30 September 1935: The Hoover Dam is dedicated
On this day in 1935, thousands of spectators crowded into Black Canyon to see Franklin D Roosevelt celebrate the completion of “the greatest dam in the world”.
On 30 September 1935, ten thousand spectators crowded into Black Canyon, on the banks of the Colorado River. There, in the scorching heat, they listened, while millions more crowded round their radios at home.
US president Franklin D Roosevelt had arrived to "celebrate the completion of the greatest dam in the world" the Boulder Dam' and definitely not the Hoover Dam'.
Leading up to the dedication ceremony, a row had broken out over what the dam would be called. At a ceremony to mark the start of construction to build a railway from Las Vegas to the dam in 1930, the secretary of the interior, Ray Lyman Wilbur, had taken it upon himself to name the future dam after the then president, Herbert Hoover.
MoneyWeek
Subscribe to MoneyWeek today and get your first six magazine issues absolutely FREE
Sign up to Money Morning
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
His successor, Harold L Ickes, was furious. During his own speech to mark the completion of the dam, Ickes repeated the name “Boulder Dam” over and over to drive the point home. And to be fair, Boulder Dam was how most people knew it. The press almost always referred to it as Boulder Dam, and it was the "Boulder Canyon Project Act" that President Calvin Coolidge had signed off in 1928.
After four years, the dam – whatever you choose to call it – was all but completed. Only the powerhouse had yet to be finished by the time Roosevelt gave his speech. The dam, rising 221 metres over the Colorado River, had been completed two years early at a cost of $49m – around $850m in today's money.
Sadly, the dam had also cost the lives of over a hundred workers, who toiled in the extreme heat in often perilous conditions. Nearby Las Vegas, a town of just a few thousand, swelled with the arrival of thousands of unemployed labourers and their families – this was the Great Depression, after all – and the town of Boulder City rose up out of the desert.
In the years that followed, the reputation of Herbert Hoover rose in the public's estimation, and the name Boulder Dam gradually made way for the former president's. In 1947, amid much teeth-grinding from Ickes, Congress unanimously voted to settle on the name Hoover Dam.
Get the latest financial news, insights and expert analysis from our award-winning MoneyWeek team, to help you understand what really matters when it comes to your finances.

-
Millions at risk of 'unnecessary' tax bill – how to shield your savingsMillions of Brits could be taxed on their savings interest this year as their savings interest exceeds the personal savings allowance. Are you at risk?
-
Savers will have to wait as long as 48 years to build a £1m cash ISA pot if allowance is cutChancellor Rachel Reeves is rumoured to be planning a cut to the cash ISA allowance in the Autumn Budget, making it harder for savers to build wealth. Will you still be able to build a £1 million cash ISA pot?
-
31 August 1957: the Federation of Malaya declares independence from the UKFeatures On this day in 1957, after ten years of preparation, the Federation of Malaya became an independent nation.
-
13 April 1960: the first satellite navigation system is launchedFeatures On this day in 1960, Nasa sent the Transit 1B satellite into orbit to provide positioning for the US Navy’s fleet of Polaris ballistic missile submarines.
-
9 April 1838: National Gallery opens in Trafalgar SquareFeatures On this day in 1838, William Wilkins’ new National Gallery building in Trafalgar Square opened to the public.
-
3 March 1962: British Antarctic Territory is created
Features On this day in 1962, Britain formed the British Antarctic Territory administered from the Falkland Islands.
-
10 March 2000: the dotcom bubble peaks
Features Tech mania fanned by the dawning of the internet age inflated the dotcom bubble to maximum extent, on this day in 2000.
-
9 March 1776: Adam Smith publishes 'The Wealth of Nations'
Features On this day in 1776, Adam Smith, the “father of modern economics”, published his hugely influential book The Wealth of Nations.
-
8 March 1817: the New York Stock Exchange is formedFeatures On this day in 1817, a group of brokers moved out of a New York coffee house to form what would become the biggest stock exchange in the world.
-
7 March 1969: Queen Elizabeth II officially opens the Victoria Line
Features On this day in 1969, Queen Elizabeth II took only her second trip on the tube to officially open the underground’s newest line – the Victoria Line.