Agenda Packets - 2021/07/06 - Laserfiche WebLink

Home Browse Search

. 0 4 GERALD M. SUNDE, Consulting Engineer 10524 ZION AVENUE SOUTH • MINNEAPOLIS. MN 55437 • PHONE (612) 881.3344 Mr. Pete Willenbring Rice Creek Watershed District c/o E. A. Hickok and Associates, Inc. 545 Indian Mound Wayzata, Minnesota 55391 Mr. Kent Lokkesmoe Department of Natural Resources Region 6 1200 Warner Road St. Paul, Minnesota 55106 Gentlemen: March 31, 1982 V'A7 Re: DNR Permit 80-695,8, Oak Lake Park Ponding Area Moundsview, Minnesota PF APk5 1982 a REGION V! WATERS Based on discussions with our clients, Marvin H. Anderson Construction Company and Kraus Anderson Development Corporation, we have prepared revised grading and drainage plans and performed new calculations for the above ponding area. Changes are as follows: 1. The new plans will eliminate any excavation work in the pond area to the south of the'existing ditch and along the west property line of the Scottland Green apartment complex. This is done in order to prevent soil movement on the apartment lands and also to preserve vegation in that area. 2. The tributary drainage area considered to flow to the pond at final development is reduced from 266 acres to 203 acres. Areas eliminated from the tributary drainage area include the O'Neill property to the east, the City hall area, and the shopping center north of Highway 10. Residential and commercial lands to the north of County Road I and resi- dential lands west of Silver Lake Road are assumed to drain to the Oak Lake Park ponding area. The tributary drainage area boundary is shown on a drawing included with our calculations. 3. The outlet structure is slightly modified in order to reduce discharge from the ponding area for the 100 year runoff event from 15.0 cfs to 12.5 cfs. This is done by narrowing the weir overflow by about 1.0 foot. Work is presently completed on all areas to be excavated to elevation 889 or deeper as shown on the original submittal drawings. During the .Wj