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0': L" ~ ~ c Ed \'11S SUMMARY SHEET Domin~uez Reservoir Proiect LOCATION The Dominguez Reservoir Project is located in west- central Colorado in Delta and Mesa Counties, between the cities of Grand Junction and Delta. PURPOSE The multipurpose project would develop water of the Lower Gunnison River. a major tributary of the Colorado River. for hydroelectric power, municipal and industrial use. recreation, and fish and wildlife enhancement. ~ The Dominguez Reservoir Project was authorized. for investigation by the Water Resource Developments, Feasibility Studies Act of October 27. 1972 (Public Law 92-577), Feasibility investigations were initiated in January 1975 with the formation of a multi-objec- tive planning team. The investigations were conducted in accordance with the Principles and Standards for Plannin$t Water and Related Land Resources developed by the Water Resources Council. The team studied a number of alternatives which are discussed in a combined field draft feasibility report/environmental statement prepared in December 1981. Alt.ernatives presented as candidate plans were the (1) Nonstructural. (2) Environmental Quality Emphasis. (3) Peaking Power. and (4) Municipal and Industrial Water Plans. Plans 1 and 2 are very limited development alternatives while 3 and 4 call for construction of large dams. reser- voirs. and poW'erplants. Also presented for comparative purposes was the future without or nondevelopment scenario. The peaking power proposal was originally selected as the recommended plan and invest igate.d at the feasibility level. Under this plan the project could satisfy the needs for municipal and light industrial water. baseload and peaking power, recreation, and water quality improvement. It received broad local support. More recent studiesJ however. indicated the future need for peaking power would be less than earlier predicted. This situation coupled with the fact that there are abundant energy resources in western Colorado which, if developed. would create a demand for large quantities of H&I water. prompted formulation at appraisal level of the municipal and industrial water plan to satisfy that potential need. This plan provides for future H&I water needs associated with the growing communities and potential energy- related developments along the Colorado River. However, explicit interest for this amount of H&I water and a willingness to pay for it have not been identified. It is not possible at this time for Reclamation to recommend either plan for construction. A planning report is now being prepared, to conclude the study and preserve the data developed. ~ Plans 3 and 4 both provide for the construction of Dominguez Darn. an earthfill structure, on the Gunnison River just upstream from the community of Whitewater. The primary purpose of plan 3 would be the generation of electrical power at peak demand times. while the emphasis of plan 4 would be to ensure a water supply for Colorado's potential energy and industrial developments and the sup- porting urbanization. The plan currently favored by the Mesa County Dominguez Reservoir Advisory Council is No.4, the H&I Water Plan. In both plans a conventional powerplant would be situated at the base of Dominguez Dam. Those plants would have maximum capacities of 18 and 36 megawatts. and would produce about 136.000,000 and 159.000,000 kWh of energy annually. respectively. !( GRAND JUNCTION ."r ~I 'R., a I J Pipeline I I I WHITEWATER 8 PO\llerPlant <) PumpinQ Plant N. , l' ~\.. ! j :J I@ ~~~p-:. v.1 I{ ~ ~\ ' ~ it. ~ I J>.. DOMINGlJEzvf< ____' RESERV~OIR GI'/~/-r;\ I '<i.:v' '\ I ') ~~:\ "'"'' '"'' ~~ f/ ,,~ \\ ~~'" I' j/;:;;:;"v II ..~ 1/ II .a RIM BASIN RES. PUMP-BACK STORAGE <' _' c.~ ~E.'!>""" cO>,)'" o~...,... PEAKING POWER PLAN I: DOMINGUEZ RESERVOIR PROJECT PLAN I i 20