Los Ríos Region
Some of the better known coal mines of Los Ríos Region are: Arrau, Catamutún, Ciruelo, Máfil, Mulpún and Pupunahue. While these mines had occasional spurts in activity only Catamutún was in continuous operation in the 1940s–2001 period. Mining in Catamutún, the only active coal mine in Los Ríos Region at the time, halted after an underground fire in 2001.