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The Vernal Unit, completed in 1962, provides supplemental irri. gation water to about 15,000 ac- res of land in Ashley Valley by storing the high flows of Ashley Creek for late season use. Flows of Ashley Creek are diverted at Fort Thornburgh Diversion Dam through the 3-mile-long Steinaker Feeder Canal for storage in Stein- aker Reservoir. This off-stream reservoir, 3.5 miles north of Ver. nal, has a total capacity of 38,000 acre-feet. Storage water from the reservoir is distributed through the Steinaker Service Canal. Pro- ject lands that previously received a partial water supply from the unregulated flows from Ashley Creek, and frequently suffered crop failures, are now assured a reliable water supply. The Vernal Unit also furnishes municipal wa- ter for the communities of Ver- nal, Naples, and Maeser. Recrea- tion and fishing facilities have been provided at Steinaker Res- ervoir. Upalco Unit Advance planning of the Upalco Unit is being completed with con- struction scheduled to follow in 1978. The unit, located in Duch. esne County, is planned to pro- vide supplemental irrigation wa- ter for about 43.000 acres of In. dian and non-Indian lands along Lake Fork River. 1t will also in- clude some municipal and indus- trial water. Also included in pro- ject benefits are recreation, fish and wildlife enhancements, and flood control. ~ ^'>~ ~~""'''_~_J ~- ~ <--r:. - .....~.I~\i'~ ~ ....--- A'J"" ~,..... ....'" 'l- "'4~;;; '\ l~,__ ----I \.~ I ' v - Taskeech Reservoir on Lake Fork River, with a 78,400-acre-foot- capacity. is the major feature of the unit. It will store unappro- priated flows of Lake Fork and Yellowstone Rivers. Boneta Div- ersion Dam on Yellowstone River will divert water through the 8.5- mile-long Taskeech Feeder Canal to Taskeech Reservoir. Stored- water from the reservoir will be released into the 3.6-mile long Taskeech Service Canal and del- ivered into Lake Fork River for distribution through existing can. al systems.