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" 2-03 Agreements. The following agreements were executed in connection with this project. A copy of each agreement is contained in Appendix B. a. Agreement Between the United States of America and the Holly Flood Control, Drainage and Sanitation District for Local Cooperation with the United States of America in the Holly, Colorado, Flood Control Project, executed on 7 September 1978. b. Agreement Between the State of Colorado, State Department of Highways, Division of Highways and the Holly Flood Control, Drainage and Sanitation District of Prowers County, Colorado, relating to construction and maintenance of flood protection near Holly, prowers County, Colorado, dated 23 April 1979. c. Agreement Between the Atchison, Topeka and Santa Fe Railway Company and the Holly Flood Control, Drainage and Sanitation District of prowers County, Colorado, relating to construction and maintenance of flood protection near Holly, prowers County, Colorado, dated September 24, 1979. 2-04. Brief Description of Project. The town of Holly is on the north bank of the Arkansas River at the confluence of Wild Horse Creek, a north bank tributary, Two Butte Creek, a south bank tributary, and the Arkansas River. The two tributary streams join the Arkansas River at approximately river mile 1,106. The Holly Flood Control Project consists of a levee which protects the town and adjacent lands from standard project flood flows originating on the three watersheds. From the point of beginning, north of Holly, the levee extends south along the east bank of Wild Horse Creek to its junction with the Arkansas River, where it turns east following the north side of the river to the point of termination, east of Colorado State Highway 89. The levee extends downstream a sufficient distance to prevent backwater from entering the town behind the levee. The amount of freeboard provided above design maximum water surface varies from 4 feet, north of the A.T. & S.F. Railroad tracks, to 5 feet, in the reach between the railroad and Highway 89, to 3 feet east of the highway. The 5-foot freeboard accounts for the contingencies that might arise from Two Butte Creek flowing from the south. Levee bank protection against erosion consists of riprap placed along the Arkansas River on the reach opposite the mouth of Two Butte Creek and on the abutments of bridges across Wild Horse Creek Ramps are provided at the levee crossing of a county road and Highway 89 and stoplog closure structures at the levee intersections with U.S. Highway 50 and the A.T. & S.F. Railroad to provide continuity in the levee during high flood stages. Interior drainage facilities consist of two ponding areas which collect interior rainfall runoff. Ponded water is then conveyed ~hrough the levee into the river via gated gravity drainage structures. Other areas behind the levee drain naturally toward the east and into the Arkansas River. 2