Work on the colliery – one of the pioneering mines of the East Durham coalfield, began on 19 February 1838 but it was five years before the first coals were drawn. Problems with pockets of shifting sand and the depth of the magnesium limestone overlying the coal delayed the work, making the project hugely expensive. Late shifts were even introduced for the first time, so that excavation could be carried out around the clock to finish the three-shafted pit as quickly as possible.