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<br />portion of State Highway 194 and a few cultivated fields; <br /> <br />* A stop log closure structure where the AT &SF Railroad crosses the levee 6 miles west <br />of the City; <br /> <br />* A double row of steel jacks at critical locations along the levee toe; <br /> <br />* Riprap at critical locations; <br /> <br />* Interior drainage facilities and outlet structures through the levee with slide and flap <br />gates; <br /> <br />The levees along the Arkansas River have a top width of 12 feet which permits access for <br />maintenance. Riverside slope is 3 horizontal to I vertical and landside slope is 2.5 horizontal to <br />1 vertical. The north bank levee has an average height of 14.5 feet with a maximum of 17 feet. <br />The south bank levee has an average height of 13 feet with a maximum of 20.5 feet. <br /> <br />Concrete stop log abutments were placed in the levee 6 miles west of the City where U.S. <br />Highway 50 crosses the levee. Galvanized steel stop logs are stored in a woven wire fenced <br />enclosure 50 feet north of the stop log structure. <br /> <br />A double row of flexible steel jacks were placed at the toe of levees at critical locations. <br />Riprap was placed at the Consolidated Canal river return outlet structure which .lies at the toe of <br />the extreme west end of the levee. Riprap was also placed at the outlet of all interior drainage <br />structures. <br /> <br />Interior ponding facilities consist of drain ditches along the landside toe: of the levee to <br />collect and transport interior rainfall runoff to designated ponding areas. Ponded water is then <br />conveyed through the levees into the river via gated gravity drainage structures. <br /> <br />!)peration and Maintenance Responsibilitv <br /> <br />After construction was completed on the Project, operation and maintenance <br />responsibilities were turned over to the Arkansas River Conservancy District to insure <br />serviceability of the project. The O&M Manual prepared by the Corps for District use outlines <br />these responsibilities. The District is also responsible for annual operation and maintenance costs. <br /> <br />The O&M Manual for the Project states thaI: stop log closure shall begin when flooding <br />in the Arkansas River rises to 1 foot below the base of the rail. Coordination with railroad <br />officials shall begin when the river starts rising, especially if it is known that heavy rains are <br />occurring upstream. No local early warning system was installed. The existing network of <br />precipitation and stream gaging stations in the Arkansas River basin above Las Animas is <br />adequate to provide warning of impending flood conditions. The National Weather Service issues <br />severe weather warnings and flood watches and warnings. <br /> <br />6 <br />