The road over Sylvan Pass on the east side of Yellowstone National Park was temporarily closed Friday afternoon as crews worked to remove unexploded ordinance left behind as a result of avalanche mitigation work done, presumably during the previous winter.
According to a statement from the park’s public affairs office, the ordinance was found Friday afternoon near the roadway over Sylvan Pass, and the closure was expected to last a few hours while a team from Malmstrom Air Force Base near Great Falls, Mont. responds and destroys the shell.