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Improvement projects will be coordinated with and TMDL reduction managed through <br />the City's SWPPP. The following are outlet control structure improvement projects <br />identified to help manage stormwater runoff and improve water quality. <br />0-1. Casco Point Park Outlet <br />Casco Point Park is located in the Carman Bay (CB) Subwatershed. Runoff draining to <br />Casco Point Park currently discharges through a 6" clay tile line that is located on the <br />south side of the park and drains south to Lake Minnetonka. The tile is undersized for <br />the drainage area and in poor condition. The stormwater drainage model predicts that <br />even during smaller rain events, flooding occurs in the park with runoff overtopping the <br />road, which agrees with local observation. In order to limit flooding potential and <br />adequately convey runoff, an outlet control structure should be installed in the park and <br />a new 12" pipe should be installed to Lake Minnetonka. In addition, water quality, <br />volume reduction, and/or storage capacity improvements should be considered in this <br />location to provide runoff rate and pollutant reduction, promote groundwater recharge, <br />and meet TMDL goals. As such, this project should be coordinated with Section 5.4. <br />Prioritization: High <br />Estimated Cost: $58,066.25 <br />Project Partner(s): MCWD <br />Funding Source(s): City, MCWD <br />Timeframe: Unknown <br />0-2. Casco Cove Outlet <br />Runoff draining down Casco Point Road in the neighborhood of 2900 Casco Point <br />Road drains east to a low area in the backyards between Casco Point Road, Casco <br />Avenue, and Casco Cove. Runoff then discharges through a 12" RCP across Casco <br />Cove to Lake Minnetonka without any treatment. The area around the backyard <br />depression is located in tree canopy and somewhat denuded of vegetation. The outlet is <br />undersized for the drainage area and in poor condition. The stormwater drainage model <br />predicts that even during smaller rain events, flooding occurs in the backyards with <br />runoff overtopping the road, which agrees with local observation. In order to limit <br />flooding potential and adequately convey runoff, an outlet control structure should be <br />installed in the backyards, and a new 12" pipe should be installed to Lake Minnetonka. <br />In addition, water quality, volume reduction, and/or storage capacity improvements <br />should be considered in this location to provide runoff rate and pollutant reduction, <br />promote groundwater recharge, and meet TMDL goals. As such, this project should be <br />coordinated with Section 5.4. <br />Prioritization: High <br />Estimated Cost: $79,145.00 <br />Project Partner(s): MCWD <br />Funding Source(s): City, MCWD, Private Landowners <br />Timeframe: Unknown <br />0-3. McCulley Road Outlet <br />Runoff from the east side of McCulley Road, from approximately Bayside Road to <br />Watertown Road, currently drains to a submerged 24" pipe crossing just north of the <br />Luce Line Trail crossing. Due to the submerged design and beaver activity, <br />maintenance is difficult and flooding of the adjacent trail frequently occurs. In order to <br />limit flooding potential and adequately convey runoff, an outlet control structure should <br />be installed on the east side of McCulley Road. In addition, storm sewer <br />improvements should be considered in this location to help limit flooding potential and <br />City of Orono <br />Surface Water Management Plan February 2019 34 <br />