 By 1923, the pit was producing some 1 million tons of manufacturing and steam coal per year, from the Top Hard or Barnsley Bed seams.There were 717 underground workers and 216 on the surface, but this was reduced from 1896, as the numbers reflected the workforce at both Shireoaks and Steetley.Ten years later, the numbers were 560 underground and 150 on the surface, with a further 460 and 70 working at Steetley.