Ancient Monuments

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Penclawdd Sea Dock and Canal

A Scheduled Monument in Llanrhidian Higher (Llanrhidian Uchaf), Swansea (Abertawe)

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Latitude: 51.6446 / 51°38'40"N

Longitude: -4.0937 / 4°5'37"W

OS Eastings: 255230

OS Northings: 196052

OS Grid: SS552960

Mapcode National: GBR GV.C89S

Mapcode Global: VH4K1.0X5M

Entry Name: Penclawdd Sea Dock and Canal

Scheduled Date: 8 November 1978

Source: Cadw

Source ID: 3629

Cadw Legacy ID: GM398

Schedule Class: Maritime

Category: Dockyard

Period: Post Medieval/Modern

County: Swansea (Abertawe)

Community: Llanrhidian Higher (Llanrhidian Uchaf)

Traditional County: Glamorgan


The monument consists of the remains of a tidal dock and canal dating to c. 1810. The dock served as a place for repairing boats which travelled along the Penclawdd canal. The canal was intended to bring coal from inland down to Penclawdd for export, however this operation ceased not long after it opened. The dock survives as a series of earthworks which still hold water. The jetty, which once would have had facing stones on the exterior, now consists of a rubble build, and is c. 120m in length and 1.5m in height. It is now grass covered and has at its seaward end the foundations of a rectangular building. The breakwater lies to the east and consists of a low bank enclosing a rectangular area which would form a water catchment for boats. The linear depression which marks the remains of the canal lies to the south and shows that the canal ran further west to the Penclawdd copperworks.

The monument is of national importance for its potential to enhance our knowledge of industrial or modern maritime economy and transport. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. A dockyard may be part of a larger cluster of monuments and their importance can further enhanced by their group value.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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