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<br />. <br /> <br />PRASE II GENERAL DESIGN MEMORANDUM <br />ARKANSAS RIVER AND TRIBUTARIES ABOVE JOHN MARTIN DAM <br />FOUNTAIN CREEK, PUEBLO, COLORADO <br /> <br />PERTINENT DATA. <br /> <br />Project Purpose <br /> <br />. <br /> <br />Velocity <br />Slope Protection <br /> <br />Flood Protection and <br />Recreational Facilities <br />8,800 feet of East <br />bank levee <br />900 feet of West <br />bank levee <br />11,500 feet of <br />channel improvement <br />200-year recurrence <br />85,000 cfs <br />Undisturbed low flow <br />Limited to 3 feet above <br />thalweg <br />0.004 <br />Varies from 13 to 20 feet <br />Maximum 20 feet <br />Varies from 8 to 20 fps <br />12" to 42" riprap and <br />soil cement on channel <br />improvement slopes <br />3-4 feet <br />$7,792,000 <br />$4,970,000 <br />$2,822,000 <br />1.15 <br />8 feet <br />Soil cement, Earth fill <br /> <br />Physical Features <br /> <br />Level of Protection <br />Design Discharge <br />Channel Width <br />Channel Excavation <br /> <br />Channel Invert Slope <br />Depth of Flow <br /> <br />Freeboard <br />Total Project Cost <br />Federal First Cost <br />Local Cost including recreation <br />Benefit-Cost Ratio <br />Average Height of Levee <br />Levee Materials <br /> <br />. <br />) <br /> <br />vii <br />