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
23688
Building Number
Grade
II
Status
Designated
Date of Designation
21/07/2000
Date of Amendment
Name of Property
North-eastern aerial ropeway revetment, incline and associated buildings
Address
Location
Unitary Authority
Gwynedd
Community
Llanllyfni
Town
Locality
Nantlle
Easting
250117
Northing
353236
Street Side
Location
Located above the east side of the North Dorothea Slate Quarry between Pen-y-Bryn to the north-east and the ruins of the former slate mill to the south-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 until its closure in 1970 the quarry was owned by the Williams family. The reveted structure and incline are shown on an Ordnance Survey map of 1889. 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 of sawn slate blocks, aligned roughly east-west. The sides are strongly battered with offsets on the north face; remains of slate-built structures on top at south end. Projecting from the south end, in a north-westerly direction, is a slate-built inclined plane with the remains of a winding house at its head.
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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