After a decade of deliberation, in 1964, the Supreme Court’s decree favored Arizona, upholding its designated 2.8 million acre-feet of water a year share of

The U.S. Mexico Water Treaty was signed in 1944 and apportioned 1.5 million acre-feet of water a year of Colorado River water to Mexico and

The Boulder Canyon Project Act was signed in 1928. It authorized construction of Hoover Dam and apportioned Colorado River water among the Lower Basin states:

In the Colorado River Basin in 1922. . .the Law of the River began! The Colorado River Compact of 1922 was approved on Nov. 24,

The calendar may not say it’s 2023 yet, but for “water wonks” (those folks who are really into hydrology), it is! The 2023 Colorado River

CAP’s Mark Wilmer Pumping Plant is the first plant in the CAP system and it is also the largest, featuring six 66,000 horsepower pumps that

The 336-mile CAP canal is shaped like a trapezoid. Why? The short answer: CAP’s specific trapezoidal shape is a balance of hydraulic efficiency and constructability.