newlands reclamation act

The federal government finally entered the irrigation business in 1902, after it became clear that large infusions of public funds were needed to build projects big enough to be effective in the arid West. The eventual result was a dozen dams across Wyoming, but crop agriculture here remains scarce. 

In 1869 and 1871, John Wesley Powell led two expeditions from Wyoming Territory down the Green and Colorado rivers. These and other explorations brought him to a profound understanding of how the West’s aridity limits its economic prospects. He directed the U.S. Geological Survey from 1881-1894, and his ideas still affect land and water policy today.