from Sunset Road to the proposed Sanitary Lift Station An Employee Owe Company Promoting Affirmative Anion and Equal Opportunity