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Alte~natives Evaluated <br />A range of alternatives were considered including 1) don't build <br />the project, 2) rebuild the sand gate using a"waterman" style of <br />slide gate, 3) rebuild the sand gate using a conventional radial <br />style gate, and 4) replace 25 feet of the river diversion <br />structure with a new bladder gate system. <br />An evaluation of the alternatives follows: <br />l. Don't build the project: <br />If the project were not pursued, the DSIC would have to <br />continue operating the system like normal. The current <br />system of flushing sand is extremely dangerous to company <br />personnel but is still vital to the operation of the canal. <br />This alternative is not acceptable to the Company. <br />2. Rebuild the sand gate using a"waterman" style of slide <br />gate: <br />This alternative would consist of replacing a portion of the <br />river diversion with a five foot "waterman" slide gate. This <br />alternative would create a platform over top the rollover <br />wall allowing for the safe and efficient operation of the <br />gate. A slide gate of this size may require multiple <br />personnel to operate especially as the older it gets. The <br />cost of this alternative is approximately $80,000. <br />3. Rebuild the sand gate using a conventional radial style <br />gate: <br />This alternative would consist of replacing a portion of the <br />river diversion with a 5 foot wide radial gate. This <br />alternative would create a platform over top the rollover <br />wall allowing for the safe and efficient operation of the <br />gate. This alternative is identical to alternative #2 except <br />for the type of gate. A radial gate can be continually <br />operated by one individual over time. The cost of this <br />alternative is approximately $100,000. <br />4. Replace 25 feet of the river diversion structure with a <br />new bladder gate system: <br />This alternative would consist of replacing part of the <br />river diversion with a 25 foot section of inflatable bladder <br />Feasibility Study <br />Deuel & Snyder Improvement Company <br />River Sand Gate Structure <br />February 20o9 <br />3 <br />