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Stantec CITY OF CENTERVILLE -2018 LOCAL WATER PLAN WATER RESOURCE MANAGEMENT PLAN 6.0 WATER RESOURCE MANAGEMENT PLAN This chapter of the plan provides specific information as to the proposed management framework and methods to meet the water resource management objectives and policies outlined in Chapter 5. The storm sewer and drainage basin map for the City is presented in Figure 8. 6.1 STORMWATER MANAGEMENT AND MAINTENANCE The City experienced significant development in the early to mid-2000s. While development has slowed considerably the past several years due to the economic downturn, it is likely to pick up again in the future. It is anticipated that development could continue in the City for a number of years into the future until near ultimate population and growth is achieved. Stormwater improvements are a requirement of City Code Chapter 157 for new developments. Most new storm sewer constructed in the City will be funded by developers, either directly or through a bonding and assessment process. In accordance with the RCWD Watershed Management Plan, and in an effort to protect downstream waters, the City requires that all new developments provide for treatment of stormwater discharge. If a project cumulatively creates or reconstructs 10,000 square feet or more of impervious surface, the developer must apply for a permit from the City and RCWD for the project. The current water quality treatment standard for all projects except public linear projects is determined as follows: Required Water Quality Treatment Volume (f t3) = Area of New or Reconstructed Impervious Surface (f tZ)x 1.1(in) in \ TP Removal Factor from Table 1 -- t/12 (f I Required Water Quality Treatment Volume (f t3) in = Area of New or Reconstructed Impervious Surface (f tZ)x 0.75(in) - 12(-) 6.20 58