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<br /> <br />1 <br /> <br /> <br />1 <br />difference of 270,000 acre-feet per year. This value would represent theoretical depletions <br />from the Duchesne River system from all human activities caused by man. <br />The average yearly flow difference between the USBR flows and the Randlett gauge are <br />shown below for various periods of record. <br />Table ES-2 <br />Yearly Flow Difference (Between USBR Pre-Development Recommendations and Randlett) <br />Period USBR Avera$e,Flow Randlett Gauge Flow' Difference:(Depletiorts} <br />1912-1990 768,023 497,963 270,040 <br />1912-1970 787,836 528,033 259,803 <br />1970-1990 741,621 399,170 342,451 <br />' Flow Analysis of the Duchesne River With Fu!! Bonneville Unit <br />Operation <br />The Strawberry Aqueduct of the Bonneville Unit of the CUP diverts water from the <br />Duchesne River Basin into the Great Basin via Strawberry Reservoir. The Starvation <br />Collection System diverts water into Starvation Reservoir for distribution in the Uintah <br />Basin. The Bonneville Unit has been under construction for over 30 years. Diversions into <br />Strawberry Reservoir began in December 1971, with small amounts of water delivered to <br />the reservoir until 1985, with the completion of remedial work at Soldier Creek Dam. <br />Completion of the entire collection system did not occur until final work at Stillwater <br />Reservoir was completed in 1989. Bonneville Unit project deliveries to Strawberry <br />Reservoir have been at capacity since 1989, with the exception of minor releases at Rock <br />Creek due to remedial work on the Upper Stillwater Dam. Diversion into Starvation <br />Reservoir began in December 1969. The Bonneville Unit depletions from the Duchesne <br />River average 143,200 acre-feet annually. <br />1 <br />1 <br /> <br /> <br /> <br /> <br /> <br />Flow Analysis of the Duchesne River With Uintah Basin <br />Replacement Project Proposed Operation <br />The Uintah Basin Replacement Project (UBRP) is a water development project proposed by <br />the CUWCD to replace the Upalco and Uintah Units of the CUP in northeastern Utah. The <br />project will, in part, assist the Ute Indian Tribe of the Uintah and Ouray Reservation in the <br />development and management of water resources. The project will also provide early and <br />late season irrigation water, and water for environmental purposes for fishery flows. The <br />UBRP consists of two units, the Upalco and Uintah Units. <br />The UBRP is expected to impact the lower Duchesne River by depleting additional flows <br />from the river. These total expected depletions are shown in the table below. <br />SLC113470TREPTI.DOC ES - 3 <br />