C153379 Feasibility Study - Laserfiche WebLink

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vi I I I I I I I I I I I I I I I I I I I PRELIMINARY RESERVOIR DESIGN Two reservoir sizes were established reflecting a project with a flood control function and a project without a flood control function. Both pro- jects would have identical amounts of dead, inactive and active storage up to elevation 4566.5 which reflects a total volume of 483,000 ac-ft of storage. The 483,000 ac-ft includes 26,000 ac-ft of inactive storage, 57,000 ac-ft which could be transferred from Empire Reservoir and Riverside Reservoir to Hardin as well as 400,000 ac-ft of new conllervation storage. For the project with a flood control function, a 200,000 ac-ft storage zone would be placed on top of the active lltorage zone for flood storage up to elevation 4577.5 where the crest of the principal spillway is located. Sur- charge storage up to elevation 4606.5 is required to pass the inflow design flood reflecting a total storage volume of 1,491,500 ac-ft. For the project without flood control, the principal spillway crest would be located at elevation 4566.5, above which the surcharge storage is provided up to eleva- tion of 4600.5 reflecting a total storage volume of 1,268,000 ac-ft. The major cost impacts on the reservoir would be railroad relocation/ reconstruction followed by U.S. Highway 34 relocation/reconstruction. The Monfort feedlots would continue at the present location, protected by a levee for very infrequent high reservoir water levels. The town of Kersey would remain unaffected since the maximum water level is lower than the town. SCHEDULE A project on-line date of early 1993 would be feasible if a decision were made by mid-1983 to continue detailed studies. A potential schedule of activities for planning, design and construction was developed starting in mid-1983 and ending with a projected on-line date of early 1993.