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�l �r49 it vi III V➢ ail l� �!„!2 �{ Ir li, ;,I fY YVI „;�) <br />'vH :: 1,r1 iiaui kw,�J " <br />520 Lafayette Road North I St. Paul, Minnesota 55155-4194 I 651-296-6300 <br />800-657-3864 I Use your preferred relay service I info.pca@state.mn.us I Equal Opportunity Employer <br />May 24, 2017 <br />Mr. Tim Gladhill <br />Community Development Director <br />City of Ramsey <br />7550 Sunwood Drive NW <br />Ramsey, MN 55303 <br />Re: Riverstone Addition Environmental Assessment Worksheet <br />Dear Mr. Gladhill: <br />Thank you for the opportunity to review and comment on the Environmental Assessment Worksheet <br />(EAW) for the Riverstone Addition project (Project) located in the city of Ramsey, Anoka County, <br />Minnesota. The Project consists of an 89-acre residential development. Regarding matters for which the <br />Minnesota Pollution Control Agency (MPCA) has regulatory responsibility and other interests, the MPCA <br />staff has the following comments for your consideration. <br />Low Impact Design <br />The MPCA advocates the use of Low Impact Design (LID) practices to aid in the minimization of <br />stormwater impacts. LID is a stormwater management approach and site -design technique that <br />emphasizes water infiltration, values water as a resource, and promotes the use of natural systems to <br />treat water runoff. Examples include: <br />• Special ditches, arranged in a series, that soak up more water <br />• Vegetated filter strips at the edges of paved surfaces <br />• Trees or swales between rows of cars <br />• Residential or commercial rain gardens designed to capture and soak in stormwater <br />• Porous pavers, concrete, and asphalt for sidewalks and parking lots <br />• Narrower streets <br />• Rain barrels and cisterns <br />• Green roofs <br />LID concepts may be found in the State of Minnesota Stormwater Manual dated November 2005 located <br />on the MPCA website at: http://www.peastate.mn,us/waterJstorrwater/stgrmwote„r-rnanual.html_. <br />In addition, the MPCA LID webpage provides a description and examples of LID features such as <br />permeable pavement, rain gardens, and green roofs. Links to other resources on LID are available as <br />well. The website is located at: https,Jjwww.oca.state.rnn.us/water/stormwater-rrlanat;ernent.-low- <br />im„Rgg development:,and„:g cturc . <br />__.. ,.. rEen.-irlfrast.r:U...................._. <br />