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Cof Cymru: National Historic Assets of Wales · Wales

Locomotive Shed

Llanddeiniolen, Gwynedd, Wales

The record

Designation
Listed building, Grade II
Broad class
Transport
Date of designation
4 November 1999
Locality
Gilfach Ddu
Town
Caernarfon
Community
Llanddeiniolen
Unitary authority
Gwynedd
Country
Wales
Coordinates
53.12179, -4.11409
Cadw reference
22657

Slide toward Today to fade the historical sheet and see the modern map underneath.

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

Situated to the north-east of the former Dinorwic Slate Quarry Workshops, the locomotive shed is located immediately north of the entrance to the Glan-y-Bala tunnel which once provided a connection to the south-eastern area of the quarry.

Built in the late C19 to serve as a locomotive shed on the Padarn 4ft (1.22m) gauge railway, which opened in 1843 to transport slate from the Dinorwic Quarry to Port Dinorwic. This particular shed appears to have housed the locomotive which passed through the Glan-y-Bala tunnel to connect with the south-eastern area of the quarry until tipping allowed the line to be relaid around the bluff. The lean-to on the north gable end appears to be a later addition.

Long rectangular-plan high single-storey structure with lean-to addition on north gable end. Main building of snecked rock-faced rubblestone with slate-stone quoins; dressed slate-stone slabs to lean-to; slate roof with long gabled ventilated louvre to ridge of main shed; banded slates on lean-to. Long west wall of shed has 3 tall round-headed decorated cast-iron windows (of very similar pattern to those in Quarry Workshops) with tightly jointed pointed slate voussoirs and slate cills; integral slate-stone stack with moulded capping to north. South gable end has pointed doorway for locomotive with dressed slate voussoirs; lean-to on north has window to west and doorway on north.

Interior not accessible at time of Survey.

Included as a well-preserved example of a late C19 4ft (1.22m) gauge locomotive shed of some architectural distinction on the old Padarn Railway, having strong group value with related quarry structures at the former Dinorwic Slate Quarry.

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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