Contest #718: the remains of the Castlewood Canyon Dam, Colorado, US

On August 3rd, 1933, the Castlewood Canyon collapsed after a large amount of rain, and the results were felt downstream. A wave of water down the canyon towards Denver. Peak discharge immediately downstream was later estimated at 126,000 cubic feet per second (cfs).

The dam had issues in the past, with minor collapses, but Was considered in good repair at the time of the collapse.

Found before the hint:

  • Martin devBock
  • Phil Ower
  • Eloy Cano
  • Ivar Bonsaksen
  • Lighthouse
  • Robert
  • Garfield

After the hint

  • Robin
  • Gillian B
  • Paul Voestermans
  • LawnBoy
  • Graham Hedley
  • hhgygy

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