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
84102
Building Number
Grade
II
Status
Designated
Date of Designation
28/02/2005
Date of Amendment
28/02/2005
Name of Property
Aqueduct SW of Church of St Cynllo
Address
Location
Unitary Authority
Powys
Community
Nantmel
Town
Locality
Nantmel
Easting
303356
Northing
266303
Street Side
Location
In a field SW of the church and above Ashbrook, spanning a steep-sided dingle.
Description
Broad Class
Period
History
Part of the Birmingham Corporation scheme to supply water to the city from reservoirs in the Elan Valley. The project began in 1892 with the construction of the reservoirs and opened in 1904. Chief engineer was James Mansergh, joined and later succeeded as project engineers by his sons Ernest Lawson Mansergh and Walter Leahy Mansergh. The water was conveyed principally by means of a subterranean aqueduct, but where the ground level fell below the hydraulic gradient one of the solutions (as used here) was to build an aqueduct above ground.
Exterior
A single-span aqueduct crossing a small stream. Of coursed, rock-faced stone and freestone dressings. A small round opening has a rusticated surround. There are 2 rock-faced buttresses on each side, the outer of which are almost buried by the steep bank. Above the buttresses the parapet has panelled freestone piers and a freestone coping. On the outer sides are iron railings and gates giving access to the deck, where the conduit is buried beneath gravel.
Interior
Reason for designation
Listed for its special architectural and historic interest as an integral component of one of the foremost civil-engineering projects of the early C20 in Wales.
Cadw : Full Report for Listed Buildings [ Records 1 of 1 ]
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