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City of Orono <br />Surface Water Management Plan February 2019 42 <br />identified for the Stubbs Bay (SB) subwatershed. Should any improvement sites be <br />identified in the future, this plan should be updated to include proposed sites. <br />Tanager Lake (TL) Subwatershed Improvements <br />TL-1. Hackberry Park <br />Hackberry Park is located on the west side of Willow Drive North, between Elm Lane <br />and Maple Lane. Runoff draining to Hackberry Park currently discharges through an <br />inlet on the north side of park into the storm sewer system and flows west to Tanager <br />Lake without any treatment. Due to the lack of inlet and conveyance capacity, flooding <br />is observed during larger rain events. In order to provide water quality improvement <br />and limit flood potential, a sump manhole with flow baffle, new inlets, and storm sewer <br />improvements should be considered for this location. The retrofit sump manhole <br />would provide stormwater runoff treatment from a previously untreated area of Orono, <br />improving the quality of runoff reaching Lake Minnetonka, and ultimately Minnehaha <br />Creek. In addition, flooding potential would be minimized due to increased conveyance <br />capacity. <br />Prioritization:Low <br />Estimated Cost: Unknown <br />Project Partner(s): MCWD <br />Funding Source(s): City, MCWD, Grant funding <br />Timeframe: Unknown <br />TL-2. Orono Public Golf Course <br />The Orono Public Golf Course is located on the west side of Orono Orchard Road <br />South just south of the intersection with Luce Line Trail. Runoff from the east side of <br />Orono Orchard Road drains under the road and through a wetland and pond on the east <br />side of the Course , outletting through a 24” culvert under Luce Line Trail, and <br />ultimately flowing to Tanager Lake. The west side of the Course drains west through <br />wetlands and ultimately to Tanager Lake. Due to precipitation increases, more frequent <br />flooding is being observed in a few areas of the Course. In order to limit flood <br />potential, volume reduction, storage capacity, and storm conveyance improvements <br />should be considered for this location. Bioretention areas and conveyance <br />improvements would provide volume reduction, additional storage capacity, and <br />improved flow characteristics, thus limiting flood potential. Also, these improvements <br />would provide additional stormwater runoff treatment, improving the quality of runoff <br />reaching Lake Minnetonka, and ultimately Minnehaha Creek <br />Prioritization:Medium <br />Estimated Cost: Unknown <br />Project Partner(s): MCWD <br />Funding Source(s): City, MCWD, Grant funding <br />Timeframe: Unknown <br />West Arm (WA) Subwatershed Improvements <br />Currently, no localized stormwater management improvement projects have been <br />identified for the West Arm (WA) subwatershed. Should any improvement sites be <br />identified in the future, this plan should be updated to include proposed sites. <br />Should any additional localized stormwater treatment improvement projects be <br />identified in the future, this plan should be updated to include proposed projects.