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Cof Cymru: National Historic Assets of Wales · Wales

New Dock (quay)

Llandygai, Gwynedd, Wales

The record

Designation
Listed building, Grade II*
Broad class
Miscellaneous
Date of designation
24 May 2000
Locality
Porth Penrhyn
Community
Llandygai
Unitary authority
Gwynedd
Country
Wales
Coordinates
53.23421, -4.11212
Cadw reference
23439

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David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1896 "Sheet 7. Ordnance Survey of England and Wales." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

Built on Bangor flats at the mouth of the Afon Cegain which flows into the Menai Strait at this point.

Although shipments of slate were being sent to Ireland from Abercegin (the original name for the area) as early as 1713, it was not until 1790 that Benjamin Wyatt, agent to the Penrhyn Estate since 1786, supervised the building of a stone wharf here, activity on which rapidly increased after the opening of the horse-drawn tramway from the Penrhyn Slate Quarry in 1801. The wharf was further extended in 1829-30 with a final extension in 1855 when the breakwater was added on the eastern side, forming an inner basin.

Wharf constructed of finely jointed large Anglesey limestone blocks with iron cramps, the inner basin curved to its southern end and with a breakwater at the north-eastern end curving inwards to protect the entrance to the harbour. There are 2 C19 cranes on the dock, one at the southern end of the inner basin, the other on the western side of the main quay. There are also a large number of bollards, both of stone (the earlier type) and cast-iron, to secure vessels along the western side of the main quay and around the inner basin.

Listed at II* as a remarkably well-preserved late C18 dock associated with the rapid expansion of the slate industry and for its importance as the main centre for the export of its products until well into the C20.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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