Penawr Bridge (Canal Bridge No.151)

Hump-back bridge of rubble sandstone. Segmental arch has thin voussoirs and low parapet with flat coping. The abutments curve outwards on both sides and the parapet has square end piers. On the E side is a cast iron plaque with the bridge number cast in relief in keystone position. The towpath passes under bridge on N side and has a stone kerb; on S side is a stringcourse roughly at water level.

The bridge carries a field track. The painted number 13 on the upstream keystone is the clearest survivor of the original numbering sequence which started from Brecon. 2 posts of former lozenge-shaped cast iron weight restriction signs.