Lake Mead, Colorado River, July 2010. Photo from Creative Commons by Lauri Vain/flickrhttps://www.nytimes.com/2010/09/28/us/28mead.html
Felicity Barringer, Sept. 27, 2010: "...For the first time, federal estimates issued in August indicate that Lake Mead, the heart of the lower Colorado basin's water system -- irrigating lettuce, onions and wheat in reclaimed corners of the Sonoran Desert, and lawns and golf courses from Las Vegas to Los Angeles -- could drop below a crucial demarcation line of 1,075 feet...."
US Bureau of Reclamation Lower Colorado Region
PDF: Draft 2011 Annual Operating Plan
also see: Water Scarcity: Lake Mead on Colorado River at 54-Year Low (via @NASA_EO @circleofblue)
Lake Mead, Sept. 7, 2010. Photo form Creative Commons by damndirty/flickr