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<br />Farmers Pawnee Canal Company <br />Updated September 19,2008 <br />Page 3 of5 <br /> <br />Agenda Item 23b <br /> <br />Project Description <br /> <br />A range of alternatives were considered by the Company, including: 1) rebuild components of the <br />secondary flow structure; 2) build a sand gate at the river diversion and rebuild the components of <br />the secondary flow control structure; and 3) replace 100 feet ofthe river diversion structure with a <br />new bladder gate system and leave the secondary structure unchanged. <br /> <br />Alternative 1 - Rebuild the comvonents of the secondary flow control structure: This alternative <br />involved replacing the board gates at the secondary flow control structure with new 8-foot radial <br />gates. Three gates would be required in the ditch and one in the channel back to the river. This <br />would address the efficiency issue but would not correct the sanding problems at the river <br />diversion. The cost of this alternative is $105,000. <br /> <br />Alternative 2- Build sand gate at river diversion and rebuild comvonents of secondary flow control <br />structure: This alternative consisted of replacing a portion of the concrete wall system in the river <br />channel with a new 12-foot radial gate. The gate would reduce the sandbar problem throughout the <br />year because sand could be flushed through the system. This alternative also consisted of replacing <br />board gates at the secondary flow control structure with new eight foot radial gates. Three gates <br />would be required in the ditch and one in the channel back to the river. This would correct the <br />efficiency problem and the sanding problem. The cost of this alternative is $250,000. <br /> <br />Alternative 3 - Replace 100 feet of the river diversion structure with new bladder gate svstem: This <br />alternative consisted of only replacing a portion of the river diversion. A 100- foot section of bladder <br />gate would replace part of the existing concrete wall system and the remaining structures would be <br />left intact. This alternative would only reduce the sandbar issues. The cost of this alternative is <br />$850,000. <br /> <br />Selected Alternative: The Company has chosen Alternative 2: <br /> <br />12-foot wide radial gate to replace a portion of the concrete wall system in the river <br />channel <br />Sheet piling under the gate structure for stabilization and protection from undercurrents <br />Four 8-foot wide radial gates to replace the board gates at the secondary flow control <br />structure <br /> <br />The Project design is expected to be completed by October 1, 2008. Construction is anticipated to <br />begin around November 1,2008 with completion by the end of November 2008. <br />