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.

Reasons for Listing

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.

External Links

• Cadwr Listing
• Wikidata Q29506149

External links are from the relevant listing authority and, where applicable, Wikidata. Wikidata IDs may be related buildings as well as this specific building. If you want to add or update a link, you will need to do so by editing the Wikidata entry.

Recommended Books

• 
  Hertfordshire (Pevsner Architectural Guides: Buildings of England)
• 
  Bristol (Pevsner Architectural Guides: City Guides)
• 
  ENGLAND GUIDE TO POST WAR LISTED: A Guide to Post-war Listed Buildings
• 
  Setting up a Listed Building Heritage Partnership Agreement: Historic England Advice Note 5
• 
  Listed Buildings: The Law and Practice of History Buildings, Ancient Monuments and Conservation Areas
• 
  The Listed Buildings and Other Principal Structures at the Royal Gunpowder Mills Waltham Abbey