Raspadskaya coal mine

[2] Based on the volume produced in 2007, reserves-to-production ratio amounts to about 55 years of production.

[citation needed] The complex produces 10% of Russia's coking coal.

[citation needed] The mine is owned and operated by Raspadskaya OAO, a Russian publicly listed coal company.

[citation needed] On 8 May 2010, an explosion occurred killing 66 workers.

By contrast, the worst rate that occurred at the Aliso Canyon gas leak in California was 60 metric tons an hour.