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Clatteringshaws Dam
Dumfries & Galloway, Scotland, UK
Clatteringshaws Dam
associated engineer
Sir Alexander Gibb & Partners
date  September 1932 - 1938
era  Modern  |  category  Dam/Reservoir  |  reference  NX544753
ICE reference number  HEW 1457/01
photo  © and licensed for reuse under this
Clatteringshaws Dam is on the south western branch of the Galloway Hydro-Electric Project, in an area where rainfall can exceed 2m per year. The dam impounds the headwaters of the River Dee in Clatteringshaws Loch, which is then diverted north east through a tunnel to Glenlee Power Station.
The dam is a concrete gravity structure, 448m long and slightly curved in plan, to a radius of about 915m. It has a maximum height of 23.8m measured from river bed to the crest footway, which is carried on a series of arches. The central spillway has an effective length of 106.7m.
It is founded on sound granite, practically free from significant fissures. To ensure a solid foundation, the bedrock under the entire length of the dam wall between abutments was grouted. This was done using 6.1m deep holes drilled at intervals into the granite.
The dam superstructure was built up in sections, each about 15m wide. The intervening spaces of 1.8m between sections were infilled once the concrete had finished contracting. A concrete batching plant was set up near the east end of the dam and concrete was supplied from there to the works by steam jib cranes running on rails.
The reservoir formed behind (to the north) the dam is some 415 hectares in extent and has a capacity of 35.4 million cubic metres. The draw-off tower (NX551777) for the tunnel aqueduct to Glenlee Power Station (NX606805) is at the north east corner of the reservoir, some 2.4km from the dam.
Clatteringshaws Loch and Dam are within the Galloway Forest Park, 8km west of New Galloway. Work started in September 1932, the dam was completed in 1934. The reservoir was formed by 1938.
At Moss Raploch on the eastern shore of the loch is Bruce’s Stone (NX551769) — suppposedly where the Scottich king Robert I (Robert the Bruce, 1274-1329) rested after fighting the English in 1307.
Contractor: Shanks McEwan Ltd
Research: ECPK
"Galloway Hydro-Electric Scheme", information leaflet
available at www.scottishpower.com
"Galloway Hydros", series of factsheets
available at www.spenergywholesale.com
reference sources   CEH SLB

Clatteringshaws Dam