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Part of the original plan for the Elan Valley reservoirs was Dol-y-Mynach, at the western end of Caban Coch reservoir in the lower Claerwen Valley. The plan, which envisaged three reservoirs in the Claerwen Valley, were shelved, and the bas of the never-completed Dol-y-Mynach dam still stands, though is submerged when the water level is high. In 1957 the Claerwen Dam was opened, providing far more capacity then the planned three reservoirs together.

Dol-y-Mynach dam in the Elan Valley
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Vulcan Lodge
  • Self Catering cottages
  • Sleeps 25, 10 bedrooms
  • £265 to £775 per week
  • Wifi
  • Pets welcome
  • Accessible