PROJECT DESCRIPTION: Las Vegas Valley and the surrounding area draw 90 percent of their water from Lake Mead, the largest reservoir in the U.S. Unfortunately, during the past 14 years the water level in Lake Mead has dropped more than 110 feet putting several existing water intakes at risk of running dry. The Southern Nevada Water Authority addressed the possibility of a water shortage by constructing a new intake tunnel that feeds water from the bottom of Lake Mead rather than the top where levels continue to fall. The three-mile tunnel is connected to a 100-foot tall, 7-foot thick concrete vault that stores water nearly 600 feet below the lake’s surface until being pumped to the surface. After the two-year tunnel excavation, Vegas Tunnel Constructors used 525,000 pounds

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