Full Report for Listed Buildings
The list description is not intended to be a complete inventory of what is listed: it is principally intended to aid identification. By law, the definition of a listed building includes the entire building (i) and any structure or object that is fixed to the said building and ancillary to it and (ii) any other structure or object that forms part of the land and has done so since before 1 July 1948, and was within the curtilage of the building, and ancillary to it, on the date on which said building was first included in the list, or on 1 January 1969, whichever was later.
Summary Description
Reference Number
23687
Building Number
Grade
II
Status
Designated
Date of Designation
21/07/2000
Date of Amendment
21/07/2000
Name of Property
South-western aerial ropeway revetment, incline and associated buildings
Address
Location
Unitary Authority
Gwynedd
Community
Llanllyfni
Town
Locality
Nantlle
Easting
249826
Northing
353107
Street Side
Location
Located above the south side of the North Dorothea Slate Quarry, between the Cornish beam engine house to the west and the ruins of the former slate mill to the east.
Description
Broad Class
Industrial
Period
History
The Dorothea Quarry in the centre of the Nantlle vale was opened in 1829 by William Turner and John Morgan. From 1853 it was owned by the Williams family until its closure in 1970. The existing incline is shown on an Ordnance Survey map of 1889, although at that date the site of the ropeway structure was occupied by a further incline. The purpose of the revetment was to house engines which drove chain or cable inclines at an angle of about 45 degrees, enabling quarry wagons to be pulled up and let down using further cables.
Exterior
Large ziggurat-like structure built of sawn slate blocks, aligned roughly north-south. The sides are strongly battered with distinctive offsets; remains of slate-built structures on top. Projecting from the east end, in a north-easterly direction, is a slate-built inclined plane.
Interior
Reason for designation
Included as one of a pair of large and unique aerial ropeway revetments, impressive for the scale of their engineering and having strong group value with the Cornish beam engine house at this important C19 slate quarry.
Scheduled Ancient Monument (No.199).
Cadw : Full Report for Listed Buildings [ Records 1 of 1 ]
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