Las Vegas Running Out of Water Means Dimming Los Angeles Lights

(Bloomberg) - On a cloudless December day in the Nevada desert, workers in white hard hats descend into a 30- foot-wide shaft next to Lake Mead.

As they’ve been doing since June, they’ll blast and dig straight down into the limestone surrounding the reservoir that supplies 90 percent of Las Vegas’s water. In September, when they hit 600 feet, they’ll turn and burrow for 3 miles, laying a new pipe as they go.

The crew is in a hurry. They’re battling the worst 10-year drought in recorded history along the Colorado River, which feeds the 110-mile-long reservoir. Since 1999, Lake Mead has dropped about 1 percent a year. By 2012, the lake’s surface could fall below the existing pipe that delivers 40 percent of the city’s water.