The area above the water gap has been a Wild and Scenic River since 1978.
A water gap is an opening which flowing water has carved through a mountain range.
A water gap is a geological feature where a river cuts through a mountain ridge.
There are no water gaps carrying rivers through the ridge.
A water gap is usually an indication of a river that is older than the current topography.
Four of Pennsylvania's major rivers cut through Blue Mountain in water gaps.
Due to the lack of a water gap through the mountains, the mountain passes are relatively high.
A water gap is a similar feature, but one in which a waterway still flows.
A spokesman for the water gap did not immediately return several phone calls on Saturday.
As the ridge continued to fold upward, erosion cut through and the water gap was formed.