This is the important northern entrance into the river cut gully or gap between highlands, and was an important barge loading transshipment point on the newly extended upper Lehigh Canal fed initially by a shortline railroad from the Mountain Top yard dating from the 1837 enabling legislation set up to join the Lehigh and Susquehanna Valleys via Mountain Top and the Ashley Planes incline railway.
This is the crucial northern gateway into the river-cut ravine or chasm between elevated terrains, and it was a significant barge loading transshipment location on the newly expanded upper Lehigh Canal, initially fed by a shortline railroad from the Mountain Top yard established in 1837 to connect the Lehigh and Susquehanna Valleys via Mountain Top and the Ashley Planes incline railway.