Lock Haven was laid out as a town in 1833, and it became the county seat in 1839, when Clinton County was created out of parts of Lycoming and Centre counties. Incorporated as a borough in 1840 and as a city in 1870, Lock Haven prospered in the 19th century largely because of timber and transportation. The forests of Clinton County and counties upriver held a huge supply of white pine and hemlock as well as oak, ash, maple, poplar, cherry, beech, and magnolia. The wood was used locally for such things as frame houses, shingles, canal boats, and wooden bridges, and whole logs were floated to Chesapeake Bay and on to Baltimore, to make spars for ships. Log driving and log rafting, competing forms of transporting logs to sawmills, began along the West Branch around 1800. By 1830, slightly before the founding of the town, the lumber industry was well established.