The Spectator

Barometer | 8 August 2019

issue 10 August 2019

Dams, lives and statistics

The town of Whaley Bridge, Derbyshire, was evacuated after heavy rainfall caused the partial collapse of a reservoir slipway. No one has been killed in a dam collapse in Britain since 1925, but the worst incidents up to that date were:

— Dale Dyke, Sheffield, 1864. Puddle clay core of dam fractured while the reservoir behind it was being filled for the first time. 244 were killed.
—Biberry Dam, Holmfirth, W. Yorkshire, 1852. Dam had settled since construction 17 years earlier. Water overtopped the dam during a storm, causing collapse. 81 died.
— Whinhill Dam, Greenock, 1835. Embankment had been undermined by burrowing rats and moles. 31 died.
— Dolgarrog, N. Wales, 1925. Leak in upper dam caused its failure. Cascading water caused collapse of lower dam. Later examination suggested the foundations had been unsatisfactory. 16 were killed.


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