The Ross and Monmouth Railway line opened in 1873 terminating at Monmouth Mayhill railway station. A further single line and three-span bridge of almost 300 feet was constructed to join the two Monmouth railway stations, opening on 1 May 1874. It consists of 3 spans of steel-lattice girders on paired steel tubular piers with squared rubble abutments. The main span is 46 metres long and the shorter spans are 18 metres each. It was built by Edward Finch of Chepstow.

The line between Monmouth Troy and Mayhill was closed on 6 January 1964. The R&MR Duke of Beaufort Bridge remains in use as a footpath. A Sustrans project aims to restore and redeck the bridge as part of improving local cycle connectivity.