The Hojack Swing Bridge grew out of Rochester's rapid late-19th-century expansion of rail, river, and canal infrastructure. An earlier bridge at the site was built in 1875 by the Rome, Watertown and Ogdensburg Railroad Company, and the name "Hojack" is commonly linked, though speculatively, to engineer Jack Welsh, who was said to call out "Whoa Jack!" when stopping his train. Built in 1905 using the substructure of the earlier Charlotte Bridge of 1875, the Hojack Swing Bridge served for more than 90 years on an RW&O line that at its peak ran from Buffalo to Niagara Falls and east through Rochester to Oswego; the last train crossed in 1978, operations ceased in 1995, and the bridge was removed in 2012/2013. It was an early through truss swing bridge that rotated on a vertical axis from a man-made island at Genesee River mile 0.9 to let ships pass. Its substructure included a center pier, timber fender system, and north and south timber starkwaters that deflected debris, ice, and water flow, while its center pivot bearing, balance wheels, track, and rack were located on the center pier below the truss. The deck combined timber and steel components, carried two railroad tracks separated by a two-foot steel grate, and was supported by steel stringer beams forming a symmetrical latticed truss with portal struts and bracing. The bridge's swing movement was controlled from a small control house suspended high on the truss, where crews of one or two men operated the machinery and maintained first a coal-fired steam engine and later a diesel-powered engine. The bridge was built by the King Bridge Company, founded by Zenas King, a Vermont-born tradesman who moved to Cleveland, developed iron bridge manufacturing, received patents in 1861 for an iron bowstring truss and in 1864 for a swing or pivot bridge design, promoted iron over wood, organized the King Iron Bridge and Manufacturing Company in 1871, and left the firm in 1887 to his sons James and Harry; after 64 years in business, the company closed in 1922 following James's death.