Neath and Tennant Canal - Demise

Demise

The canals faced competition from the Vale of Neath Railway after 1851, but remained profitable until the early 1880s, in the case of the Neath Canal, and the 1890s for the Tennant. An unusual aspect of the Tennant's success was that tolls were maintained, although tonnage dropped. Most canals at this time made significant cuts to tolls in an attempt to remain competitive with the railways. After 1883, the Neath Canal carried small amounts of silica and gunpowder, but traffic had virtually ceased by 1921. Navigation on the Neath Canal came to an end in 1934, and on the Tennant Canal soon afterwards. However, most of the infrastructure was maintained as the canals supplied water to local industries.

When the Glynneath bypass was built in the 1970s, the canal was culverted above Ysgwrfa lock, to allow the road to be straightened, and reduced in width beyond that, to allow the road to be widended. Above Pentremalwed lock, the road was built over the canal bed, and all traces have gone. This road was superseded by the A465(T) dual carriageway when it opened in 1996, and has become the B4242. The part which covered the final section of the canal is no longer a road, although the dual carriageway runs over the site of the Glynneath basin.

At Port Tennant, the course of the canal has been covered over by railways, roads and other facilities of the port, but continues to supply water to the Prince of Wales dock through a large culvert, which helps to maintain water levels in the docks. The Tennant canal is still owned by the Coombe-Tennant family.