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Explosion at Allegheny Arsenal

When
1862-09-17
Where
Lawrenceville
Part of
Allegheny Arsenal explosion kills 78 workers in Pittsburgh

On September 17, 1862, an explosion killed 78 workers, mostly young women, at the Allegheny Arsenal in Lawrenceville.

The blast occurred around 2 pm. The most common view is that a horse's metal shoe struck a spark, igniting loose powder near the lab. Symington speculated leaking barrels caused it, a point of agreement among witnesses. The event was overshadowed by the Battle of Antietam.

Sources

  1. Allegheny Arsenal Wikipedia, revision of 2026-07-17

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.