September 15, 2011 : Shortly after 9am, seven miners in the privately-owned Gleision drift mine in Cilybebyll use explosives on a narrow coal seam.
Water bursts through the tunnel.
Three men escape, but four remain trapped underground.
Emergency services arrive later that morning. The site is sealed off.
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Mid and West Wales Fire and Rescue Service request assistance of Mines Rescue units from Wales and across the United Kingdom.
The four miners are trapped at a depth of 90 metres (300 ft) below the surface.
The Evening Post arrives on the site around midday.
Other media follow shortly afterwards.
Rhos Community Centre becomes the base for media and family. Businesses and individuals from across Swansea arrive to donate items such as food to the families and emergency services.
As evening falls, no official announcement has been made on whether the men are dead or alive.
September 16: Rescue teams have worked through the night in an attempt to reach the trapped men.
Politicians arrive to offer their support. They include Peter Hain, Sian James, Gwenda Thomas and Welsh Secretary Cheryl Gillan.
By the end of the afternoon, police confirm that all four men have died.
They are named as Charles Breslin, 62; David Powell, 50; Garry Jenkins, 39; and Philip Hill, 44.
September 17 The Swansea Valley Miners' Fund is launched, for the families of the four men. It goes on to raise more than £1 million.