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• TKDA ENGINEERS • ARCHITECTS • PLANNERS MEMORANDUM To: 1500 Piper Jaffray Plaza 444 Cedar Street Saint Paul, MN 55101 -2140 (651) 292 -4400 (651) 292 -0083 Fax www.tkda.com James Studenski, City Engineer Reference: Highland Meadows East 2nd Addition Copies To: City of Lino Lakes, Minnesota From: Scott A. Brink, P.E. Date: February 26, 2004 Comm. No. 12976 -002 Routing: The City of Lino Lakes has received documents providing for Highland Meadows East 2nd Addition as follows: 1. Preliminary Plan exhibits (11" x 17" and full size), prepared by James R. Hill, Inc. for TSM Development, dated January 12, 2004. 2. RCWD Permit application copy, dated January 12, 2004. 3. Drainage Calculations dated January 8, 2004 4. Full -size Existing and Proposed Drainage Area maps dated January 12, 2004. The proposed Plans provide for the construction of Highland Meadows East 2nd Addition, located south of the intersection of 79th Avenue at Nancy Drive. The project essentially will include the extension of a private drive (cul -de -sac) extending south and westerly from the intersection into the property and serving an area of 3.47 acres with 20 proposed residential dwelling units. This property was originally included within the bounds of a larger Highland Meadows East grading and drainage plan (encompassing 4.9 acres), reviewed and approved in 1999. This 2nd Addition portion was previously described as Outlot A (future multi - family) under the original approval. General Drainage and Drainage Calculation Comments 1. At the time of the initial approval, 4 new single family residential properties were constructed along the south side of 79th Avenue. A drainage pond was also constructed within the Outlot A area to serve the entire 4.9 acres of property, including Outlot A. This pond was originally designed to discharge to the adjacent property to the west (Highland Meadows). The original Highland Meadows site was designed to accept this drainage, and both plans (Highland Meadows and Highland Meadows East) were approved by the Rice Creek Watershed District. However, as a result of modifications to the original grading plan, a permit application to RCWD has been re- submitted. For example, the configuration and discharge of the pond have both changed. Rather than discharging into the wetland immediately to the west, the pond is now shown discharging to an existing 21 -inch RCP located at the southwest corner of the property. Discharge to the 21 -inch pipe is feasible. However, discharge to the wetland as previously approved may be preferred. Further comments and conditions of the RCWD shall be considered and adhered to as required. An Employee Owned Company Promoting Affirmative Action and Equal Opportunity