present route of U.S. 93 uses the top of Hoover Dam to cross the Colorado
River. U.S. Highway 93 is the major commercial corridor between the states
of Arizona, Nevada, and Utah; it is also on the North American Free Trade
Agreement (NAFTA) route between Mexico and Canada. U.S. 93 has been
identified as a high priority corridor in the National Highway System
Designation Act of 1995. The traffic congestion caused by the inadequacy
of the existing highway across the dam imposes a serious economic burden
on the states of Arizona, Nevada, and Utah.
The traffic volumes, combined with the sharp curves on U.S. 93 in the vicinity of Hoover Dam, create a potentially dangerous situation. A major catastrophe could occur, involving innocent bystanders, millions of dollars in property damage to the dam and its facilities, contamination of the waters of Lake Mead or the Colorado River, and interruption of the power and water supply for people in the Southwest.
By developing an alternate crossing of the river near Hoover Dam, through-vehicle and truck traffic would be removed from the top of the dam. This new route would eliminate the problems with the existing roadway--sharp turns, narrow roadways, inadequate shoulders, poor sight distance, and low travel speeds.
The purpose of the project is to accomplish the following objectives: