From minedat.org
“Westbury Brook was opened in 1837 by the Dowlais Company and closed in 1893, during which time almost a million tons of iron ore was produced. The mine was worked on 4 levels: Levels 1 and 2 from the 360 feet deep Old shaft, whilst Levels 3 and 4 were driven from the 670 feet deep Westbury Brook Shaft.
Today only the 1st and 2nd levels are accessible; the 3rd and 4th being permanently flooded. The Old shaft was filled in the 1960s, but the Westbury Brook shaft has a concrete cap on it with an access hatch.”
https://www.mindat.org/loc-211351.html
