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• . t ATTACHMENT A <br /> , <br /> Deliverables <br /> • Updated Concepts,Layouts , and Costs for Early Action Projects <br /> • Draft Early Action Project Report Chapter <br /> 9.0 Watershed Planning Needs,Priorities, and Procedures <br /> Overview <br /> The Decatur area is drained by seven(7)major watersheds that outlet into the Sangamon River. <br /> In the 1966 report,these seven watersheds were subdivided into approximately 37 sub- <br /> watersheds. The seven major watershed areas comprise somewhat independent study units that <br /> need to be evaluated individually, due to the physical interrelationships of drainage features <br /> within a watershed. Some watersheds may have more problems than others and will have a <br /> higher priority than others. <br /> A stormwater master planning procedures manual will be developed to assist in implementing <br /> the watershed based plans. Phase I does not include preparation of the actual watershed plans, <br /> but rather lays out the design criteria, analysis methods, and other procedures that will be needed <br /> to complete individual watershed plans.Budget level cost estimates and a preliminary schedule <br /> for completing individual watershed plans will also be prepared. Phase II of the project will <br /> include the preparation of these watershed plans. Some of the elements to be addressed in this <br /> procedures manual include: <br /> • Data Collection <br /> • Hydrologic Analysis <br /> • Hydraulic Analysis <br /> • Floodplain/Floodway Mapping <br /> • Problem Identification <br /> • Future Development in Watershed <br /> � Water Quality Enhancements <br /> • Protection of Wetland,Riparian, and Recharge Areas <br /> • Alternatives Analysis <br /> • Economic Analysis <br /> • Jurisdictional Responsibilities <br /> • Facility Maintenance <br /> Work Tasks <br /> 9.1 For each of the seven watersheds,review/evaluate information on existing/future <br /> problems and coordination needs with other programs. <br /> 9.2 Identify jurisdictional issues for each watershed that identify regulatory authority and <br /> maintenance responsibility for stormwater facilities within each watershed. <br /> 9.3 Develop preliminary objectives for each watershed. <br /> 9.4 Review existing hydrologic and hydraulic models and analysis methods specific to each <br /> watershed. <br /> A-10 <br />