North of Scotland Hydro-Electric Board |

Clunie Arch, a memorial to some of the men who lost their lives building the hydro schemes

The dramatic story behind ‘Power to the Glens’ has interested me for years. So widespread was the scheme that you don’t have to go far to find a dam or power station linked to the Hydro. Wonderful feats of civil engineering, with clean and beautiful designs that leave no scars on the landscape.

The scheme was designed to bring power to the glens through the work of the North of Scotland Hydro-Electric Board (1943–1990) and was masterminded by Kirkintilloch-born politician Tom Johnston (1881-1965). Johnston was a Labour MP and Secretary of State for Scotland during WW2, and was determined to improve life for the people of the Highlands and Islands.

Pitlochry Dam

The Hydro Board was tasked with the enormous challenge of designing, constructing and managing hydro electricity projects throughout the Highlands of Scotland: an expanse that covers almost a quarter of the total land area of Britain, yet with only about three percent of the population.

However, as it’s an area with the highest mountains, largest inland lochs and most bountiful rainfall in Scotland, it definitely has the perfect ingredients required to create hydro electricity!

The Hydro comes to Out Skerries, Glasgow Herald, October 29 1983

Think how much we take heat and light for granted. It may be wet and miserable outside, but we know we have bright, warm homes waiting for us. Every now and then an unexpected power cut might serve to remind us what life was like before everything was available at the flick of a switch. But it’s not a situation we’d want to last for long! And I suspect most of us would be hard put to really understand what life was like before mains electricity was available throughout Scotland.

Incredibly, it wasn’t until the 1960s, and thanks to the work of the North of Scotland Hydro-Electric Board, that 90% of the Highlands were finally attached to the national grid. A figure more than double pre-war provision. And many more years passed until that connection was nationwide. It’s an inspiring story of how belief in a better society for all can change the lives of so many. If there’s a will to do so.

And Tom Johnston had that will. I often wonder what he and his contemporaries would make of Westminster today? Not a lot, I suspect. But without a shadow of a doubt, there’s much that today’s politicians could learn from Tom Johnston!

My article about the advent of hydro-electricity, Tom Johnston, the North of Scotland Hydro-Electric Board, the Hydro Boys and those extraordinary Tunnel Tigers, appears in issue 62 of iScot magazine. And what a story it is!

It was freezing cold, with snow in the air and on the hills, and colder the higher we went. But, as so often when walking in Scotland, we knew the destination would be worth it. And that destination was the Loch Sloy dam, flanked by the mighty and rugged Ben Vorlich.

Parking at Inveruglas Visitor Centre on the west bank of Loch Lomond, we followed the signposts for Loch Sloy & Hills, which took us past the impressive Loch Sloy Hydro-Electric power station. Construction of the dam began in May 1945 and was the first in the North of Scotland Hydro-Electric Board’s revolutionary scheme. Work was completed in 1949 and the station officially ‘switched on’ in October 1950. The construction work was back-breaking and dangerous, with twenty-one men losing their lives in the process.

Loch Sloy Hydro-Electric station on Loch Lomond

The dramatic history of ‘Power from the Glens’ has long interested me. The water for this power station comes from Loch Sloy, high in the hills, with its massive dam, 56 metres high and 357 metres long. From here it is channelled through a 3km tunnel, hewn through of the massive side of Ben Vorlich. On reaching the valve house it thunders down through four mammoth pipes to drive the turbines below. Such is the power of the water that the station can generate enough electricity to meet sudden peaks in demand, reaching full-capacity within 5 minutes of a standing start!

It’s a straightforward walk, a round-trip of 11km. When you reach the access road to the dam, walk under the railway bridge and then it’s up! And the higher you go, the better the views of Loch Lomond and the surrounding hills become. The construction of the Loch Sloy dam and power station was, quite literally, a groundbreaking start to one of the most progressive and far-reaching engineering projects in the world. So when you reach the dam, take a look at your map, and wonder at how it was possible, all those years ago, to carve such tunnels through these mountains. Some of the work force were even prisoners-of-war awaiting repatriation. In a booklet published by Scottish Hydro Electric, due credit is given to these men:

“After the Second World War, men from all over Scotland came to work on the schemes, attracted by high wages. The highest wages were earned by the men who dug the tunnels. Germans, Poles and Czechs were acknowledged to be skilled tunnellers. They became known as the ‘Tunnel Tigers’ because of their cavalier approach to safety in their quest to earn the huge bonuses that were available. The lower regard for health and safety issues than there is today inevitably led to high accident rates and deaths amongst the workers. No definitive accident statistics exist, but in one camp alone, which housed some 1,000 workers at its peak, there were 22 deaths in just one year. For the vast majority of workers the rewards were great. In the late 1940s, a ‘Tunnel Tiger’ could expect to earn up to £35 a week, compared to £3 or £4 for a Highland estate worker. Mostly they lived in temporary work camps built near the construction sites. Not surprisingly, the sites looked like military camps, sometimes housing up to 3,000 men.”

The scheme was masterminded by Scottish politician Tom Johnston (1881-1965) and, under the auspices of the North of Scotland Hydro-Electric Scheme, succeeded in bringing power to the glens in a way never before imaginable. By 1963 90% of the Highlands were attached to the grid, more than twice as many as when the scheme began just after the Second World War. ‘Power from the Glens’ ultimately changed the face of rural Scotland and the benefits continue to this day.

Their achievements are all the more remarkable given the harsh conditions and often unforgiving terrain they had to work in, and we owe them a great deal. For not only is Scotland a country of great natural beauty, but it’s also one rich in natural resources. And so it’s doubly remarkable that Tom Johnston and his fellow visionaries harnessed hydro-power without damaging the landscape, and also left dams and power stations of great stature and beauty.

As renewable and sustainable energy become increasingly important, the hydro-power schemes these men bequeathed us become equally more significant. We need renewable energy like hydro-power: and in a country of rivers, lochs and plentiful rain, hydro-power is definitely here to stay!