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CCP 11-10-2003
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CCP 11-10-2003
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5/8/2007 1:18:44 PM
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11/14/2006 2:38:11 PM
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<br />I <br />Ie <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />.. <br />I <br />I <br />I <br />I <br />I <br />I <br />.. <br />I <br />I <br /> <br />c. Proposed Drainage/Water Quality Improvements <br /> <br />Drainage Overview The existing surface drainage patterns for the neighborhood are illustrated in <br />the exhibits in the appendix. The majority of the Edgewater neighborhood <br />drains overland, to the existing wetland at Lake Lane and Edgewater <br />A venue. A significant amount of water drains overland to Lake Josephine <br />(south of Edgewater Avenue). Between the two Shoreline Lane cul-de-sacs <br />and including a portion of the south cul-de-sac, runoff drains into a couple <br />of existing small storm ponds. The remaining Shoreline neighborhood <br />flows overland, through the County Road D pond to Lake Josephine. The <br />proposed drainage improvements will maintain existing drainage patterns <br />while incorporating low impact stilling basins to improve water quality as <br />described below: <br /> <br />Edgewater Avenue System Proposed storm sewer improvements associated <br />with the Edgewater Avenue system include the <br />creation of a storm water pond for the Edgewater <br />Avenue and Lake Lane storm sewer outlets. The <br />property at Edgewater and Lake Lane was recently <br />transferred from Ramsey County to the City for <br />drainage purposes. The proposed stilling basin <br />will have an initial forebay which is designed to <br />collect sediment and salts from runoff, preventing <br />them from settling in the larger pond. This makes <br />pond maintenance more efficient, as the majority <br />of the sediment is in the forebay and can easily be <br />cleaned out. The larger pond will be designed to <br />contain a 2.5" rainfall over the entire tributary <br />neighborhood to the pond. The proposed pond <br />system will meet the guidelines for the National <br />Location afproposed pond at Edgewater and Lake Lane Urban Runoff Program (NURP) which should <br />remove between 60% and 80% of pollutants from <br />the runoff prior to discharging into the natural <br />wetland area to the north. <br /> <br /> <br />6 <br />
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