Episode 1 of 3
Dam Failure
- When
- 11 March 1864
- Where
- Dale Dyke Reservoir
The newly built dam collapsed at 23:30 on 11 March 1864, assisted by a strong south-western gale, releasing a wall of water.
The failure occurred the day after the reservoir was finally full. A crack in the embankment was the immediate cause, though its origin was never determined. The collapse released an estimated 3 million cubic metres of water.
Sources
- Dale Dike Reservoir Wikipedia, revision of 2026-08-28
- Great Sheffield Flood Wikipedia, revision of 2026-09-02
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.