Throw Back Thursday: Then and Now

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Mark Wilmer Historic

In 1973, five years after the Colorado River Basin Project Act was signed by President Lyndon B. Johnson, construction started on the first pumping plant in the CAP system: Mark Wilmer Pumping Plant. The plant is the largest in the system; its six, 66,000 horsepower pumps lift water more than 800 vertical feet from Lake Havasu into the seven-mile Buckskin Mountain Tunnel. The plant was named for Mark Wilmer, a water rights attorney who argued in the U.S. Supreme Court for Arizona to keep its full entitlement to its 2.8 million acre-foot allocation of Colorado River water.

Mark Wilmer Historic Mark Wilmer Current