canal for Pelican Lake Reservoir; a 6-mile extension of the present Yellowstone Canal, now serving the Moon Lake project, to Uinta River; a 3-mile canal from Lakefork River to Yellowstone Creek above the head of the Yellowstone Canal; and a canal from Rock Creek to the Blue Bench and Lakefork River.

Fruitland project.-A storage reservoir of 4,000 acrefeet capacity on Red Creek, a tributary of Strawberry River, with extensions of present service canals would provide water for the irrigation of 1,600 acres of new land and 400 acres lacking an adequate supply near Fruitland, Utah.

Castle Peak project. A canal 34 miles long, heading at Duchesne River near Duchesne, Utah, could carry water to 21,700 acres of new land and 2,100 acres of land now insufficiently irrigated on south Myton Bench. Water could be stored for late season use in reservoirs at the Hades site (25,000 acre-feet capacity) on the North Fork of Duchesne River and at the Starvation site (65,000 acrefeet capacity) on Strawberry River, or at alternative sites on tributaries of the Duchesne River above the canal heading.

Mosby project.-Water from Whiterocks River imported by a canal into Deep Creek could be stored in a reservoir of 13,000 acre-feet capacity at the Crow Creek site on Deep Creek to irrigate 3,800 acres of new land and provide supplemental water for 400 acres located about 12 miles west of Vernal, Utah.

Vernal project. Storage of Ashley Creek water in Stanaker Reservoir, a potential offstream reservoir of 34,000 acre-feet capacity, would be used to irrigate 1,900 acres of new land and furnish a supplemental supply to 22,300 acres of cultivated land near Vernal. In addition to a dam to impound water in Stanaker Reservoir short feeder and service canals would be needed.

Jensen project.--A reservoir of 6,000 acre-feet capacity at the Tyzack site on Brush Creek would provide sufficient storage to supply 3,600 acres of irrigated land with additional water and 800 acres with a full amount near Jensen, Utah. Existing canals could distribute the water.

Minnie Maud project.-A supplemental water supply could be furnished 800 acres of irrigated land bordering Minnie Maud Creek along the Duchesne-Carbon County boundary by storage in a small reservoir (550 acre-feet capacity) at the Minnie Maud site on Minnie Maud Creek.

Green River pumping project.-By pumping water from Green River with lifts of about 40 feet, 11,000 acres of dry land and 1,000 acres of irrigated land between Jensen and Ouray, Utah, could be adequately irrigated. With the present wide fluctuations in river flow, diversion dams cannot be maintained and occasionally part of the area is inundated. Future upstream power reservoirs would smooth out the flow and make pumping for irrigation practicable.

Echo Park project.—Three and one-half miles downstream from the confluence of the Green and Yampa Rivers is Echo Park dam site. It is in Colorado only 2 miles east of the Utah State line. The river elevation at the site is 5,048 feet above sea level. A dam to raise the water surface 500 feet would impound 5,560,000 acre-feet of water (4,710,000 acre-feet active capacity) and would control the flow at that point. The reservoir would extend up Green River 64 miles to Red Canyon and up Yampa River 44 miles to Lily Park. A number of suspected archeological sites along the Yampa River should be thoroughly explored prior to filling the reservoir. A power plant installed at the dam would have a capacity of 120,000 kilowatts and would be capable of producing annually 668 million kilowatt-hours of energy. In addition to power, this multiple-purpose project would provide hold-over storage, flood control, silt retention, and recreational opportunities. During a succession of dry years releases would help meet the stream flow requirements at Lee Ferry specified by the Colorado River Compact. Transcontinental highway US 40 is only 20 miles south of the site and would afford easy access to the area for vacationists.

Split Mountain project.-Below Echo Park, the Green River leisurely divides and unites several times to form large islands, giving rise to the name "Island Park." It then flows through Rainbow Park and Little Park to Split Mountain, so named because the river has split the mountain in half. A dam at the head of Split Mountain Canyon at river elevation 4,930 feet could raise the water surface 118 feet, backing water up to the Echo Park Dam and forming a reservoir with a capacity of 320,000 acrefeet (295,000 acre-feet active capacity). Stream flow would be regulated by the upstream Echo Park Reservoir. A power head of 200 feet could be utilized by means of a pressure tunnel in three sections extending from the dam 8.3 miles downstream to a power plant, 5 miles up the river from Jensen, Utah. With an installed capacity of 90,000 kilowatts, this plant could produce 846 million kilowatt-hours of firm energy annually.

Central Utah project.-An exportation of 625,000 acre-feet annually could be made from streams in the Uinta Basin to the Bonneville Basin in Utah. A collecting conduit would intercept flows of Brush Creek, Ashley Creek, and the Duchesne River and their tributaries, delivering the water by gravity flow to the Strawberry Reservoir which would be enlarged to a capacity of 1,300,000 acre-feet. Releases from the reservoir would be made through a tunnel into Diamond Fork of Spanish Fork River where a 2,900-foot drop could be utilized to generate electricity before the water is reregulated and used for irrigation in the Bonneville Basin.

