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Latitude: 52.7691 / 52°46'8"N
Longitude: -3.107 / 3°6'25"W
OS Eastings: 325406
OS Northings: 319635
OS Grid: SJ254196
Mapcode National: GBR 71.YMR5
Mapcode Global: WH794.7NQG
Entry Name: Aqueduct carrying Montgomeryshire Canal over River Vyrnwy
Listing Date: 5 April 1993
Last Amended: 5 April 1993
Source ID: 14206
Building Class: Water Supply and Drainage
Location: Aqueduct parallel to B4398 road bridge over the River Vyrnwy; links the embanked canal from the north to the higher south side of the river at Newbridge.
Community: Carreghofa (Carreghwfa)
Locality: Lies partly in Llandysilio Community Area
Traditional County: Montgomeryshire
Designed by John Dadford, canal engineer of Cardiff, between 1794-6 and built by J Simpson and W Haseldine of Shrewsbury; immediate collapse of one arch was followed by a series of repairs completed by George Buck, engineer, from c1820. Handrail added 1828. Further major repairs in 1891 and 1971.
Long five-arch masonry structure of squared blocks with capping bands, rusticated segmental archrings with keystones and rusticated soffits. V-shaped stepped cutwaters with almond profile and domed cappings. Lines of oval brace-plates to tie-rods through haunches of arches. Centre arch and outer north arch have cradles of fish-bellied cast iron girders with tie-rods though haunches and exposed rods under soffits. Outer masonry ends are checked forward with curving abutments descending to end at square piers about river banks.
Three tapering stone piers with cappings on towpath side of aqueduct with ironwork handrail set in stone seatings. Large masonry edges to narrow length of canal contained by puddled clay etc.
Graded II* as the finest individual structure on the Montgomeryshire Canal. Historically interesting as an example from the last generation of clay-lined aqueducts.
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