The first of the Elan Valley Dams, constructed that when water is flowing over the top of dam it will look like a waterfall.
Height - 122 ft above river bed
Length - 566 ft
Total capacity - 8,000,000,000 gallons
Here are some photos of the magazine hut near Caban Coch Dam, the magazine was built away from the construction of the dam and explosives would of been kept securely inside.