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�� , <br /> � <br /> /�'i��L.7 <br /> � . <br /> i �,,,�<,un�.A:: • � _ ' 701 Xenia Avenue South <br /> Swte 300 <br /> Minneapolis,MN 55416 <br /> Tel: 763-541�800 <br /> Fax. 763-541-1700 <br /> Memorandum <br /> To: Minnehaha Creek Watershed District,Permitting Departrrient <br /> From: Tom Voll, WSB &Associates,Inc. <br /> Date: December 11, 2014 <br /> Re: �YICWD 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 Apri12015 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 0.3 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 Along 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. Rge��/�� <br /> oEc � z 2o�a <br /> Equal Opporturnty Employer � � � O� , CITM O�O�ONO <br /> wsbeng com <br /> K UHf,xU-1 ul\AdmmlPcnmtsUviCWDUNCWD Mcmo 12-I I-Il doc� <br />