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Show The Bonneville Unit Definite Plan Report^- 3 described a Jordanelle Reservoir with a tentative capacity of 170,000 acre- feet and a surface area of 2,100 acres. At present the planned capacity is expected to be increased to 320,000 acre- feet or greater. The surface area of a 320,000- acre- foot capacity reservoir would be 3,068 acres. Land to be acquired for rights- of- way and construction purposes would include an estimated U, U00 acres of privately owned land, 80 acres of State land, and kdO acres of Federal land. An artist's concept of Jordanelle Dam and Reservoir is shown in Figure A- 27. The borrow areas for impervious materials for the dam embankment are expected to be located primarily in the reservoir basin below the normal water surface. Pervious river channel materials for the dam would be obtained from along Provo River Valley floor, within 2 miles hauling distance upstream from the proposed axis. Most of the area would be below the normal water surface of the reservoir. Riprap material could be obtained from the existing rock quarry located near Lemon Grove on Provo River about 9 miles upstream from the damsite. This lava flow rock ( andesite porphyry) was used on Provo River channel improvement work. Riprap might be obtained from within the reservoir basin; however, explorations would be required to determine this. Concrete aggregate would be obtained from commercial pits located in the Salt Lake City or Provo areas. Part of U. S. Highway U0- l89 and U. S. Alternate 189 would have to be relocated ( Fig. 28) to clear the construction site and backwater area in the reservoir. The water would reach to the north approximately 3.2 miles up U. S. Highway 1+ 0- 189 toward Silver Creek Junction and would inundate that much of the existing highway. The proposed realinement would be west of and generally parallel to the present U. S. 1+ 0- 189 on the west shoreline of the reservoir. The alinement for U. S. Alternate 189 runs easterly toward Francis, south of and generally parallel to the present roadway on the south shoreline of the east arm of the reservoir. The U. S. k0- l89 realinement would provide good access to the reservoir for recreation purposes and to the existing mines now in operation in the area. The construction of the proposed dam and reservoir would necessitate the relocation of 19.5 miles of Utah Power & Light Company powerlines and a switchyard, and 7.2 miles of Mountain Bell telephone lines. 92 |