On June 10, 1838, a boat laden with forty tons of merchandise was carried through the Lehigh navigation from Mauch Chunk to White Haven in fourteen hours and drawn by one set of horses, and the locks on that navigation were capable of passing boats of one hundred fifty tons burden. The ruins of Lock 22 illustrate original construction details and provide an opportunity to view the inside of a lock, including a stone and wood structure once filled and emptied with cool water. Water flowing from an arched-shaped conduit prevented boats from crashing against the lock doors as water gushed in from upstream, and the twenty-foot-high lock walls were built of stones fitted together without mortar. The canals, dams, and locks were built with simple tools, manpower, and mule power by workers, immigrants from Germany, Ireland, Wales, and Scotland, who slept on rough pine board bunks and spent up to eight months working in the water. After the flood of 1862, the uninhibited growth of nature transformed former canal stretches, including the area behind this lock at Mud Run, into a specialized wildlife and plant habitat.