The Y-bridge in Zanesville is named because of its distinctive shape as it crosses the confluence of the Licking and Muskingum Rivers. It is the only bridge in America on which it is possible to cross but stay on the same side of the river. First constructed in 1814, the bridge underwent several re-constructions after serious flooding. The current and fifth version of the Y-bridge opened in 1984. Today, a series of dams and locks, like this one, were funded in the mid-1800s and regulate the flow of the two rivers. The eleven locks on the Muskingum River made steamboat travel possible and spurred the development of industry in Zanesville.