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2018-01-24 CC Packet
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2018-01-24 CC Packet
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( Stantec <br /> CITY OFCENTERVILLE -2D1QLOCAL WATER PLAN <br /> WATER RESOURCE MANAGEMENT PLAN <br /> TABLE Q.1 -TPREMOVAL FACTORS FOR PROPERLY DESIGNED BK8Pe <br /> Infiltration Infiltration Feature 1.00 <br /> Water Reuse Irrigation 1.00 <br /> Biofiltration Underdrain 0.65 <br /> Filtration Sand or Rock Filter 0.50 <br /> Stormwater Wetlands Shallow Wetland 0.40 <br /> Pond/Wetland 0.55 <br /> Stormwater Ponds Wet Pond 0.50 <br /> rMultiple Ponds 0.60 <br /> Infiltration may be infeaoib|e, due to potential contamination /i.e. contaminated soils or potential <br /> otornnvvaterhotopoto\. physical limitations /i.e. low permeability soils, bedrock close tothe <br /> infiltration area, seasonal high water tables, or karst areas), or land use limitations /i.e. nearby <br /> vve||o orutility |ooadono\. |nthese cases, alternative BMPoare required, as listed inTable 0.1 <br /> These BMPo are stated in order of RCVVD'o preferenoe, due toTP removal efficiencies. <br /> The RCWD requires protective easements for all stormwater detention facilities and conveyance <br /> structures. These easements are intended to protect floodplain and otormvvater storage areas <br /> from alterations that may interfere with storage and/or flow of surface vvater, particularly during <br /> flood conditions. They also serve as formal notice to the property owners and future property <br /> owners that the land within the easements may beinundated atany future date. <br /> Maintenance ofotormvvaterfacilities will be coordinated with the RCVVD. CurrenUy, inspections <br /> are performed inthe spring and fall, with maintenance done ao needed. Maintenance ofthe <br /> current system will continue to be a priority for the City. As new development 000uro, developers <br /> will "turn over" these new otornnvvaterfaoi|ideo to the City Public Works Departnnent, including <br /> trunk and lateral storm oevvene, catch basins, otormvvater BMPo, and ponds and outlet <br /> structures. With such a relatively new storm sewer system, there are currently few maintenance <br /> tasks other than street sweeping, which is done a minimum of twice per year. However, the City <br /> plans to formulate a Maintenance Plan Budget within five years. <br /> City staff will inspect ponds in accordance with the requirements of the NPIDES MS4 Permit. <br /> The City not only will inopeot, but also will dredge public pondo, which is defined as any pond <br /> that takes drainage from the City's storm sewer <br /> Potential capital improvement projects are described in Chapter 8, Capital Improvements Plan. <br /> These projects ohou|daidinaddreooingmaintenanoeoonoernovvithintheirreopeotiveareao. <br /> 0.21 <br />
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