Wenallt Lower Bridge (Canal Bridge No.140)

Wenallt Lower Bridge, also known as Canal Bridge No. 140, is a hump-back bridge constructed of rubble sandstone. It features a segmental arch made with thin voussoirs and has a low parapet with flat coping. The abutments curve outwards on both sides, and the parapet is finished with square end piers. On the eastern side, there is a cast iron plaque displaying the bridge number, which is positioned in relief at the keystone. The towpath runs beneath the bridge on the northern side and includes a stone kerb, while on the southern side, there is a stringcourse that is roughly at water level. The bridge has a grass farm track surface and displays a lozenge-shaped cast iron weight restriction sign.