Laserfiche WebLink
2. Do remedial work only to the extent that the diversion <br />is put back into normal operation: <br />This alternative would be an immediate fix to any problem. <br />Remedial activities would produce results with varying <br />design life ranging from a few months to a few years. At <br />times of failure, the ditch is out of service resulting in a <br />potential loss of water to the district. Remedial activities <br />of this nature are impossible to budget for and create an <br />extreme hardship on Bijou. Remedial activities do not fully <br />address the problem with the huge sand bar formed upstream <br />from the diversion. The sand bar in part causes the failure <br />of the river diversion and creates the need for remedial <br />activities. Continuing to perform remedial activities is no <br />longer acceptable to Bijou. <br />3. Replace 100 feet of the river diversion structure with a <br />new bladder gate system and continue to use the existing <br />intake gates: <br />This alternative would consist of replacing part of the <br />river diversion only. A 100 foot section of inflatable <br />bladder gate would replace part of the current board system. <br />The remaining diversion will be left intact. The ditch <br />intake structure would also remain untouched. This <br />alternative would solve problems associated with the current <br />operational status of the diversion. Lowering the bladder <br />gate during times of high river flow will greatly reduce the <br />"wear and tear" on the entire intake system. This structure <br />will greatly reduce the sand bar which forms upstream from <br />the current diversion thus reducing the sanding problem in <br />the ditch. The bladder gate will also alleviate the problem <br />of debris hanging up on the structure. The cost of this <br />alternative is approximately $720,000. <br />4. Replace 200 feet of the river diversion structure with a <br />new bladder gate system and continue to use the existing <br />intake gates: <br />This alternative completes the provisions of alternative <br />number 3 but increases the length of the bladder gate to 200 <br />feet. The increased length of bladder gate would completely <br />alleviate the problems associated with the sand bar and <br />greatly reduce the sanding problem in the ditch. The cost of <br />this alternative is approximately $1,368,000. <br />Feasibi.l:.�:y Study <br />Fi�ou i _:•3ation District <br />DiversioR SlruCture <br />June 2007 <br />3 <br />