Water could be pumped from the potential Echo Park Reservoir on Green River to replace irrigation supplies now used on lands in the Uinta Basin which would be

diverted to the Bonneville Basin under this project and to permit expansion of irrigation in the Uinta Basin.

The construction of this project would eliminate the Rock Creek Tunnel project and also would make unnecessary most of the structures otherwise required for the Moon Lake extension, Fruitland, Castle Peak, and Mosby projects.

Rock Creek Tunnel project. Construction of this project would bring additional water from the Colorado River Basin watershed into the Bonneville Basin. By means of a 9-mile tunnel from Rock Creek, a tributary of Duchesne River, to upper Duchesne River, 45,000 acre-feet of water annually could be brought into the Duchesne River and thence carried by the Duchesne tunnel to Provo River. The Duchesne tunnel, a feature of the Provo River project, is a 6-mile tunnel under construction to bring 32,000 acrefeet annually from the Duchesne River to Provo River. It would be lined with concrete to reduce friction losses and accommodate the larger flow brought from Rock Creek. If replacement storage were provided for Uinta Basin lands, additional summer flows of approximately 8,000 acre-feet from Duchesne River and Rock Creek could be diverted into the tunnels.

Price and San Rafael River Basins

Five projects are outlined as possibilities for development of water resources in these basins. Four small transmountain diversions are also discussed.

Emery County project.-A reservoir of 57,000 acrefeet capacity of the Joes Valley site on Cottonwood Creek, a tributary of the San Rafael River, and a highline canal from Cottonwood Creek to Huntington Creek would provide ample irrigation service to all lands under present canals from the two streams, including 20,000 acres now insufficiently irrigated and 3,300 acres of dry land in the vicinity of Huntington and Castle Dale, Utah. By impounding spring run-off and thus providing compensating storage in late season for the irrigation of lands with appropriated water rights, this reservoir would make possible increased transmountain diversions from Huntington and Cottonwood Creeks through existing works.

Buckhorn project. By the enlargement and extension of the Cleveland canal to carry surplus waters of Huntington Creek to a potential reservoir of 15,000 acre-feet capacity at the Buckhorn site, 3,800 acres of new land about 12 miles east of Castle Dale, Utah, could be made productive with irrigation.

Gunnison Valley project.-West of Green River, Utah, are 3,800 acres of irrigable land that could receive water from Green River with a 280-foot pump lift. East across the river are 430 acres requiring only a 50-foot pump lift, and 6,600 acres that could be reached by pumping a maximum of 370 feet. Inexpensive power for pumping

could be obtained from the development of nearby power sites on the Green and Colorado Rivers.

Desolation Canyon project. Of several dam sites in Desolation Canyon of the Green River suitable for power production the Upper Three Canyan Creek site appears to be the best. It is 50 miles by river upstream from Green River, Utah. A dam to raise the water surface from a present elevation of 4,400 feet up to 4,650 feet would back water upstream to a point just above the White and Duchesne Rivers, creating a reservoir with a total capacity of 900,000 acre-feet and an active capacity of 700,000 acre-feet. The reservoir would regulate the inflow to Green River below the Echo Park Dam with only occasional spills. A power plant in the dam with an installed capacity of 78,000 kilowatts could produce 433 million kilowatt-hours of firm energy annually.

Rattlesnake Power project. The Rattlesnake Dam site, lowest power site on Green River, is 22 miles upstream from Green River, Utah. A dam to raise the water surface 250 feet above its present elevation of 4,150 feet would create a reservoir with a capacity of 500,000 acrefeet, 370,000 acre-feet of which would be active capacity. The power plant would have an installed capacity of 78,000 kilowatts and an anual firm production of 434 million kilowatt-hours.

Gooseberry project. From a 17,000 acre-foot reservoir at the Mammoth site on Gooseberry Creek, a tributary of Price River, about 11,500 acre-feet of water could be di verted anually westward through a tunnel 2.3 miles long to irrigate fertile lands in the Sanpete Valley of the Bonneville Basin.

White River diversion project.-The exportation of 2,700 acre-feet of water annually from the White River, a tributary of the Price River, to Spanish Fork River for irrigation of lands under the Strawberry Valley project in the Bonneville Basin would be possible by the reconstruction of an abandoned canal. Three small reservoirs on tributaries of the Price River could provide replacement storage for the Price River lands and thus increase the possible diversion to 4,200 acre-feet.

Ferron-Manti Creek diversion project. This is one of the two tunnel diversion possibilities that exist to take water from the head of Ferron Creek, a tributary of the San Rafael River, to lands in southern Sanpete Valley in the Bonneville Basin. No stream flow records are available but it is estimated that an average of 15,000 acre-feet of surplus water may be exported through the two tunnels. One tunnel 2.2 miles long would bring water to Manti Creek. En route to irrigate lands this water could be used in two existing municipal power plants having combined heads of 2,974 feet.

Ferron-Twelve Mile Creek diversion project.-A tunnel extending 1.8 miles to Twelve Mile Creek would make possible the other diversion from Ferron Creek, thus help