 They had to work the difficult geology near the southern outcrop.Closed in 1904, the colliery is remembered for a mining accident that occurred at 8.20 am on 26 August 1892 as 146 men and boys were working within the mine.This was the day of the annual St Mary Hill Fair and a fine day with everyone looking forward to a day of relaxation, but they all heard the explosion and knew immediately what it meant.