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Government or official record

An Examination of Major Mine Disasters

U.S. Mine Safety and Health Administration

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.

  1. Engineering failures · 6 December 1907

    The Monongah Mine Disaster

    Monongah Nos. 6 and 8 mine portals and memorial landscape · United States

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    Why editors use it here

    Federal technical history with roster, time, survival, destruction, and mine-safety context.

    1. Quick read

      At 10:28 a.m.

      Reviewed 26 July 2026
    2. 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
    3. Uncertainty

      The official toll is 362, but higher estimates include unregistered helpers and children.

      Reviewed 26 July 2026
    4. Why it matters

      The disaster links hidden underground risk to hidden labor.

      Reviewed 26 July 2026