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Canal Bridge over Monmouthshire and Brecon Canal S of Ty Sign

A Grade II Listed Building in Risca, Caerphilly

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Coordinates

Latitude: 51.6043 / 51°36'15"N

Longitude: -3.0771 / 3°4'37"W

OS Eastings: 325498

OS Northings: 190043

OS Grid: ST254900

Mapcode National: GBR J2.B2PN

Mapcode Global: VH7B4.MY31

Entry Name: Canal Bridge over Monmouthshire and Brecon Canal S of Ty Sign

Listing Date: 22 October 1999

Last Amended: 22 October 1999

Grade: II

Source: Cadw

Source ID: 22512

Building Class: Transport

Location: Towards the E community boundary , the E area of Pontymister, between Herbert Avenue to S and Manor Way to N, S of Ty Sign.

County: Caerphilly

Community: Risca East (Dwyrain Rhisga)

Community: Risca

Locality: Pontymister

Built-Up Area: Risca

Traditional County: Monmouthshire

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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

Asymmetrical hump-backed bridge of rubble sandstone. Single elliptical arch has dressed stone voussoirs and low parapet with flat coping. Abutments are splayed outwards and end in square piers. Former towpath passed under bridge to S where there is a stone kerb. Cobbled deck. Concrete repairs to coping.

Reasons for Listing

Listed as a late C18 canal bridge retaining its character.

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