 The coal mined was in a seam known as Thin Coal, 25,000 tons a year being produced by the colliery in the last two decades it operated.The shaft was 468 feet deep, the seam was a half-yard (18 inches) thick and 900 feet underground at the furthest point from the shaft, and ultimately entailed a long walk of about two and a half miles of gradual slope to and from the coalface.The area worked for coal extended between the Shrewsbury-Yockleton road in the north, Wood Hall and Moat Hall in the south, Cruckton and Shorthill in the west and Hanwood Bank to the east.