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Alternative 2— Modify Existing Temporary Structure <br /> The second alternative would be to modify the existing temporary structure to improve <br /> functionality. First, a slide gate should be added to the level control outlet pipe to allow <br /> sediment to be flushed through the spillway. This would also allow the ditch superintendent <br /> additional control over river returns. Second, an alternative trash rack design (beehive or <br /> similar) could be used on the level control to improve debris removal. An access bridge <br /> would also improve access to the level control for maintenance and allow operation of the <br /> proposed gate. Finally, the existing failed concrete spillway would be demolished and <br /> removed, and additional stabilization added to the canal banks and earthen plug. The total <br /> cost for Alternative 2 was estimated to be approximately $61,000 (cost estimate provided in <br /> Appendix D). <br /> September 2014 Draft <br /> Page 112 <br />