Past shallow coal mine workings are derived from the Coal Authority’s records of underground coal mine workings. This dataset has been created by extracting all those underground workings, or parts thereof, whose depth is 30 metres or less from the surface. Shallow workings do not have sufficient overlying strata therefore any movement has the potential to reach the surface and cause damage; approx 50% of the accepted surface hazards are related to shallow workings, both recorded and unrecorded.
