Central Arizona Project

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  • The Central Arizona Project (CAP) comprises approximately 336 miles of concrete-lined aqueducts, canals, pumping stations, and tunnels that are intended to distribute roughly 1.5 million acre-feet (MAF) of water annually from the Colorado River to the Central Arizona Water Conservation District, which comprises Maricopa, Pinal, and Pima Counties. This area includes the cities of Phoenix and Tucson.

    The CAP has its origins in the competition between California and Arizona for the waters of the Colorado River. On November 24, 1922, the Colorado River Commission issued the Colorado River Compact, which was intended to settle disputes over the Colorado River's waters by allocating specific amounts to individual states and setting priorities for how future squabbles would be settled. Although California, Colorado, Nevada, New Mexico, Utah, and Wyoming ...

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