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Show 5.5 miles of tunnel would be required through the mountain beneath Loafer Ridge. Spoil from the tunnel section would be located where it would be least conspicuous and would be graded and smoothed to conform as nearly as possible to the existing topography. About 3 miles of the aqueduct between Goosenest and Spring Lake south of Payson would be in pipeline because of the steep slopes. The remainder of the aqueduct, including sections on either side of the pipeline, would be in open canal sections located on rolling bench or valley lands. Mona- Nephi Canal The main section of the Mona- Nephi Canal would extend from the terminus of Wasatch Aqueduct at York Ridge southward along the eastern side of Juab Valley to a point near Levan Ridge. The canal would consist primarily of open sections with several short siphons and conduits. An operating road would be provided on the downhill bank for the entire reach of the canal. Various sections of the canal could be reached by numerous existing short side roads from U. S. Highway 91 which intercept the canal alinement between York Ridge and the Nephi area. The area traversed by the canal is on gently sloping land. Most of the rights- of- way would involve private land. Mona Pumping Plant The Mona Pumping Plant would lift water from Mona Reservoir into Mona- Nephi Canal for irrigation use. The pumping plant would be located near the north end of Mona Reservoir opposite the damsite. ( Physical data on the plant are given in Table A- 6.) The 1.2- mile- long pipeline between Mona Reservoir and Mona- Nephi Canal would also be used to deliver water from the canal to the reservoir, primarily during the non- irrigation season. Mona Reservoir Enlargement Mona Reservoir would be enlarged by constructing a new earth- and rockfill dam on top of the existing small Mona dam, which was built in the early 1900! s by the Elberta Water Users. Under Bonneville Unit operation the reservoir would fluctuate widely from year to year, depending on available water supplies. The reservoir would fill at a steady rate throughout the nonirrigation season, becoming full in April or May of each year. Storage releases would be made throughout the irrigation 79 |
