Anne MacKinnon

By treaty, Native Americans in 1868 were reserved land along—and water from—Wyoming’s Wind River. But it would take a century and a half for courts to work out what water was whose—and to begin to define what tribal owners of the water could and couldn’t use their water for. 

Elwood Mead was only 30 in 1888 when Territorial Gov. Thomas Moonlight hired him to bring order to Wyoming’s water law. As territorial engineer Mead did just that, and his ideas were written into the state constitution adopted in 1890. Mead spent only 11 years in Wyoming, but all his life carried with him what he learned in the state.