Fluctuating river levels made riverboat trade unreliable, and area merchants began campaigning for railroad access in the late 1840s. The first rail line reached Jonesville in 1852. A railroad bridge over the Tennessee River was completed in 1854, connecting the city with Chattanooga, Tennessee. In recognition of this accomplishment, the name of the city was changed to "Bridgeport." Construction of a second rail line connecting Bridgeport with Jasper, Tennessee, to the north, began in 1860, but was not completed until after the Civil War.