A coal mine fire in Haas Canyon, Colorado was ignited by spontaneous combustion in 1916 and has withstood all efforts to put it out. The 900 to 1700 degree fire was quenched by a heat-resistant foam mixed with grout in 2000.
A coal mine fire in Haas Canyon, Colorado was ignited by spontaneous combustion in 1916 and has withstood all efforts to put it out. The 900 to 1700 degree fire was quenched by a heat-resistant foam mixed with grout in 2000.