66145 passes Cefn Coed Colliery on 16 March 2002 with the Pathfinder Tours 1Z38 15:45 Onllywyn to Sheffield 'Valley Voyager' railtour. Cefn Coed Colliery was opened in 1926, and eventually the shaft reached a depth of 2,500 feet, making it the deepest anthracite mine in the world at the time. The mine closed in 1968, but Blaenant Colliery opened up right next door, but that had also closed by 1990. Today the site is a museum, although unfortunately without any access the underground workings.