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<br />S E C T ION IV: Alternative Droinage Master Plans <br /> <br />A.) General Discussion <br /> <br />A meeting was held with the vor10US entities on February 14, 1974, <br /> <br />at \;hich time a schematic was presented of the flood pla:in [or a 100- <br /> <br />year frequency storm of 6-hour durotion based on proposed lanel use <br /> <br />conditions. <br /> <br />Several possibilities for improvements were discussed for <br /> <br />various reaches along the Big Dry Creek Channel "hi.ch would reduce <br /> <br />flooding and potential flood damage. <br /> <br />From the numerous possihilities, <br /> <br />three distinctive plans were selected as being wortby of further pLll1- <br /> <br />ning and analysis from which one plan would ulUmately be implemented <br /> <br />as "the best" major drainageway master plan. <br /> <br />The three plans are as follows: <br /> <br />Plan No.1 - Flood Plain Delin8at~on <br /> <br />Plan No.2 - Structure and Channe.I_J!;lEl'!2\,.e~(;!2.1:~ <br /> <br />Plan No.:> Flood Control llam and Structure and C)Jannel <br />------~I mEra;;' c!!l.:cn5~_---~.------_-.__n___-_._--~._----- <br /> <br />Table IV-l is a tabulation of information of the drainage structures <br /> <br />along Hig Dry Creek. <br /> <br />The capacity of each drainage structure has been <br /> <br />calculated based on a water surface elevation of 1.0 foot below the <br /> <br />crown of the roadway. <br /> <br />A detailed review by channel reach of each of the above plans <br /> <br />follows, including: <br /> <br />Potential flood damage and estimated damage costs for 10-, 25-, <br />and laO-year frequency storms <br /> <br />Proposecl improvements and estimated improvements costs <br /> <br />- ,1:). <br />