Museum or archive

Spectacular Failures: The Boston Molasses Explosion

Library of Congress

Cross-File evidence ledger

Where this source supports the record

Each entry separates the File’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.

Engineering failures · 15 January 1919
The Great Boston Molasses Flood

Former Purity Distilling tank site on Commercial Street · United States

Open File evidence →

Why editors use it here
Primary newspaper and Red Cross materials documenting the tank failure, street damage, casualties, and engineering lessons.
1. Quick read
  A steel storage tank holding about 2.3 million gallons of molasses failed in Boston’s North End, sending a fast-moving wave through streets, buildings, and an elevated railway.
  Reviewed 24 July 2026
2. Trigger and conditions
  Soon after a fresh delivery, the tank ruptured near midday.
  Reviewed 24 July 2026
3. Uncertainty
  Contemporary accounts differ on the wave’s exact maximum height and speed.
  Reviewed 24 July 2026
4. Why it matters
  The flood is remembered for its surreal material, but the historical lesson is ordinary and durable: warning signs, weak oversight, rushed construction, and an owner’s incentives can turn an industrial container into neighborhood-scale infrastructure risk.
  Reviewed 24 July 2026