Glen Finglas Dam And Hydro-Electric Power Station (Former Glasgow Corporation Water Works) is a Grade C listed building in the Loch Lomond and the Trossachs National Park local planning authority area, Scotland. First listed on 18 August 2008. Dam, hydro-electric power station.

Glen Finglas Dam And Hydro-Electric Power Station (Former Glasgow Corporation Water Works)

WRENN ID
seventh-chapel-laurel
Grade
C
Local Planning Authority
Loch Lomond and the Trossachs National Park
Constituency
Stirling and Strathallan MP: Chris Kane (Lab)
Country
Scotland
Date first listed
18 August 2008
Type
Dam, hydro-electric power station
OS grid reference
NN 529 079
Coordinates
56.24088, -4.37359
Source
Historic Environment Scotland listing

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

Description

Glen Finglas Dam and Hydro-Electric Power Station, formerly known as the Glasgow Corporation Water Works, was designed by consulting engineers Babtie, Shaw and Morton between 1963 and 1965. This gently curved concrete gravity dam stands 115 feet high and stretches 720 feet long, featuring a steeply battered southern side that curves to a vertical top. Atop the dam is a flat-roofed valve house with strip windows located east of the center. A walkway with a parapet and railings runs to the west of the valve house. To the east of the valve house is an overflow spillway, which has steep curved steps fanning out at the base to the far right, accompanied by a rubble wall. Below the valve house is a small, rubble-clad hydro-electric power generating house that includes a large picture window facing south, a two-leaf timber-boarded door to the west, a cantilevered balcony, and a very shallow pitched roof. There is an arched tunnel entrance to the dam located to the west of the hydro-electric power station. A low concrete weir leads to the outlet basin below the dam, and there is a circular-plan viewing platform with concrete steps situated to the west of the weir. A commemorative plaque can be found near the western end of the dam.

Local climate

Glen Finglas Dam And Hydro-Electric Power Station (Former Glasgow Corporation Water Works) sits in one of the wettest parts of the UK, with an average of 1,630 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.

It experiences an average of 61 freeze-thaw cycles a year, more than 98% of listed buildings. Of these, 39 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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