Gartmorn Lade, Forestmill is a Grade B listed building in the Clackmannanshire local planning authority area, Scotland. First listed on 22 June 1972. Weir.

Gartmorn Lade, Forestmill

WRENN ID
veiled-parapet-torch
Grade
B
Local Planning Authority
Clackmannanshire
Constituency
Dunfermline and Dollar MP: Graeme Downie (Lab)
Country
Scotland
Date first listed
22 June 1972
Type
Weir
OS grid reference
NS 953 938
Coordinates
56.12602, -3.68434
Source
Historic Environment Scotland listing

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

Description

Gartmorn Lade in Forestmill is a notable weir designed by engineer George Sorocold in 1711-12 and rebuilt in 1835. This rare and striking horse-shoe plan weir is an early design created to direct water from the River Black Devon, which flows from east to west, through a sluice into the Forestmill Lade and return floodwater back over the top of the weir into the river. It was built as part of a water management system initiated by John Erskine, Earl of Mar, which includes sluices controlling the water flow to a 2.5-kilometer lade leading to Gartmorn Dam, the oldest reservoir in Scotland.

The weir is constructed from ashlar stone and features a raised platform made of large slabs arranged around a curve of squared stonework, which encompasses a deep basin seemingly set on bedrock. The sides of the weir slope down to the west, reaching a height of approximately 4 feet.

Local climate

Gartmorn Lade, Forestmill sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 81% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 52% of listed buildings.

It experiences an average of 53 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 29 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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  5. Hartshaw Farm Grade B 2.4 km
  6. Corn Mill, Hartshaw Grade C 2.4 km
  7. Dollarbeg Grade B 3.1 km
  8. Wester Sheardale Grade B 3.3 km
  9. Ochilton, Devon Road, Dollar Grade B 3.9 km
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