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
82081
Building Number
Grade
II
Status
Designated
Date of Designation
26/11/2003
Date of Amendment
26/11/2003
Name of Property
Cwm Clydach Dam (partly in Dyffryn Clydach community)
Address
Location
Unitary Authority
Neath Port Talbot
Community
Blaenhonddan
Town
Neath
Locality
Neath Abbey
Easting
273899
Northing
198767
Street Side
Location
Spanning Cwm Clydach approximately 950m N of Neath Abbey railway viaduct and some 120m NE of Glynfelin Farm.
Description
Broad Class
Industrial
Period
History
Dam, built 1840 to renew earlier structure. It was used to regulate the flow of water to Neath Abbey Ironworks some 1 km downstream. Water power was widely used in the works even after the advent of steam power. In 1840 the Neath Abbey Iron Company had two rolling mills and a boring mill powered by waterwheels. The Neath Abbey Ironworks were developed by two Quaker families, the Foxes of Falmouth from 1792 and Joseph Tregelles Price from 1817. Under Price the works became famous for high-quality engineering products including locomotives, stationary engines and steamships. The works closed in 1886.
Exterior
Dam, high wall of Pennant sandstone with battered lower face. W end has buttresses between twin outlets from vertical cast-iron tubes, one with cast-iron paddle gearing on N side. Four overflow outlets above, all with cast-iron stop-plank supports. Dam carries minor roadway with, from E, rubble stone walls, C20 railings, C20 rubble stone walls and then concreted walls on W end. The reservoir is heavily silted almost to road level.
Interior
Reason for designation
Included as a well-built stone dam of the earlier C19 and of special historical interest as part of the former Neath Abbey Ironworks. Scheduled Ancient Monument GM395.
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