![]() ![]() ![]() In 1730, the Wright's Ferry was established to cross the river. This stifled trade across the lower Susquehanna in colonial Pennsylvania and Maryland. The Susquehanna is very wide in this area, as it nears its mouth on the Chesapeake Bay. The varied terrain created many nurturing biological habitats, but human passage across the valley and river was extremely difficult. A wide, flat valley formed the frequently wide river was a substantial barrier to crossing, both for Native Americans and for colonists. Thick forests surrounded a mixture of small waterfalls, rapids, and marshes. The Susquehanna River flooded annually in the spring, and there were more damaging floods approximately once per decade. The valley was flooded primarily during the early 1900s by the construction of the Holtwood, Conowingo, and Safe Harbor dams from 1910 to 1931.īefore the twentieth century, the Conejohela Valley was a marshy floodplain, with extensive wetlands. The Conejohela Flats are a group of islands in the flooded Conejohela Valley, a large floodplain along the southernmost 30 miles (50 km) of the Susquehanna River in Pennsylvania and Maryland in the United States. ![]()
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