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Four design altematives for the spillway control section configuration were evaluated, as <br />applicable, for each alternate site: <br />IN-1. Construct an open concrete chute spillway with a broad-crested or ogee weir <br />intake section (Station 57+00). <br />IN-2. Construct an open concrete chute spillway with an ogee weir intake section <br />(Station 57+00, 9+00 and 2+00). <br />IN-3. Construct an open concrete chute spillway with a labyrinth weir intake section <br />(Station 9+00 and 2+00). <br />IN-4. Construct a concrete box culvert or pipe spillway with a weir box inlet intake <br />section (Station 9+00 and 2+00). <br />Two design alternatives for spillway chute section configuration were evaluated as <br />applicable for each alternate site: <br />CH-1. Concrete open chute spillway (all spillway site alternatives). <br />CH-2. Combination concrete open chute and box culvert or pipe spillway chute (weir <br />box spillway intake, Stations 9+00 and 2+00). <br />The locations for the spillway alternatives are shown on Figure 2. <br />Based upon the engineer's prior evaluations of energy dissipators for projects with spillway <br />discharges in the range of 2,500 cfs, the SAF dissipator was determined to be the most <br />economical design for this project. No additional energy dissipator evaluations were <br />performed for this feasibility study. <br />10 <br />