Railway Viaduct, River Irvine, Laigh Milton Mill is a Grade A listed building in the South Ayrshire local planning authority area, Scotland. First listed on 4 August 1978. Bridge.

Railway Viaduct, River Irvine, Laigh Milton Mill

WRENN ID
ragged-spire-saffron
Grade
A
Local Planning Authority
South Ayrshire
Constituency
Central Ayrshire MP: Alan Gemmell (Lab)
Country
Scotland
Date first listed
4 August 1978
Type
Bridge
OS grid reference
NS 383 369
Coordinates
55.59882, -4.56716
Source
Historic Environment Scotland listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The Railway Viaduct at Laigh Milton Mill, built in 1812, is a stone bridge that spans the River Irvine. It features four rounded arches and rounded cutwaters, which have half-column buttresses that rise through deck bands to the level of the parapet. The structure is made of coursed rubble masonry, with rusticated free-stone used for the arch voussoirs, cutwaters, and buttresses. The abutments on the banks curve outward, and railway tracks approach the bridge through cuttings. Currently, the bridge deck is overgrown, and the parapets have collapsed. There is a piece of thin metal rail in the fence on the east abutment.

Local climate

Railway Viaduct, River Irvine, Laigh Milton Mill sits in one of the wettest parts of the UK, with an average of 1,450 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.

It experiences an average of 24 freeze-thaw cycles a year, fewer than 74% of listed buildings. Of these, 12 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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