FLAGSTAFF — Federal officials say it may be necessary to reduce water deliveries to users on the Colorado River to prevent the shutdown of a huge dam that supplies hydropower to some 5 million customers across the U.S. West. Officials ...

U.S. Interior Secretary Sally Jewell and other officials on Saturday marked the 50th anniversary of power generation by Glen Canyon Dam, a structure that helped usher in a new era in the Southwest.

A federal appeals court ruled Monday that the government did not violate federal environmental law when it failed to subject annual plans for operation of the Glen Canyon Dam to a thorough environmental review.