Ashford Tunnel S Portal (Monmouthshire and Brecon Canal)

Cadw's description

Location

Adjacent to the B4558, NE of Ashford Cottage.

History

Tunnel is 375yds (343m) long and is the only tunnel on the canal. The Brecknock and Abergavenny Canal was promoted in 1792 to connect the upper Usk valley with the Monmouthshire Canal at Pontymoile and from there to the sea at Newport. First section, between Gilwern and Talybont, was cut between 1797 and 1799, with upper section between Talybont and Brecon opened in 1800, both sections engineered by Thomas Dadford. Lower section between Gilwern and Pontymoile completed 1812 and engineered by William Crosley. Linked to tramroads, the canal was an important artery for trade in iron, lime and coal. In 1865 the Brecknock and Abergavenny and the Monmouthshire Canals merged to become the Monmouthshire and Brecon Canal, which was later incorporated into the Great Western Railway. Last toll was taken in 1933. Restoration of canal began 1964. Tunnel was re-opened after repair 1985.

Exterior

Small round arched portal of rubble sandstone with deep voussoirs and keystone, end piers, flat coping, no parapet. The canal narrows to single barge width at entrance. No towpath in tunnel, the boats were shafted through; path continues along top.

Reason for designation

Listed for the special interest of the Ashford Tunnel as one of the original engineered structures on the Brecknock and Abergavenny Canal.

Group value with Ashford and Ashford Cottage.