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City of Orono <br />Surface Water Management Plan February 2019 35 <br />maintenance due to beaver activities. As such, this project should be coordinated with <br />Section 5.4. <br />Prioritization: Medium <br />Estimated Cost: Unknown <br />Project Partner(s): MCWD <br />Funding Source(s): City, MCWD <br />Timeframe: Unknown <br />Should any additional outlet control structure improvement projects be identified in the <br />future, this plan should be updated to include proposed projects. <br />5.4 Localized Stormwater Management Improvements <br />5.4.1 Existing Stormwater Management System <br />The areas of Orono consisting of newer developments typically contain storm sewer in <br />good condition, stormwater treatment ponds, and filtration/bioretention basins. The <br />older areas of town typically do not contain any treatment ponds or filtration/ <br />bioretention basins. However, the storm sewer in the areas without treatment measures <br />does effectively convey runoff. Because of this, these areas are not a priority for the <br />City to reconstruct. As funding becomes available and potential stormwater <br />management improvements align with other necessary street and utility improvements, <br />the City will consider installing retrofit stormwater treatment measures as feasible. <br />5.4.2 Proposed Localized Stormwater Management Improvement Projects <br />The City will continue to maintain the existing storm drainage system and evaluate <br />flooding issues on City property as necessary to protect public safety and minimize <br />potential for property damage. Additionally, the City will be available to work with <br />MCWD and private landowners to investigate potential localized stormwater <br />management improvement sites. Improvement projects will be coordinated with and <br />TMDL reduction managed through the City’s SWPPP. The following are localized <br />stormwater treatment improvement projects identified to help manage stormwater <br />runoff and improve water quality. <br />G-1. General Storm System Maintenance <br />The existing storm drainage system is performing adequately to convey runoff, <br />although, system maintenance will be required annually. Storm drainage system <br />maintenance required includes pond assessment and cleaning, street sweeping, sewer <br />televising, and GIS/mapping. <br />Prioritization:High <br />Estimated Cost: Unknown <br />Project Partner(s): MCWD, Private Landowners <br />Funding Source(s): City, MCWD <br />Timeframe: Unknown <br />G-2. Annual Street and Utility Improvement Projects <br />As street, sanitary sewer, and water main improvement projects are scheduled annually, <br />project areas will also be reviewed for potential stormwater management and treatment <br />improvements that were not previously identified. Potential improvements include, but <br />are not limited to, conveyance improvements, stormwater treatment devices, <br />bioretention basins, wet retention ponds, slope stabilizations, and native vegetation