ニューヨーク・タイムズのインスタグラム(nytimes) - 8月2日 10時41分

Hoover Dam helped transform the American West, harnessing the force of the Colorado River — along with millions of cubic feet of concrete and tens of millions of pounds of steel — to power millions of homes and businesses. It was one of the great engineering feats of the 20th century. Now it’s the focus of a 21st-century challenge: turning the dam into a vast reservoir of excess electricity, fed by the solar farms and wind turbines that represent the power sources of the future. The Los Angeles Department of Water and Power wants to equip the dam with a $3 billion pipeline and a pump station powered by solar and wind energy. The net result would be a kind of energy storage — performing much the same function as the giant lithium-ion batteries being developed to absorb and release power. The dam, with its towering 726-foot concrete wall and its 17 power generators that came online in 1936, would not be touched. Instead, engineers propose building a pump station about 20 miles downstream from the main reservoir, Lake Mead. A pipeline would run partly or fully underground, depending on the location ultimately approved. But because #HooverDam sits on federal land and operates under the Bureau of Reclamation, part of the Interior Department, the bureau must back the project before it can proceed. @joshhaner and @sjwilliams made this video. Visit the link in our profile to read more.

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