The Western Mostyn Colliery Company was formed in 1873 with the purpose of investigating the potential of a coal mine at Point of Ayr

Point of Ayr

Point of Ayr is the northernmost point of mainland Wales. It is situated immediately to the north of Talacre in Flintshire, at the mouth of the Dee estuary. It is to the southwest of the Liverpool Bay area of the Irish Sea...

, in Flintshire

Flintshire

Flintshire is a county in north-east Wales. It borders Denbighshire, Wrexham and the English county of Cheshire. It is named after the historic county of Flintshire, which had notably different borders...

, North Wales

North Wales

North Wales is the northernmost unofficial region of Wales. It is bordered to the south by the counties of Ceredigion and Powys in Mid Wales and to the east by the counties of Shropshire in the West Midlands and Cheshire in North West England...

.

They were the second company to attempt borings at the site, after the Prestatyn Coal Company

Prestatyn Coal Company

The Prestatyn Coal Company was formed in 1865, by Lord Mostyn, owner of Mostyn Colliery, to investigate the possibility of a colliery at Point of Ayr, in Flintshire, North Wales....

tried in 1865.

A shaft 100 yards (91.4 m) deep was sunk, however the heading that was driven from this shaft hit a fault and the project was abandoned once more.