When the project is finished, the excavation team will have moved 182,000 cubic yards of material, which is about 72,000 pickup-truck loads of coal, rock and dirt.

It turns out they’ve also been stomping on a smoldering, 100-year-old coal fire, three stories underground — and a source of sparks that have ignited wildfires above ground.

Crews have begun a long-awaited project to extinguish a coal seam fire that has been burning underground on Marshall Mesa, south of Boulder, Colorado, for over a century.. The fire, a remnant of ...

Work underway to douse potential fires from former coal mines in Colorado 03:43. Heavy equipment is now at work at the Marshall Mesa Trailhead in Boulder County, digging and tossing and mixing and ...

Underground coal fire burning near Boulder for 100 years is now out by: Ashley Michels. Posted: Jan 14, 2025 / 04:08 PM MST. Updated: Jan 14, 2025 / 09:57 PM MST. by: Ashley Michels.