We recently provided sub-consultancy support in connection with the stability of proposed high walls to a coal extraction facility. The work required the appraisal of the geology, hydrogeology and past mining at the confidential site in Yorkshire,  before an appraisal of the stability issues was completed to support preliminary slope design recommendations. The assessment required the ground risk around the proposed works to be zoned, and required too consideration of the potential impact of the coal extraction on third party infrastructure.