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PC <br /> #LA18-000022 <br /> Exhibit L <br /> MINNEHAHA CREEK WATERSHED DISTRICT <br /> QUALITY OF WATER QUALITY OF LIFE <br /> March 7, 2018 <br /> Melanie Curtis <br /> 2750 Kelley Parkway <br /> Orono, MN 55356 <br /> RE: 825 Old Crystal Bay Road, Orono <br /> Dear Ms. Curtis, <br /> Thank you for providing me with an opportunity to comment on the proposed subdivision at 825 Old <br /> Crystal Bay Road in the City of Orono. <br /> First,the preliminary plat plan provided to me depicts the wetland boundaries included in the <br /> application for Boundary and Type Concurrence under the Wetland Conservation Act.Those boundaries were <br /> adjusted in the field, and the approved wetland boundary for Wetland 1 is larger than originally delineated.The <br /> approved boundary is attached. I recommend that the applicant update the preliminary plat drawings with the <br /> approved wetland boundary. <br /> Second, I would like to formally address the MCWD permitting requirements for the project. Single <br /> family homes are exempt from the stormwater management rule, but subdivision of a parcel of one acre or <br /> more into three or more lots, requires stormwater treatment. The MCWD adopted definitions define parcel as <br /> contiguous land under common ownership, so the parcel for the purposes of determining stormwter treatment <br /> includes the two lots owned by Judson Dayton to the southeast of the property proposed for subdivision under <br /> this application.While this plat only involves a two lot subdivision, it is my understanding that a future project <br /> will involve lot line adjustment and construction of new homes on the two lots to the southeast. Considering the <br /> project in aggregate, under the common scheme of development framework,the overall subdivision is required <br /> to provide stormwater treatment.The scope of treatment is dependent on the amount of site disturbance and <br /> increase in impervious surface, and phosphorus, rate,and volume control must be provided for either the new <br /> or existing impervious surface. Whenever the stormwater management rule is triggered,the buffer provision of <br /> the wetland protection rule is triggered,and buffers must be provided downgradient of disturbance. Due to the <br /> complicated nature of the project, I recommend that the applicants schedule a pre-application meeting with <br /> District permitting staff. <br /> If you have any questions, please contact me at eshowalter@minnehahacreek.org or 952-641-4518. <br /> Sincerely, <br /> Elizabeth Showalter <br /> Permitting Technician <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 />