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south side of the park and drains south to Lake Minnetonka without any treatment. The tile is undersized for the drainage area and in poor condition. The stormwater drainage model predicts that even during smaller rain events, flooding occurs in the park with runoff overtopping the road, which agrees with local observation. In order to provide water quality, volume reduction, and storage capacity improvement, a bioretention basin should be considered for this location. The retrofit basin would treat stormwater runoff from a previously untreated area of Orono, improving the quality of runoff reaching Lake Minnetonka, and ultimately Minnehaha Creek. In addition, flooding potential would be minimized due to increased storage capacity and volume reduction. Outlet control structure improvements should be considered in this location, as well, to provide adequate runoff rate control and limit flooding potential. As such, this project should be coordinated with Section 5.3. Prioritization: High Estimated Cost: $54,945.00 Project Partner(s): MC" Funding Source(s): City, MC", Grant funding Timeframe: Unknown CB -2. South Casco Point Road Runoff draining down the street in the neighborhood of 3040 Casco Point Road currently drains through a number of inlets to a 12" CMP to Lake Minnetonka without any treatment. Due to the lack of inlet and conveyance capacity, flooding is observed during larger rain events. In order to provide water quality improvement and limit flood potential, a sump manhole with flow baffle, new inlets, and storm sewer improvements should be considered for this location. The retrofit sump manhole would provide stormwater runoff treatment from a previously untreated area of Orono, improving the quality of runoff reaching Lake Minnetonka, and ultimately Minnehaha Creek. In addition, flooding potential would be minimized due to increased conveyance capacity. Prioritization: High Estimated Cost: $35,653.75 Project Partner(s): MCWD Funding Source(s): City, MCWD, Grant funding Timeframe: Unknown CB -3. Casco Cove Runoff draining down Casco Point Road in the neighborhood of 2900 Casco Point Road drains east to a low area in the backyards between Casco Point Road, Casco Avenue, and Casco Cove. Runoff then discharges through a 12" RCP across Casco Cove to Lake Minnetonka without any treatment. The area around the backyard depression is located in tree canopy and somewhat denuded of vegetation. The outlet is undersized for the drainage area and in poor condition. The stormwater drainage model predicts that even during smaller rain events, flooding occurs in the backyards with runoff overtopping the road, which agrees with local observation. In order to provide water quality, volume reduction, and storage capacity improvement, a bioretention basin and storm sewer improvements should be considered for this location. The retrofit basin would treat stormwater runoff from a previously untreated area of Orono, improving the quality of runoff reaching Lake Minnetonka, and ultimately Minnehaha Creek. In addition, flooding potential would be minimized due to improved conveyance infrastructure, increased storage capacity, and volume reduction. Outlet control structure improvements should be considered in this location, as well, to provide adequate runoff rate control and limit flooding potential. As such, this project should City of Orono Surface Water Management Plan February 2019 37