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The Colorado River Compact was negotiated by Colorado River Basin states, creating the Upper and Lower basins, and providing 50 percent of Colorado River’s water to each basin. It also allocated water for Mexico.
The Central Utah Project was proposed as an extended version of the Colorado River-Great Basin Project and included five units: Bonneville Unit, Jensen Unit, Vernal Unit, Upalco Unit, and the Ute Indian Unit.
The Upper Colorado River Basin Compact is negotiated among five upper Colorado River Basin states including Utah. Under this agreement Utah is allocated the right to develop/deplete 23 percent of the upper basin allotment of Colorado River water, or 1.73 million acre-feet.
The first feasibility report for the Central Utah Project containing further refinements and modifications was released and served as the basis for authorizing the initial phase of the CUP in 1956.
The Colorado River Storage Project Act (Public Law 485, 70 Stat. 105) was enacted authorizing four Colorado River main-stem reservoirs and 11 participating projects including the Central Utah Project.
The first Definite Plan Report for the CUP is released containing modifications that reduced trans-basin diversions and reformulated the CUP into two phases: the Initial Phase (Bonneville, Jensen, Vernal, and Upalco units) and the Ultimate Phase (Uintah and Ute Indian units). On March 2, 1964, the Central Utah Water Conservancy District was established by state law to be the local sponsor for the CUP under contract to the federal government.
A deferral agreement was executed among the federal government, Ute Indian Tribe, and CUWCD in which tribal water rights were made available to the CUP for the Bonneville Unit. In addition, a repayment contract for reimbursable costs of the CUP was executed between the United States and the CUWCD.
The National Environmental Policy Act was enacted by Congress requiring the preparation of environmental impact statements for all federal actions that significantly affect the human environment. Reclamation began preparing an EIS on the CUP.
Reclamation completed the first EIS on the Bonneville Unit of the CUP which included a commitment to develop subsequent EIS’s to address the impacts of individual systems of the Bonneville Unit. EISs for the Diamond Fork Power System and Municipal and Industrial System followed.
The Jensen Unit of the CUP was completed. An in-stream flow agreement was executed in February to protect the aquatic ecosystem in streams affected by the Strawberry Aqueduct and CUP collection system by providing minimum stream flow requirements. All planning work ended on the Ute Indian Unit following completion of a concluding report.
Congress enacted CUPCA (P.L. 102-575) on October 30, 1992, providing policy guidance and direction for completing the CUP including transferring all construction responsibilities from Reclamation to the Central Utah Water Conservancy District, while retaining federal oversight. The Ute Indian Unit was de-authorized by CUPCA.
The CUWCD began reformulation of the original Uinta and Upalco Units to develop Ute Indian and non-Indian water resources in the Uinta Basin including two irrigation reservoirs, feeder pipelines, and association diversion works. Construction of Jordanelle Dam, the central component of the Bonneville Unit Municipal and Industrial System was completed and initial filling of the reservoir began.
The Ute Indian Tribe filed a formal objection to the reformulated Uinta and Upalco Units of the CUP and all planning work on the units ended. The Uinta Basin Replacement Project, authorized by CUPCA in 1992 as a contingent plan to develop non-Indian water in the basin, proceeded through planning and was ultimately approved for construction. The Spanish Fork Canyon-Nephi water delivery plan to provide agricultural irrigation to south-central Utah was identified in a draft EIS, but was abandoned following objections by CUP project partner Strawberry Water Users Association.
Construction began on the final reaches of the Diamond Fork System. Planning began on an alternative plan for completion of the Bonneville Unit to be called the Utah Lake Drainage Basin Water Delivery System or ULS.
A final EIS for the Utah Lake Drainage Basin Water Delivery System was approved and the record of decision was signed by the Assistant Secretary for Water and Science on December 22. The Diamond Fork System was completed linking the entire Bonneville Unit.
A Supplement to the 1988 Definite PlanReport for the Bonneville Unit was approved which endorsed the plan for delivery of 101,900 acre-feet of water per year from Strawberry Reservoir to the Wasatch Front. The Department of the Interior and the lessees executed a lease agreement with CUWCD and Heber Power and Light Company for the private development of hydropower at Jordanelle Dam. Construction began in late 2006 and the power plant became operational by summer of 2008.
Uinta Basin Replacement Project, consisting primarily of enlargement of the existing Big Sand Wash Reservoir and construction of the Big Sand Wash Diversion and Feeder Pipeline, was completed. A municipal pipeline from Big Sand Wash Reservoir to the city of Roosevelt, Utah, is still under construction.