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- <br /> ��� <br /> �,,,,,,�.� engineering•planning•environmental•construcfion 701 Xenia Avenue South <br /> Suite 300 <br /> Minneapolis,MN 55416 <br /> Tel: 763-541-4800 <br /> Fax: 763-541-1700 <br /> Memorandum <br /> To: Minnehaha Creek Watershed District,Permitting Department <br /> From: Tom Voll, WSB &Associates, Inc. <br /> Date: December 11, 2014 <br /> Re: MCWD Application—Hennepin County Orono Maintenance Facility Expansion <br /> WSB Project No. 01680-130 <br /> This memo provides a summary of the requirements for utility improvements and the <br /> construction of an expansion of the existing Hennepin County Maintenance FaciliTy at 3880 <br /> Shoreline Drive in the City of Orono, MN. Based on review of MCWD rules,this project is <br /> subject to the erosion control and stormwater management requirements. The construction is <br /> expected to begin in April 2015 and be completed in November 2015. <br /> Description: <br /> Utility improvements will consist of a new water service installation from Shoreline Drive to the <br /> building,under the existing driveway. An expansion to the facility will be constructed on the <br /> north end of the existing building. The project will disturb an area of 03 acres and will not <br /> increase the amount of impervious surface on the site. <br /> Erosion Control: <br /> The plan shows the implementation of the following erosion and sediment control practices. <br /> Table 1. Pro osed Erosion and Sediment Control BMPs <br /> BMP T e Location <br /> Silt Fence Alon Shoreline Drive &Down Gradient of Ex osed Soils <br /> Inlet Protection Storm Drains (Includin Down Gradient and Off-Site) <br /> Sod Ex osed Soils <br /> Additionally,the existing driveway will act as the construction entrance. All exposed soils will <br /> be surrounded by existing asphalt or similar impervious surface. <br /> Stormwater Management: <br /> The site size is larger than 5 acres, with less than 40% site disturbance and no change in <br /> impervious surface. This triggers the stormwater management rule and requires that BMPs are <br /> incorporated into the project. <br /> _��. , � <br /> Equal Opportunity Employer <br /> wsbeng.com <br /> K:�AI680-130�AdminWmmi�Vv1CWDVytCWDMano I3-I I-14.docx <br />