From The St. George Spectrum (David Clark):
All Colorado River basin states have the right to develop and use their water, in accordance with the compacts that form the basis for the Law of the River. They can do so whenever in time the need arises.
Utah is entitled to 23% of the water available to the Upper Basin. Unlike the Lower Basin states (Nevada, Arizona and California), the Upper Basin states (Colorado, New Mexico, Wyoming and Utah) receive a percentage of available water rather than a set acre-foot volume so their water supplies are adjusted based on actual flows. Utah’s annual compact allocation is 1.725 million acre feet, but its annual reliable supply (or the amount of water available for development after considering climate variability) is approximately 1.4 million acre feet — or, 80% of what was allocated to the state in the compacts.
Utah currently uses less than 1 million acre feet of Colorado River water — well under its annual reliable supply. Utah’s rapid population and economic growth has necessitated that the state develop its available water resources. Utah’s development of its currently unused Colorado River water complies with the law and does not jeopardize other state allocations.
For nearly two decades, Utah has studied the Lake Powell Pipeline (LPP), a $1.4 billion project that would deliver 6% of its annual reliable supply of river water to the state’s driest and fastest-growing region — Washington County.
Washington County has reduced its per-capita use by 30% while nearly doubling its population from 2000-2018. Additional conservation reductions are planned. County water use is comparable to other desert communities when calculated using similar methodologies.
The Bureau of Reclamation recently released its draft Environmental Impact Study on the LPP and determined that the project is needed, the water is available and there are few environmental impacts.
Individuals who suggest Colorado River basin states should “challenge” Utah’s use of its water fail to understand the Law of the River, which authorizes each state to develop and use its respective share.