History in Structure

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Weir on E side of Tennant Canal at Red Jacket Pill

A Grade II Listed Building in Coedffranc (Coed-ffranc), Neath Port Talbot

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Latitude: 51.6363 / 51°38'10"N

Longitude: -3.8451 / 3°50'42"W

OS Eastings: 272404

OS Northings: 194667

OS Grid: SS724946

Mapcode National: GBR H1.81K4

Mapcode Global: VH4KC.94LF

Entry Name: Weir on E side of Tennant Canal at Red Jacket Pill

Listing Date: 29 March 2000

Last Amended: 29 March 2000

Grade: II

Source: Cadw

Source ID: 23077

Building Class: Transport

Location: At Red Jacket Pill on N side of a modern concrete weir and immediately S of SW corner of gas works.

County: Neath Port Talbot

Community: Coedffranc (Coed-ffranc)

Community: Coedffranc

Locality: Red Jacket Pill

Traditional County: Glamorgan

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The Tennant Canal was built 1820-4, engineered by William Kirkhouse. The head of the canal was at Aberdulais, where it joins the Neath Canal, and ended at Port Tennant on the E side of the River Tawe in Swansea. Traffic was carried on the canal until 1930s. The weir, constructed to carry off excess water and prevent the canal bursting its banks, is within a raised section of canal embanked across marshy ground.


The top of the weir is approximately 5m long and water is channelled from the canal through 6 shallow segmental-arched culverts below the towpath. The arches are of dressed sandstone with the core stonework of the culverts visible on the upper surface, but with a concrete coping added on the canal side. On E side is a short cascade of stepped stonework. Its flanking walls survive only in part, having been mainly washed away, and are of rubble stone with flat dressed copings.

Reasons for Listing

Listed for industrial archaeological interest as an original built component of the Tennant Canal and for group value with other structures associated with the canal.

Other nearby listed buildings

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