The reservoir created by Hoover Dam, an engineering marvel that symbolized 20th Century American ingenuity, has sunk to its lowest level ever, underscoring the gravity of the extreme drought across the U.S. West. #HooverDam #drought #environment #News #Reuters Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en