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TKDA ENGINEERS • ARCHITECTS • PLANNERS MEMORANDUM To: Janes Studenski, City Engineer Reference: Justin's Preserve Copies To: From: Scott A. Brink, P.E. Date: December 4, 2003 1500 Piper Jaftray Plaza 444 Cedar Street Saint Paul, MN 55101 -2140 (651) 292 -4400 (651) 292 -0083 fax www.tkda.com City of Lino Lakes, Minnesota Comm. No. 12701 -002 Routing: The City of Lino Lakes has received an application for a Preliminary Plat, labeled as Justin's Preserve. The proposed plat essentially splits an existing 14.15 acre parcel of property into two residential lots of 2.23 acres and 11.79 acres respectively. It is proposed that an existing single family home will remain on the larger parcel, and that a new single family home will be constructed on the smaller lot. The property is located along the south side of Baldwin Lake The following documents have been provided: 1. Existing Conditions and Preliminary Plat by E.G. Rud and Sons, Inc., dated November 7, 2003. 2. Preliminary Grading, Drainage, Erosion Control, and Utility Plan by Plowe Engineering, Inc., dated November 7, 2003. Ordinary High Water Level (OHWL) determination by Piowe Engineering, Inc., dated November 7, 2003. The following review comments are provided: . 1 The proposed subdivision will require the review and approval of the Rice Creek Watershed District (RCWD). Rules indicate that any subdivision of property over 5 acres in size requires a permit from RCWD. 2. A first floor elevation (H4±) of 890.0 is proposed. A low floor lowest opening elevation of 989.6 is provided on the plan, and appears to be in error and must be revised accordingly. The 100 -year high water elevation of Baldwin Lake is identified as 885.30 according to the survey provided. The City's minimum building elevation floor elevation (including basement), must be the greatest of the following: :2 feet above the design flood elevation, 4 feet above the water table, or 1 foot higher,than the emergency overflow elevation. The elevations provided therefore would meet requirements :: based on Baldwin Lake flood elevations. However, the groundwater elevation is not known, and the . lowest floor elevation would need to be 4 feet above the water table as required. In addition, the edge of the existing wetland bordering the future home site is at an elevation of roughly 887 -888 feet according to the survey, and an Ordinary Water Elevation (OHWL) of 887.59 has been determined An Employee Owned Company Promoting Affirmative Action and Equal Opportunity