This report describes the creation of a 3D geological model developed by the British Geological Survey (BGS) for the UK Geoenergy Observatories (UKGEOS) Glasgow Geothermal Energy Research Field Site (GGERFS). The model represents the bedrock geology, fault network, and underground mine workings. The model has been used to aid borehole prognosis and initial hydrogeological modelling. The 3D geological model described here uses subsurface data held prior to the construction of the Observatory and represents our 鈥榩re-drill鈥?understanding of the bedrock and mine geometry. The pre-drill superficial deposits model is also available and is described in Arkley (2018).