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City of Orono <br />Surface Water Management Plan February 2019 36 <br />restoration. <br />Prioritization:High <br />Estimated Cost: $160,000/yr <br />Project Partner(s): MCWD, Private Landowners <br />Funding Source(s): City, MCWD, Grant Funding <br />Timeframe: Unknown <br />G-3. Stormwater Runoff Management and Treatment Measures <br />Correct flooding issues on City property as necessary to protect public safety and <br />minimize potential for property damage. Also, as opportunities become available, <br />install stormwater treatment measures (i.e. rain gardens, stormwater treatment devices, <br />etc.) throughout the City to provide additional runoff storage capacity, reduce runoff <br />rates and volumes, and/or reduce pollutant loads. The City will evaluate public <br />properties and collaborate as necessary with MCWD and willing private landowners <br />for viable locations not on City land to install measures. Measures will be coordinated <br />to treat stormwater discharge from areas with inadequate or no treatment and improve <br />the quality of runoff reaching area surface waters. <br />Prioritization:Low <br />Estimated Cost: Unknown <br />Project Partner(s): MCWD, Private Landowners <br />Funding Source(s): Stormwater Utility Fee, MCWD, Grant Funding <br />Timeframe: Unknown <br />Browns Bay (BB) Subwatershed Improvements <br />BB-1. Hanlon Avenue <br />Runoff draining to the low area north of Dickonson Street currently outlets through <br />storm sewer along Hanlon Avenue to a wetland on the north side of Shoreline Drive, <br />then through a submerged 30” pipe under the road to the wetland on the south side, <br />then through 2 – 18” culverts under Ferndale Road, and finally a 12” culvert through <br />the old road bed of Shoreline Drive to Browns Bay. In addition, no treatment is <br />provided prior to any wetland outfalls. Due to lack of conveyance capacity and volume <br />control, flooding is observed during larger rain events along Hanlon Avenue (and in the <br />wetland adjacent to 1185 Ferndale Road). In order to provide water quality <br />improvement and limit flood potential, rain gardens, sump manholes with flow baffles, <br />new inlets, and storm sewer improvements should be considered for this area. The <br />retrofit rain gardens and sump manholes would provide stormwater runoff treatment <br />from a previously untreated area of Orono, improving the quality of runoff reaching <br />Lake Minnetonka, and ultimately Minnehaha Creek. In addition, flooding potential <br />would be minimized due to increased conveyance capacity and decreased runoff <br />volume. <br />Prioritization:Low <br />Estimated Cost: Unknown <br />Project Partner(s): MCWD <br />Funding Source(s): City, MCWD <br />Timeframe: Unknown <br />Carman Bay (CB) Subwatershed Improvements <br />CB-1. Casco Point Park <br />Casco Point Park is located at the south end of Casco Point Road. Runoff draining to <br />Casco Point Park currently discharges through a 6” clay tile line that is located on the