When coal was discovered in Summit Hill in the late 1700s, a rush of development ensued in the Lehigh Valley. Josiah White and the Lehigh Coal and Navigation Company constructed a series of dams and canals in the early 1800s to move coal to the markets down south. The canal system was wiped out by flooding in the mid-1800s, and the railroads took their place serving a booming logging industry. Fire ripped through the area and wiped out the logging industry in the late 1800s. The area became a tourist attraction until fire again swept through the region in the early 1900s, after which the gorge was abandoned. The Commonwealth of Pennsylvania began reclaiming the land in the 1970s..Look for Caboose.