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Slaidburn Bridge
River Hodder, Slaidburn, Lancashire, UK
Slaidburn Bridge
associated engineer
Not known
date  late 18th century
UK era  Georgian  |  category  Bridge  |  reference  SD713523
photo  ICE R&D Fund
One of several late 18th century, Grade II listed masonry road bridges in the Forest of Bowland. This one carries the B6478 (Chapel Street) over the River Hodder at Slaidburn.
We know there was an earlier bidge here, since "Slayburn" Bridge is recorded as being in decay in 1642. We also know that its late 18th century replacement has been widened at some point.
The side of the bridge facing downstream has single rings of voussoir stones (wedge-shaped stones forming the arches), flush with the spandrels (infill panels). This contrasts with the upstream face, which you can see in the picture. It has an extra course of radially laid stone work (a label mould) above its voussoirs. This is a later technique and indicates that the bridge was widened on this side, a deduction supported by the damp stains under the bridge, running up the centrelines of both arches.
The overall length of the bridge is 28.55m. The western-most of its two segmental circular arches spans 11.7m, partly over land. It rises 2.97m. The eastern-most span measures 14.1m and rises 3.25m.
The bridge has coursed ashlar (dressed) masonry wing walls, spandrels and parapets, and substantial pointed cutwaters on both faces. It also has rectangular pilasters the width of the river pier that continue up either side to the tops of the parapets. There is a pronounced stringcourse at the level of the roadway on both sides of the bridge.
Research: PD
"The Ancient Bridges of the North of England" by E. Jervoise, EP Publishing Ltd, 1973

Slaidburn Bridge