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The District boundaries cover all of Contra Costa County. Within District right of ways, they District can dictate hydrology methods and freeboard standards. The County has adopted our standards and so in the unincorporated areas our standards are used. FEMA will require you to use the FCD flow rates in any FEMA study. The District can generate the flow rates using the Hydro program.
Any such obstructions will be removed as necessary for maintenance and access purposes and will not be repaired or replaced (Title 0; 914-14.010).