The valve had been in service since 1971 but can no longer draw water, according to the Southern Nevada Water Authority, which is responsible for managing water resources for 2.2 million people in Southern Nevada, including Las Vegas.
Photos taken Monday show the eldest of the agency’s three intake valves high and dry above the water line.
“When the lake hit 1060 (feet above sea level), that’s when you could start to see the top of the intake number one,” said Bronson Mack, public outreach officer for the Southern Nevada Water Authority.
Lake Mead hit 1,060 feet above sea level on April 4 and stands at 1055 feet as of Wednesday, he said.
As a result, the water authority has begun operating new, low-lake pumping station for the first time — a valve situated deeper at the bottom of Lake Mead. The station, which began construction in 2015 and was completed in 2020, is capable of delivering water with the lake at a much lower level, and was built to protect the region’s water resource in light of worsening drought.
“There was no impact to operation’s ability to deliver water,” Mack said. “Customers didn’t notice anything. It was a seamless transition.”
Water flowing down the Colorado River fills Lake Mead and Lake Powell — another critical reservoir in the West — and the river system supports more than 40 million people living across seven Western states and Mexico. Both reservoirs provide drinking water and irrigation for many communities across the region, including rural farms, ranches and native communities.
The West is in its worst drought in centuries, scientists reported Monday. A study published in February found the period from 2000 to 2021 was the driest in for the region 1,200 years.
The human-caused climate crisis has made the West’s megadrought 72% worse, the study noted.
“We’re kind of in some uncharted territory, socially and economically,” Justin Mankin, assistant professor of geography at Dartmouth College and co-lead of the National Oceanic and Atmospheric Administration’s Drought Task Force, told CNN in March.
CNN’s Rachel Ramirez contributed to this report.