Laserfiche WebLink
� C �w� . <br /> 7699 Anagram Drive <br /> Eden Prairie,MN 55344 <br /> ����`/�i��� 'a'n (952)937-5150 <br /> YY Fax (952)937-5822 <br /> �.aescv✓oodps com <br /> (888)937-5150 <br /> MEMORANDUM <br /> Date: August 25, 2016 <br /> Re: 690 Brown Road—Stormwater Management Concept Plan <br /> Westwood Project#R0009154.00 <br /> To: City of Orono Staff <br /> From: Tom Miller, PE Rose Lorsung <br /> Water Resources Manager Pulse Land Group <br /> This memo summarizes the methods to manage stormwater on the site of the proposed <br /> residential development at 690 Brown Road in Orono, Minnesota adjacent to Long <br /> Lake. The site is undergoing conceptual design and stormwater management has been <br /> identified as an important aspect of the proposed development due to its proximity to <br /> Long Lake (impaired for nutrients, phosphorus as the target nutrient). As such, this site <br /> is proposed to be developed with a Conservation Stormwater Design(CSD), exceeding <br /> the requirements of the Minnehaha Creek Watershed District (MCWD). <br /> Ea�isting Conditions <br /> The site consists of approximately 27 acres that drain to onsite wetlands, Dickey's Lake <br /> Creek and Long Lake. The current landcover contams fields, woods, wetlands as well <br /> as a single family residence on rolling terrain. <br /> Proposed Conditions <br /> The proposed development will entail subdivision to a Low Density Residential (0.2-0.5 <br /> units per acre) and creates 25 buildable lots, 7 larger lots (2+ ac) and 18 medium lots <br /> (�0.5 ac). This stormwater management plan would incorporate additional best <br /> management practices (BMPs) to exceed MCWD standards, reducing overall <br /> phosphorus loading from the development to Long Lake by 25%. <br /> The development will utilize a combination of water reuse,pervious pavers, <br /> raingardens, ponding and sand-iron filtration to achieve an enhanced level of <br /> phosphorus removal and protect the lake. This management plan includes abstraction of <br /> the first 0.5" of runoff and targeted phosphorus removal practices to reduce phosphorus <br /> discharge below required limits. (Attachment 1) <br /> Multi-Disciplined Surveying&Engineering <br /> TBPLS Flrtn No.10074302 'NE.SYWGO(�QS.CORI <br />