CPAT Regional Sites & Monuments Record

PRN 36450 - Montgomeryshire Canal, Welshpool Lledan Brook Weir
Listed Building 62/N/165 (II )

NGR :- SJ22700745 (SJ20NW)
Unitary authority :- Powys
Community :- Welshpool
Prefered site type :- 19th century - Weir (Building - )

Listed building

The following is CPAT's transcription of the current Cadw Listing description - IT IS NOT DEFINATIVE

Carries the Montgomeryshire Canal over the Lledan Brook.

History: The Montgomeryshire Canal was constructed between 1794 and 1797, but the original aqueduct at this site was replaced in 1836 by J.A.S. Sword, who was the canal company's engineer from 1833. Its design was modelled in the earlier aqueduct by George Buck at Brithdir, which had been built in 1819.

Description: Base and sides of aqueduct formed from a series of bolted cast-iron plates, flanked by paths carried on brick arches. These have conventional segmental arches with rusticated stone voussoirs, with an inscribed tablet above the western arch recording 'J. Sword, Engineer, 1836'. The tow-path side is surmounted by cast-iron railings with trellised decoration, between panelled ashlar terminal piers with domed caps.

On the western side of the aqueduct, brick retaining walls to either bank of the brook flank the pool below a circular weir. This was probably rebuilt with the aqueduct in 1836, and existed to divert water to Domen cornmill.

The aqueduct is a fine example of the engineering associated with the Montgomeryshire Canal, of considerable interest for its engineering as well for its architectural character. Together with the weir, it forms an important component in a group of structures at the major canal wharf at Welshpool.

CPAT visit form , 2003 , ,
Jones, N W, Silvester, R J & Britnell, W J , 2003 , Montgomery Canal Conservation Management Strategy. Landscape Archaeology Assessment , CPAT Report 550 .
Additional sources:-
Stephen Hughes, The Archaeology of the Montgomeryshire Canal, 1988, pp.25, 28-9.

Assessment CPAT / 2003(31/08/03) -
Desktop study CPAT / 2003(31/08/03) -
HLC CPAT / 2003(31/08/03) -

record created 19/09/96 BC96 - copyright CPAT , last updated 10/05/04
The above data are supplied by CPAT in partnership with its Local Authorities and the partners of END, CPAT SMR partnership, 2004 (and in part Crown, 2004 - as indicated)

CM - 10/05/04 ( 12:05:45 ) - HTML file produced from CPAT's Regional SMR
Clwyd Powys Archaeological Trust, Curatorial Section, 7a Church Street, Welshpool, Powys SY21 7DL.
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