(John Locher | The Associated Press) In this July 16, 2014 file photo, what was once a marina sits high and dry due to Lake Mead receding in the Lake Mead National Recreation Area in Arizona. Several states that rely on a major Western river are pushing for federal legislation to implement a plan to keep key reservoirs from shrinking amid a prolonged drought. The Colorado River serves 40 million people in Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming. Representatives from those states are meeting Tuesday, March 19, 2019, to sign a letter to Congress asking for support for so-called drought contingency plans.