Where this source supports the record
Each entry separates the article’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.
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Engineering failures · 6 December 1907Open article references →
The Monongah Mine Disaster
Monongah Nos. 6 and 8 mine portals and memorial landscape · United States
Why editors use it hereCataloged contemporary photographs of the mine, rescue scene, and affected community.
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Quick read
At 10:28 a.m.
Reviewed 26 July 2026 -
Trigger and conditions
Investigators agreed that an ignition propagated through explosive gas or suspended coal dust, but could not establish a single initiating source.
Reviewed 26 July 2026 -
Uncertainty
The official toll is 362, but higher estimates include unregistered helpers and children.
Reviewed 26 July 2026 -
Why it matters
The disaster links hidden underground risk to hidden labor.
Reviewed 26 July 2026
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Quick read