Mid Hermiston Bridge, Union Canal is a Grade B listed building in the City of Edinburgh local planning authority area, Scotland. First listed on 31 January 1981. Bridge.

Mid Hermiston Bridge, Union Canal

WRENN ID
swift-rood-juniper
Grade
B
Local Planning Authority
City of Edinburgh
Constituency
Edinburgh South West MP: Dr Scott Arthur (Lab)
Country
Scotland
Date first listed
31 January 1981
Type
Bridge
OS grid reference
NT 175 703
Coordinates
55.91934, -3.32156
Source
Historic Environment Scotland listing

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

Description

Mid Hermiston Bridge, built around 1820 by engineer Hugh Baird, is a single span bridge located on the Union Canal. It is constructed of coursed sandstone with ashlar dressings. The bridge features a segmental arch with a hog's back profile, dressed voussoirs, and a soffit. An advanced keystone is inscribed with the number '11'. There is a string course, and plain clairvoyee railings are situated between the parapet walls, topped with ashlar slab coping.

Local climate

Mid Hermiston Bridge, Union Canal sits in a wetter-than-average part of the UK, with an average of 970 mm of rain a year. This makes it wetter than 78% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 53% of listed buildings.

It experiences an average of 47 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 28 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°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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  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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