The earth opens: Timeline of Drumgossat mine collapse
1989 Gyproc ends gypsum extraction at Drumgossat mine but the tunnels remain in use to store water from adjacent Drummond mine.
2005 Last underground inspection of Drumgossat tunnels takes place. They become too flooded for inspection.
October 2016 Last subsidence check of community lands above Drumgossat mine takes place after they are declared stable.
June 22, 2018 Workers at Drummond mine break through rock into a previously undetected water source, resulting in a major flooding emergency.
June-September 2018 Gyproc pumps millions of litres of water into Drumgossat to ease the flooding. The water undermines support pillars.
September 23, 2018 Support pillars give way and dramatic sinkholes, cracks and crevices appear beneath Magheracloone community centre, GAA grounds and clubhouse, destroying them.
December 20, 2018 The LP4900 road, recently reopened after subsidence fears, is closed when a sinkhole appears nearby. It remains shut until last week.
September 2019 The GAA club remains in temporary accommodation provided by Gyproc, awaiting a permanent new home. There is no community centre. Gyproc outlines plans for a new opencast mine on site of Drumgossat collapse. Investigations continue into the June 22 incident.