12/12/2007 P&Z Packet - Laserfiche WebLink

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TKDA ENGINEERS • ARCHITECTS • PLANNERS MEMORANDUM 1500 Piper Jaffray Plaza 444 Cedar Street Saint Paul, MN 55101 -2140 (651) 292 -4400 (651) 292 -0083 fax www.tkda.com To: Matthew Woodruff, P.E. Reference: Vaughan's 1st Addition Copies To: James E. Studenski, P.E. Preliminary Drainage Review City of Lino Lakes, Minnesota From: Connie J. Taillon, P.E. Proj. No.: 13810.000 Date: December 3, 2007 Routing: The following drainage review is based on these submittals: 1. Vaughan's 1st Addition Preliminary Grading, Drainage, and Erosion Control Plan, submitted by Metro Land Surveying & Engineering, dated October 30, 2007. 2. Vaughan's 1st Addition Soil Boring Investigation, submitted by Wenck, dated October 30, 2007. New comments are in bold and identify additional items that need to be addressed. The following are significant issues that must be addressed prior to preliminary plat approval: 1. Submit stormwater calculations for review. Verify that the existing storm sewer system has the capacity to convey additional runoff from the proposed site. In addition, verify if downstream detention ponds receiving additional runoff from the site are sized appropriately. 2. Verify how the depth on the seasonal high water table was determined on Sheet 2. A geotechnical evaluation should be performed to verify the seasonal high water table. The lowest floor elevation is required to be 4 feet above the seasonal high ground water elevation. 12/03/07 This item has been addressed. 3. Wards Lake is classified as a natural environment lake in the City of Lino Lakes Shoreland Management Overlay Ordinance. The City requires a 150 foot structure setback and a 75 foot shore impact zone for a natural environmental lake, both measured from the OHW. Show the 150 foot structure setback and 75 foot shore impact zone on the plan. In addition, label the percent impervious cover on the plans. Additional Items (12/03/07): 4. Section 1102.07 of the City Shoreland Management Ordinance states that, "at least 70% of the shore impact zone of a new development shall be preserved in its natural or existing state." Provide calculations showing that at least 70% of the shore impact zone on Lot 1 is not being disturbed by grading activities. An Employee Owned Company Promoting Affirmative Action and Equal Opportunity