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The Western Mostyn Colliery Company was formed in 1873 with the purpose of investigating the potential of a coal mine at Point of Ayr, in Flintshire, Wales.
They were the second company to attempt borings at the site, after the Prestatyn Coal Company tried in 1865.
A shaft 100 yards (91 m) deep was sunk; however, the heading that was driven from this shaft hit a fault and the project was abandoned once more.
References
Western Mostyn Colliery Company Wikipedia(Text) CC BY-SA