The deadliest disaster in Washington County, Pennsylvania history, it prompted creation of the US Bureau of Mines in 1910 and lasting mine safety reforms.
Key Facts
- Deaths
- 154 miners killed
- Survivors
- 1
- Date
- November 28, 1908
- Location
- Marianna, Washington County, Pennsylvania
- Legislative outcome
- US Bureau of Mines established 1910
- Commemorative marker erected
- 2019
By the Numbers
Location
Cause → Event → Consequence
Coal mining in early twentieth-century Pennsylvania carried severe risks from explosive mine gases and coal dust, with inadequate safety regulations and blasting practices leaving workers highly vulnerable to catastrophic underground explosions.
On November 28, 1908, an explosion tore through the Marianna coal mine in Marianna, Pennsylvania, killing 154 miners. Only one person survived, making it the worst disaster in Washington County history.
The Marianna disaster, alongside other contemporary mine accidents, galvanized public demand for federal oversight. Congress established the US Bureau of Mines in 1910, which conducted research on safer blasting materials and gas and dust explosion prevention, reducing the frequency of mine disasters.