Brynderwen Bridge and Bridge 147 over the Montgomeryshire Canal

Brynderwen Bridge and Bridge 147 over the Montgomeryshire Canal are a pair of connected structures designed to work together. Brynderwen Bridge is a single-span cast iron bridge featuring large stone buttresses on either side. The deck is held up by five latticed cast iron ribs, which are connected by lateral iron tie bars. The inner three ribs have arches made of lattice work in a criss-cross pattern, while the outer two ribs display lettering that reads ‘THIS SECOND IRON BRIDGE CONSTRUCTED IN THE COUNTY OF MONTGOMERY’. The abutments are made of rough, dressed grey stone and are slightly splayed, ending in piers topped with squared sandstone blocks and pyramidal copings. The cast iron decking girders are adorned with moulded panels on the outside and support iron railings that do not have a parapet. The railings rise from a moulded sandstone sill above the buttresses and are held in place by the sandstone piers. There are twice as many rails in the lower tier compared to the upper tier, and those that do not reach the upper tier end in spikes just above the mid rail. The upper rails are cusped just below the handrail. A cast iron plate attached to the railings warns against carrying heavy weights over the bridge and indicates ‘County of Montgomery’.

The bridge over the canal is a flat iron girder bridge resting on plain brick abutments, which extend as buttresses with sandstone copings. A cast iron plate on the girders reads BRYMBO 1853. The towpath is located on the east side and is separated from the canal by a red brick wall, likely built later, which provides additional support for the bridge. The girders also support cast iron railings that are identical to those on the river bridge and feature splayed ends.