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TKDA •NGINEERS. ARCHITECTS • PLANNERS MEMORANDUM To: James Studenski, City Engineer Reference: Vaughan Addition 1500 Piper Jaffray Plaza 444 Cedar Street Saint Paul, MN 55101 -2140 (651) 292 -4400 (651) 292 -0083 Fax www.tkda.com Copies To: City of Lino Lakes, Minnesota From: Scott A. Brink, P.E. Date: November 4, 2004 Comm. No. 12976 -002 Routing: Plans have been submitted that provide for a single family residential development titled Vaughan Addition. The proposed development essentially provides for the construction of 5 single family homes on 3 acres of property. The property is located along the south side of Birch Street between Tomahawk Trail and West Shadow Drive, or directly across Birch Street from Rice Lake Elementary School. Access to the 5 units would be provided by the construction of a short cul -de -sac that would extend from Birch Street. The following documents have been received for review: • Full size and half size plan sheets prepared by Loucks Associates received by the City of Lino Lakes October 7, 2004 as follows: Boundary and Topographic Survey, Preliminary Plat, Cover Sheet (CO -1), Existing Conditions (C1 -1), Site Plan (C2 -1), Grading, Drainage, and Erosion Control (C3 -1), Stormwater Pollution Prevention Plan (C3 -2), Overall Utility Plan (C4 -0), Grading, Drainage, and Erosion Details (C8 -1), and Utility Details (C9 -1) 2. Hydrologic Calculations, submitted by Loucks Associates and received by the City of Lino Lakes October 7, 2004. 3. Revised copies of Sheets C1 -1, C2 -1, C3 -1, C3 -2, C4 -0 and the Preliminary Plat were also received by the City of Lino Lakes on October 26, 2004. The following comments are provided: Grading, Drainage, and Drainage Calculations 1. The drainage calculations are acceptable based on the information provided. However, the calculations are based on the assumption that all hard surface areas (including houses, driveways, and streets), will all be directed to Pond 7P. This is possible only if all roof drains are discharged directly to the driveways at the front of every house. If this is not possible, any drainage to the rear can be directed toward the pond and/or the rain gardens which is acceptable. The only exception would be Lot 5 which does not directly border a detention area. The amount of runoff to the rear of this property should be minimal and • negligible. However, the developer shall be made aware that any grading and changes to the property as it now exists will be noticed by adjoining properties. In particular, the property owner directly to the west may be very sensitive with regards to grading and drainage adjacent to his property, and may request An Employee Owned Company Promoting Affirmative Action and Equal Opportunity