| OCR Text |
Show the West Mona Canal and laterals, and reduce the capacity and length of Elberta Canal, Mona- Nephi Canal, Mosida Canal and pumping plants, and associated laterals. The supplemental service area would increase from 112,790 acres to 213,170 acres, and the Nephi- Sevier Canal would be constructed to deliver the water to the Sevier River Basin. With this modification, Mona Reservoir enlargement would be reduced by about 8,000 acre- feet and the water surface elevation lowered by about 2 1/ 2 feet. No new facilities would be required to regulate and distribute the water to points of use within the Sevier River Basin. The potential municipal and industrial water supply would be increased from 79,000 acre- feet to 99,000 acre- feet, with the additional supply allocated to Salt Lake County. To develop the additional supply, a larger Jordanelle Reservoir would be required. The height of Jordanelle Dam would be increased by about 50 feet and the crest lengthened by about 500 feet. The capacity of the reservoir impounded by the larger dam would be 320,000 acre- feet, compared to the originally planned capacity of 170,000 acre- feet. The larger Jordanelle Reservoir would provide holdover capacity for the existing public water system and allow an additional 24,000 acre- feet of water from Salt Lake County streams, local groundwater sources, and the Provo River Project to be used on a firm basis, without expensive storage on the frontal streams. Use of more of the Provo River flows stored at Jordanelle Reservoir for municipal and industrial purposes would reduce the Bonneville Unit yield of Utah Lake and necessitate a 3,530- acre reduction of land served in the Mosida area. This would further reduce the full- service area of the Bonneville Unit from 32,900 acres to 29,370 acres. The Pelican Point Pumping Plant and Canal was eliminated from the plan. Pelican Point Pumping Plant was planned to assure that the present Utah Lake Water Users could be supplied water from the lower 3 feet of storage capacity in the lake during drought years. This water has not been required since 1935, and it probably won't be needed in the future. The parties involved are making efforts to stabilize the lake to the " extent that the water from the lower 3 feet of storage capacity would not be used. Lampton Dam and Reservoir, with a 48,000- acre- foot capacity, has been added to the plan to store and regulate return flows and Utah Lake spills for a low- quality industrial water supply. Hobble Creek Diversion Dam and settling pond and the Spring- ville Bypass Canal were added to the plan to divert flood 14 |
