Blackadder Bridge, Blackadder Water, Allanton is a Grade B listed building in the Scottish Borders local planning authority area, Scotland. First listed on 9 June 1971. Bridge.

Blackadder Bridge, Blackadder Water, Allanton

WRENN ID
long-gallery-dawn
Grade
B
Local Planning Authority
Scottish Borders
Constituency
Berwickshire, Roxburgh and Selkirk MP: John Lamont (Con)
Country
Scotland
Date first listed
9 June 1971
Type
Bridge
OS grid reference
NT 863 545
Coordinates
55.78371, -2.21857
Source
Historic Environment Scotland listing

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

Description

Blackadder Bridge, built in 1851, is a flat elliptical-arched bridge that runs east to west across Blackadder Water in Allanton. The bridge is constructed from yellow sandstone with channelled ashlar dressings, and features stugged squared and snecked sandstone at the quadrants. It has a rounded cornice with an ashlar parapet and coping. There is a pointed pier in the middle, topped with a pilaster, and pilasters flanking the bridge wall. A plaque made of ashlar displaying the name and date is located on the roadside of the northern parapet.

Local climate

Blackadder Bridge, Blackadder Water, Allanton receives an average of 840 mm of rain a year. This makes it wetter than 57% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 55% of listed buildings.

It experiences an average of 15 freeze-thaw cycles a year, fewer than 85% of listed buildings. Of these, 10 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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  • No sale records on file
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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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