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Alternatives Evaluated A range of alternatives were considered including 1) Don't build the project, 2) Repair the structure saving as much of the old structure as possible, and 3) Completely remove the old structure and replace it with a new structure. A subjective evaluation of the alternatives follows: 1. Don't build the project: Existing water control structure will eventually fail. This will permit uncontrolled flows during the flood events. The "do nothing" alternative is not feasible! 2. Repair the existing structure: Existing concrete has severely deteriorated. Capping existing structure is a temporary measure at best. This may provide a delay in the eventual failure of the structure. This alternative was not selected due to cost of repair and questionable life span of repair. 3. Completely remove the old structure and replace it with a new structure: This is the selected alternative. A new structure with a radial water control gate. This will allow the SLVCC to control the amount of water entering the canal during flood events on the Rio Grande. Natural Resources Conservation Service (NRCS) has provided technical engineering assistance in the evaluation of the above alternatives. The Selected Project The company has decided to replace the existing structure. A preliminary design is attached as Appendix B. The company will completely remove the existing structure and replace it with a new Radial Gate Structure constructed in approximately the same location. Water Rights The company has decreed water rights for 524.78 cfs of Rio Grande Water. Actual diversions for the SLV Canal were 21,495 ac-ft, 41,284 ac-ft and 5,454 ac-ft for 1994, 1995 and 1996 respectively. The State Engineer's Office Annual Water Diversion reports for 1994, 1995 and 1996 are found in Appendix C. 3