In the valley below, the first paper mill in Ohio and the Northwest Territory was established in 1807 by John Coulter of Virginia, Jacob Bowman, and John Beaver of Pennsylvania on the east bank of Little Beaver Creek in St. Clair Township. Called The Ohio Paper Mill, the firm produced handmade rag paper in a stone building until the early 1830's, and its watermark was a spread eagle, the word Ohio, and the initials of the proprietors, C B & B. Near this place in Liverpool Township, where the old road from New Lisbon to Georgetown, Pennsylvania, crossed Little Beaver Creek, stood the earliest known covered bridge in Ohio. Built in 1809 by John Bever and Thomas Moore as a toll bridge authorized by an act of Legislature, it was donated to Columbiana County about 1832, and the abutment still standing on the west bank of the creek is the only physical evidence remaining of the structure.