Water Supply
Civilian contractors from Quinn Construction use excavators to install an alternative water supply at Ellsworth Air Force Base, S.D., Jan. 13, 2012. The project connects Ellsworth’s water system with that of the city of Box Elder, S.D., to ensure a constant and reliable water source is available to both communities. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)