Loch Ericht Refurbishment
This project for Scottish & Southern Energy involved construction work on Dalwhinnie and Ericht dams at Loch Ericht. This reservoir is over 24km long, is owned and operated by Scottish & Southern Energy plc, and supplies the Rannoch Hydropower station as part of the Tummel Hydro Electric Scheme.
Following a statutory inspection in June 2000 under the Reservoirs Act 1975, both dams were subject to more severe design flood standards, the result of which was that the freeboard and overtopping protection was inadequate. The refurbishment works include raising and extension of both dams, strengthening of the upstream and downstream faces at Dalwhinnie Dam and improvements to the spillway basin at Ericht dam.
At Dalwhinnie Dam the principal works carried out were extensions to the abutment corewalls in mass concrete, raising of the wave wall by 2m in pre-cast concrete and infill at the dam mitres. In addition the upstream and downstream faces and dam crest were protected with open stone asphalt.
At Ericht Dam a wave wall 1m high was constructed in reinforced concrete, with a berm constructed above the dam crest level, armouring to the crest and rip-rap protection to the upstream face. In the outlet channel of the dam, concrete encapsulation was provided to the scour penstock and reinforced concrete strengthening installed in the spillway.
Ultimate Client: Scottish & Southern Energy
Value: £1.3 million
Location: Dalwhinnie, Perthshire
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Following a statutory inspection in June 2000 under the Reservoirs Act 1975, both dams were subject to more severe design flood standards, the result of which was that the freeboard and overtopping protection was inadequate. The refurbishment works include raising and extension of both dams, strengthening of the upstream and downstream faces at Dalwhinnie Dam and improvements to the spillway basin at Ericht dam.
At Dalwhinnie Dam the principal works carried out were extensions to the abutment corewalls in mass concrete, raising of the wave wall by 2m in pre-cast concrete and infill at the dam mitres. In addition the upstream and downstream faces and dam crest were protected with open stone asphalt.
At Ericht Dam a wave wall 1m high was constructed in reinforced concrete, with a berm constructed above the dam crest level, armouring to the crest and rip-rap protection to the upstream face. In the outlet channel of the dam, concrete encapsulation was provided to the scour penstock and reinforced concrete strengthening installed in the spillway.
Ultimate Client: Scottish & Southern Energy
Value: £1.3 million
Location: Dalwhinnie, Perthshire
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