Underground Coal Seams Can Spontaneously Combust And Burn For Decades. Here's How Officials Keep Colorado's 38 Fires Under Control

Tending to a below-ground fire is unlike fighting ones above ground.

Colorado to start mitigating underground coal mine fire near Marshall Fire ignition point in Boulder County - CBS Colorado

Underground Coal Fires – Emerging as a global threat with significant economic, social and ecological impacts

Dangerous legacy: Tens of thousands of Coloradans live near one of the state's many underground coal-mine fires, Subscriber Content

Colorado coal-seam fire just discovered has been burning underground for over a year, officials say

Geomorphology of coal seam fires - ScienceDirect

The Coal Legacy that Led to Colorado's Most Destructive Fire

Deadly Colorado blaze renews focus on underground coal fires - Los Angeles Times

PDF) Induced polarization signature of coal seam fires

The hot, toxic, uphill battle against Colorado's underground fires, News

CPR News Archives Colorado Public Radio

Underground Coal Fires – Emerging as a global threat with significant economic, social and ecological impacts

Deadly Colorado blaze renews focus on underground coal fires

eCFR :: 30 CFR Part 75 -- Mandatory Safety Standards—Underground Coal Mines

Dangerous legacy: Tens of thousands of Coloradans live near one of the state's many underground coal-mine fires, Subscriber Content

Colorado to start mitigating underground coal mine fire near Marshall Fire ignition point in Boulder County - CBS Colorado