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

Contest #717: Loch Mullardoch Dam, Scotland

The Loch Mullardoch Dam is located in northwest Scotland was constructed between 1947 and 1952 to provide a source of water for power generation. Water from Loch Mullardoch is taken via a 5 km tunnel south to Loch Benevean where it ends up at the Fasnakyle power generation station.

The reference to Munros is to mountains or hills above 914 metres / 3000’. There are 282 Munros across Scotland, with 10 of them around Loch Mullardoch. Climbers of these 10 Munros park at the dam and can start climbing from there or can take a boat down the lake to avoid walking down the lake.

The dam:

The tunnel:

https://canmore.org.uk/site/81412/mullardoch-dam

Found this smaller dam:

  • hhgygy
  • Garfield
  • Eloy Cano
  • Martin de Bock
  • Paul Voestermans
  • Phil Ower
  • Lighthouse
  • Glenmorren

After the hint:

  • Gillian B
  • Graham Hedley
  • Robert

Contest #713: the spillway at the Robert Bourrassa hydroelectric station, Quebec, Canada

The Robert-Bourassa generating station is a hydroelectric power station on the La Grande River that is part of Hydro-Québec’s James Bay Project in Canada. The station can generate 5,616 MW.

The image is centered on the massive spillway named Staircase of the Giants or Giant’s Staircase. Each of the 10 massive steps is about 10 metres high.

Located the spillway in advance of the hint:

  • Paul Voestermans
  • Phil Ower
  • Glenmorren
  • hhgygy
  • Garfield
  • Martin de Bock
  • Eloy Cano
  • Lighthouse
  • Graham Hedley

After the hint:

  • Robin
  • Robert

Contest #712: Qattinah Dam, near Homs, Syria

The Lake Homs Dam, also known as Qattinah Dam, is a Roman-built dam near the city of Homs, Syria, which is in use to this day.

It was thought that Egyptian ruler Sethi (1319–1304 BC) built this dam but it now recognized that this structure dates to 284 AD when it was built by the Roman emperor Diocletian (284–305 AD) for irrigation purposes. With a capacity of 90 million m³, it is considered the largest Roman reservoir in the Near East and may have even been the largest artificial reservoir constructed up to that time.

Found this dam site:

  • Lighthouse
  • hhgygy
  • Eloy Cano
  • Phil Ower
  • Paul Voestermans
  • Martin de Bock
  • Garfield

After the slightly late hint:

  • Ashwini Agrawal
  • LawnBoy
  • Gillian B.
  • Robin
  • Graham Hedley
  • krenek