The work to cool a smoldering underground coal mine in Boulder County is complete. National anthem at Trump's inauguration TikTok announces restoration of service in the US The greatest movie ...

The Marshall Mesa Trailhead was closed from Dec. 20, 2021, to Feb. 18, 2022, as the wildfire’s cause was investigated. Boulder County District Attorney Michael Dougherty said the underground ...

Mitigation work to address coal smoldering underground at Marshall Mesa Trailhead complete 00:28 Officials from the Division of Mining Reclamation and Safety say extensive mitigation efforts in ...

Mining activity ceased at the site in the early 1900’s, but the coal still left in the ground has been burning ever since.

The Marshall Mesa Trailhead site in Boulder has been fully excavated with work still needed to be done on backfilling and grading, according to a Facebook post from the Colorado Division of ...

Officials from the Division of Mining Reclamation and Safety say the mitigation efforts in Colorado to address burning and smoldering coal beneath the Marshall Mesa Trailhead have been completed.

Underneath the present-day Marshall Mesa trailhead lies one of 14,000 abandoned mines across Colorado. Mining activity ceased at the site in the early 1900’s, but the coal still left in the ...

Poofs of smoke and coal ash wafted from a 30-foot pit on Marshall Mesa as an excavator the size of a small house scooped dirt and coal out of the ground. The excavator broke chunks of coal from an ...