History

In 1790s a consortium of coal owners and industrialists sought Parliamentary approval to build canals to
link the industrial areas of the N valleys with Newport on the Usk estuary, the canals in turn to link with a
system of feeder tramroads. Bill received assent in 1792 and the Monmouthshire Canal Navigation
Company was formed to build two canals; that in the Western Valley, also known as the Crumlin Arm and 11 miles long, was designed to join the Eastern Valley Canal just N of Newport, completed c 1797
engineer Thomas Dadford. Reservoirs to feed canal were constructed in mountain valleys. In 1865 the
Brecknock and Abergavenny and Monmouthshire Canals merged to become the Monmouthshire and Brecon Canal which was later incorporated into the Great Western Railway. Much of the Western Valley canal was filled in to provide a by-pass road but the section through Risca mostly survives, continuing on from the surviving Crosskeys section. The Sirhowy tramroad built at the expense of the Sirhowy and Tredegar ironmasters from their furnaces in the north valleys to Nine Mile Point, at the bottom of the Sirhowy Valley, N of Risca was completed 1805, linking with the Monmouthshire Railway and Canal Company tramroad via the Long Bridge, crossing the Ebbw Valley.

Exterior

Hump-backed bridge of rubble sandstone. Single elliptical arch has dressed stone voussoirs and low
parapet with flat coping. Abutments splayed outwards end in square piers. Former tow path passed
under bridge on S side. Tarmac deck. Repairs in concrete to coping and ends.

Reasons for Listing

Listed as a late C18 canal bridge retaining its character.

External Links

• Cadwr Listing

External links are from the relevant listing authority and, where applicable, Wikidata. Wikidata IDs may be related buildings as well as this specific building. If you want to add or update a link, you will need to do so by editing the Wikidata entry.

Recommended Books

• 
  Gloucestershire 2: The Vale and The Forest of Dean: Vale and Forest of Dean Pt. 2 (Pevsner Architectural Guides: Buildings of England)
• 
  Listed Buildings and Other Heritage Assets
• 
  Old House Care and Repair
• 
  Old House Handbook: A Practical Guide to Care and Repair
• 
  Department for Communities Listed Historic Buildings of Northern Ireland: Information Guide for the 2nd Survey of Historic Buildings
• 
  Yorkshire: York and the East Riding (Pevsner Architectural Guides: Buildings of England)