OVERTON, NV - MARCH 30: Artifacts that people have found are left on a foundation in Mormon pioneer town Saint Thomas, flooded 70 years ago by the rising waters of the Colorado River when it was dammed to create Lake Mead, is exposed as a continuing drought keeps the reservoir near historic low levels March 30, 2007 at Lake Mead National Recreation Area near Overton, Nevada. St. Thomas was established in 1865 at the confluence of the Muddy and Virgin Rivers by Mormons dispatched to southern Nevada to plant cotton and expand the reach of their church toward the West Coast. The town had grown to a population of 500 by the time it was inundated in 1938. The underwater concrete foundations were first seen by fishermen in 2003. Today tamarisk bushes cover the landscape. The US Bureau of Reclamation is evaluating four proposals to manage the drought on the Colorado River which supplies water and power to millions of people in the western states. The bureau has warned that shortages are possible as early as 2010. (Photo by David McNew/Getty Images)
