At about 4 p.m. Monday, flash flooding along Rock Creek spilled over the banks and damaged road shoulders along 1,500 linear feet of the entrance road, park officials said.
Underground electric and phone lines were exposed along most of the road where the shoulder area was washed out up to 6 feet deep. All electric power and water service to the campground and picnic area has been shut off, officials said.
Park maintenance crews cleared rocks and debris from the roadway and blocked off washed-out road areas to allow one-lane traffic to escort campers from the campground Tuesday morning.
The campground, picnic area and all roadways will remain closed until power and water services can be restored and the repairs are complete. Park crews are further assessing the condition of the road and will begin making repairs immediately.
Trails remain open, but there is no trailhead access. Hikers should use caution throughout the area.
Crews are assessing the area for any damage to trails and foot logs. Roads are closed to all pedestrian traffic in the area throughout the closure.