The compact paved—or, if you prefer, lubricated—the way for the creation of the nation’s two largest reservoirs, Lake Powell and Lake Mead. Lake Mead sits behind Hoover Dam, completed in 1935, and was designed to serve the lower basin. Today, it supplies practically all the water that’s used in Las Vegas, and much of what’s drunk in cities such as San Diego and Tucson. It also provides—or used to provide, when it was fuller—water for irrigating more than three million acres of corn, cotton, and alfalfa.
Lake Powell, which serves the upper basin, doesn’t supply water to much of anyone. Water released from Powell flows into Marble Canyon, then through the Grand Canyon and into Mead. In this sense, Powell is a reservoir for a reservoir. Whether this arrangement ever made sense is unclear. In periods of high flow, Mead should have plenty of water. And in periods of low flow what’s the point of impounding the Colorado on its way to Lake Mead?
Elizabeth Kolbert
You can search and search and search, Mathew Gross, a Utah-based author and political consultant, has written. But, if you want to know why Lake Powell was created,you’ll never find a satisfactory answer.
I have never been particularly keen on visiting the continental United States – in recent years because of the increased digital surveillance of incoming visitors and the American gun culture – but after reading this article I would gladly make an exception to travel inside Glen Canyon in its strange, transitory state. Neither the arid canyon from a century ago, nor the vast water reservoir from past decades, it feels as if this place is transforming under our eyes, each scenery different from day to day, from year to year, never to return to the same state.