Brynderwen Bridge and Bridge 147 over the Montgomeryshire Canal

The two bridges form a linked sequence over river and canal and appear to have been designed together. Brynderwen Bridge is a single span cast iron bridge with massive stone buttresses to each side. The deck is supported by 5 latticed cast-iron ribs, linked together by lateral iron tie bars. The arches of the inner 3 ribs are formed of lattice work in a criss-cross design, but the arches of the outer 2 ribs are formed by lettering which reads ‘THIS SECOND IRON BRIDGE CONSTRUCTED IN THE COUNTY OF MONTGOMERY’. The abutments are of roughed, dressed grey stone and are slightly splayed. They terminate as piers surmounted by squared sandstone blocks with pyramidal copings. The cast iron decking girders are decorated with moulded panels on the exterior and support iron railings without a parapet. Above the buttresses, the railings rise from a moulded sandstone sill and are contained by the sandstone piers. There are twice as many rails in the lower tier as the upper tier, and those that do not continue to the upper tier terminate as spikes just above the mid rail. The upper rails are cusped just below the hand rail. A cast iron plate attached to the railings reads ‘County of Montgomery’ and then provides warnings against carrying heavy weights over the bridge.

Over the canal is a flat iron girder bridge carried on plain brick abutments which return as buttresses with sandstone copings. A cast iron plate attached to the face of the girders reads BRYMBO 1853. The towpath is located on the E side and is separated from the canal by a red brick wall, probably of later construction and providing additional support for the bridge. The girders support cast iron railings, which are identical to those of the river bridge and have splayed ends.