The main challenge was the pressure tunnel from Loch Treig under the Ben Nevis massif, which commenced in summer 1926. The tunnel was dug by hand through the solid rock, with compressed air drills used to bore holes for the explosive charges.

2022年9月21日 · The most remarkable feature of the scheme was the construction of a pressure tunnel 15 miles long beneath Ben Nevis, from Loch Treig to the entry with steel pipes situated 600 ft above the power station at Fort William.

The main challenge was the pressure tunnel from Loch Treig under the Ben Nevis massif, which commenced in summer 1926. The tunnel was dug by hand through the solid rock, with compressed air drills used to bore holes for the explosive charges.

2011年11月14日 · The Lochaber powerhouse and smelter form part of one of the most significant British engineering achievements of the 20th century. The creation of a pressure tunnel bored through solid bedrock under the flanks of Ben Nevis to connect the powerhouse with the Laggan and Treig reservoirs was a major technological achievement.

The main challenge was the pressure tunnel from Loch Treig under the Ben Nevis massif, which commenced in summer 1926. The tunnel was dug by hand through the solid rock, with compressed air drills used to bore holes for the explosive charges.

At the eastern end the tunnel enters Loch Treig and at the western end, beneath Ben Nevis at Fort William in Lochaber it feeds the power station that supplies our aluminium smelter. The area is amongst the highest rainfall regions of Scotland which with its abundant supply of water made it ideal for a large hydroelectric scheme.

Stage 1 involved feeding the waters through a concrete lined pressure tunnel and through steel penstocks to a power station. The main tunnel was driven through the massif centred on Ben Nevis, it was 5m in diameter and had length of 24kml it was the longest water-carrying tunnel in the world at the time.

Treig is the principal storage for the Lochaber scheme, and receives water from Laggan and Spey via a tunnel. Water is outlet from the dam into a 15 mile long pressure tunnel through to the valve house and surge tower (see separate records).

The most remarkable feature of the scheme was the construction of a pressure tunnel 15 miles long beneath Ben Nevis, from Loch Treig to the entry with steel pipes situated 600 ft above the...

The Lochaber powerhouse and smelter were part of one of the most significant British engineering achievements of the 20th century. The creation of a pressure tunnel bored through solid bedrock under the flanks of Ben Nevis to connect the powerhouse with the Laggan and Treig reservoirs was a major technological achievement in 1929.