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As Lake Mead’s Water Levels Drop a Long-Submerged Town Reappears

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Lake Mead National Recreation Area

Prolonged drought in the Southwest has caused a rapid drop in the water level of Lake Mead. That’s putting water supplies to some major cities in jeopardy. But it’s also exposed some of the area’s history and a long-submerged town. Arizona Public Radio’s Ryan Heinsius reports. 

Saint Thomas, Nevada was founded by Mormon settlers in the 1860s. But since the completion of the Hoover Dam in the 1930s, it’s been mostly underwater. The dam created Lake Mead, the country’s largest reservoir. With the lake’s level now near the lowest point in its history, several buildings and other remains of a once-bustling town are now completely exposed.

A National Park Service employee surveys the foundations at St. Thomas, Nev.
Credit Lake Mead National Recreation Area

The foundation and stairway of the St. Thomas School House. It's also pictured in the black and white photo.
Credit Lake Mead National Recreation Area

Christie Vanover is with Lake Mead National Recreation Area.

“There’s actually still the stairs that walked up into the schoolhouse. It’s just so rare that you’re able to find a city that was once under water.” 

A salvage crew rafts through the town of St. Thomas near the ruins of a building as Lake Mead begins to submerge it in June 1938.
Credit Lake Mead National Recreation Area

Lake Mead’s water level has dropped about 130 feet in the last 15 years. Cities that depend on Lake Mead for water include Los Angeles, Las Vegas and Phoenix. 

The waters of Lake Mead began to take over the city of St. Thomas, Nevada, in 1937 and 1938.
Credit Lake Mead National Recreation Area

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Ryan Heinsius joined the KNAU newsroom as executive producer in 2013 and was named news director and managing editor in 2024. As a reporter, he has covered a broad range of stories from local, state and tribal politics to education, economy, energy and public lands issues, and frequently interviews internationally known and regional musicians. Ryan is an Edward R. Murrow Award winner and a Public Media Journalists Association Award winner, and a frequent contributor to NPR's Morning Edition, All Things Considered and national newscast.