OCR Text |
Show contract with Utah Power & Light Company would provide for this interconnection between Bonneville Unit power- plants and the CRSP transmission system. Each powerplant of the Diamond Fork Power System would have its own switchyard and, in addition, a switchyard for the system would be located near Sixth Water Powerplant. The switchyard locations and sizes are shown in Figure A- 19. d. Irrigation and Drainage System Irrigation water would be used primarily as a supplemental supply to assist those farmers who are now operating with an inadequate supply. About 213,170 acres of land in the 12- county area would receive a supplemental supply, and about 29,370 acres of new land would receive a full supply. The new lands would be entirely in Utah and Juab Counties. The bulk of the new land in Utah County would be in the Provo Bay area as a result of diking the eastern arm of Utah Lake and in the Mosida area just west of Utah Lake. In Juab County the new lands would be located along U. S. Highway 91 from York Ridge at the northern end of the county to the town of Nephi. Strawberry Reservoir water released through Diamond Fork Power System during the nonirrigation season would be stored in Utah Lake, the proposed Hayes Reservoir, the proposed enlarged Mona Reservoir, and the existing Sevier Bridge Reservoir for later use during the irrigation season. Summer season releases through the power system would mostly be used directly for irrigation, with a small amount for municipal and industrial purposes. Diamond Fork, Spanish Fork River, Wasatch Aqueduct, Mona- Nephi Canal, Nephi- Sevier Canal, and Sevier River would convey water from the powerplants and reservoirs to lands in Utah, Juab, and Millard Counties and by exchange to Sanpete and Sevier Counties. Wasatch Aqueduct would extend southwest from the Dyne Powerplant to York Ridge- the divide between Utah and Juab Counties. Mona- Nephi Canal would continue south from York Ridge to Nephi. During the nonirrigation season some water would be released from Mona- Nephi Canal for storage in Mona Reservoir, and would be pumped back to the canal by Mona Pumping Plant during periods of peak irrigation demands. At Nephi water would be pumped by Nephi Pumping Plant from Mona- Nephi Canal to Nephi- Sevier Canal, which would continue to the existing Sevier Bridge Reservoir. Sevier River augmentation would be regulated and delivered to points of use by existing facilities. The average top width of these canals would range from 20 to k2 feet and the average depth from 3.5 to 7.0 feet. Water depth and velocity would range from 1.7 to 1+. 5 feet and 1.5 to 2.1 feet per second, respectively. 71 |