By the mid 1800s, the only bridge of any note across the Taff in central Merthyr was the Iron Bridge at the bottom of Castle Street, the only other bridge being Jackson’s Bridge further up the river. It soon became obvious that the Iron Bridge was not adequate for the amount of traffic needing to cross the river.
In June 1860, the Surveyor of the Local Board of Health submitted a plan for a new bridge to be situated downstream of the Iron Bridge to carry traffic from the town to Georgetown. His proposal stated:
“The proposed bridge to be erected….is the continuance of the line of Victoria Street and its terminus by Ynysgau Chapel, and crossing the river Taff on the skew at an angle of sixty-five degrees – thus forming a direct communication between Victoria Street and Penry Street, which will effect greater facility of traffic that the inconsistent turns at the present site”.
The proposed new bridge would cross the river in one single 80 foot span, and would be built of wrought iron plate girders six feet deep. It would be 24 feet wide, five foot of which would be set aside for a pedestrian footpath on the north side. The cost of the new bridge was estimated at £1,700, and would take about four months to complete.
The Board of Health decided to hold over the report for a month to allow them time to consider the proposals. Ten years later, the bridge still hadn’t been built.
It was in 1879 that it became obvious that the situation at the Iron Bridge was critical and that a new bridge was needed straight away. The Board finally dusted off the old plans, and the new bridge was begun. The work was entrusted to Messrs Patton and Co of Crumlin Viaduct Works, and the bridge was finally completed on 17 March 1880.
The bridge remained the primary road bridge in the centre of Merthyr until the 1960s, by which time everyone was becoming increasingly concerned by the way the bridge would move and spring alarmingly every time heavy vehicles passed over it. It was decided that a new bridge was required, and a new concrete bridge was built 50 yards upstream (the present bridge near the Fire Station).
The old bridge closed in November 1963 when the new bridge was opened, and the structure was dismantled in 1964.