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MINNEHAHA CREEK WATERSHED DISTRICT <br /> QUALITY OF WATER QUALITY OF LIFE <br /> January 31, 2018 <br /> Wooddale Builders <br /> ATTN: Matt Juvrud <br /> 6117 Blue Circle Drive, <br /> Hopkins, MN, 55343 <br /> RE: MCWD Permit Application#18-057: 1180 Hunter Drive,Orono <br /> Dear Mr.Juvrud, <br /> Thank you for submitting an application for a Minnehaha Creek Watershed District permit for Erosion Control <br /> located at 1180 Hunter Drive in the City of Orono. The application was received on January 16th, 2018. <br /> After review of the application materials submitted,the proposed project triggers the District's Erosion Control <br /> and Stormwater Mangement rule. Based on additional information needed,the application is incomplete. <br /> Additional information is required to complete the application and is outlined below. <br /> Please submit the following information: <br /> Application information: <br /> Electronic copy of site plans, or physical plans in 11x17 format. <br /> Stormwater Management: <br /> The District's Stormwater Management rule is triggered by the subdivision of a parcel of one acre or more in size <br /> into three or more lots.Although single family homes are exempt from the stormwater management rule,this <br /> lot is a part of the Mooney Lake subdivision permitted under MCWD Permit 15-445.The raingardens on the <br /> approved subdivision plan differ from the raingardens on the proposed plans for 1180 Hunter Drive,and <br /> therefore,conformance with the Stormwater Management rule must be demonstrated.The original subdivision <br /> was required to provide phosphorus, rate, and volume control for the entire site's impervious surface.This lot <br /> will therefore be required to provide that treatment for the impervious surface on the lot. Engineering review <br /> will be required for the stormwater facilities, and the applicant will be required to reimburse the District for <br /> engineering costs.To demonstrate conformance with the Stormwater Management rule, please provide: <br /> 1. Existing and proposed drainage maps; <br /> 2. HydroCAD,or similar modeling, demonstrate 1" of infiltration and no increase in run-off rates for the 1, <br /> 10,and 100 year events; <br /> 3. Details for the proposed raingardens, including: <br /> a. Cross-sectional design; <br /> b. Outlet structure; <br /> 4. Geotechnical reports to a minimum depth of 5 feet below to bottom of the proposed infiltration or <br /> filtration practice demonstrating: <br /> We collaborate with public and private partners to protect and improve land and water for current and future generations. <br /> 15320 Minnetonka Boulevard,Minnetonka,MN 55345 • (952)471-0590 • Fax:(952)471-0682 • www.minnehahacreek.org <br />