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7 SUM~~RY (Continued) much higher than riny other land in that block, Reclama- tion determined that a separate hooster pumping plant for that area, the Delivery 23.0 PUl'lpil1g Plal1t, would be the more economi.cCil alternative to lncreasing the pipe size of the entire Cahone delivery system. The pumpil1g plant will have a maximum capacity of 2.4 cubic feet per second (cfs) to irrigate 160 acres of full service land on the Cahone system of the Dove Creek are8. 4. After the McPhee and Towaoc Powerplants were added to the project in 1981, further analysis revealed a need to modify their capacities. For the HcPhee Powerplartt, tur- bine design capacity was based on releases of 25 to 75 cfs. In 1981, the normal minimum design capacity was a 50-cfs turbine. Since then, Reclamation has determined that more efficient use of the water could be made by in creasing this design capacity to 75 cfs and that addi tional flexibility could be gained by using a combination of two turbines and one generator. Consequently, the capacity of the McPhee Powerplant has been increased from 990 kilowatts (kW) to 1,350 kW. A reanalysis of the Towaoc Powerplant revealed that increased capacity could be obtained by using a turbine with less head loss and reduced maximu!'l static head losses. Subsequently, the powerplant capacity has been increased from 10,500 kW to 12,200 k\~. 5. Some refinements have been !'lade to the operation, mainte- nance, and replacement of the project since 1977. To pro- vide a time ly and coordinated operation of the water storage and conveyance facilities on the delivery system of the project, a computerized Programmable Master Super- visory Control System would be used to automate the opera- tion. This system would perform selected control func- tions at predetermined times and interpret control func- tions on the Great Cut Pumping Plant; the checks along the Dove Creek, South, and Towaoc Canals; the six sprinkler- head pemping plants; and the two powerplants. In addi- tion, this system would allow monitoring and remote con- trolling of the releases from McPhee Dam. The operation of project canals will be based on a scheduled delivery concept. Irrigators will order water in advance. In addition, pumping plants and checks along the canals will contain instruments to monitor changes in water demand downstream and automatically adjust to meet these changes. S-5