First Lt. Brian Jutila, of U.S. Army Reserve's 486th Engineer Company of Southfield, Mich., buffalo corral worksite officer-in-charge, identifies one of the freeze-proof hydrants emplaced by engineers at the buffalo corral complex at Custer State Park during the South Dakota National Guard's Golden Coyote training exercise, June 17, 2012. The engineers completed a variety of projects to improve the efficiency of the site in just four days, while simultaneously participating in combat training lanes. The 28th annual Golden Coyote training exercise benefits the Black Hills by providing manpower and equipment for infrastructure projects for the National Forest and Custer State Park as well as training opportunities for military personnel in support of overseas contingency operations and homeland defense.