Pittsburgh emergency crews mounted a large hazardous materials response late Monday night after a semi‑truck overturned on the 62nd Street Bridge and spilled an estimated 150 to 200 gallons of concentrated lactic acid. The A. Duie Pyle tractor‑trailer, traveling southbound toward the city, struck a concrete barrier on the Sharpsburg side of the Senator Robert D. Fleming Bridge at about 9:30 p.m. on July 6, 2026, and flipped onto its side. Authorities shut the key commuter bridge for more than 15 hours while fire and hazmat teams worked to contain the corrosive chemical and prevent it from reaching the Allegheny River through the bridge’s drainage system.
Prepared by Emily Rhodes and reviewed by editorial team.
This incident affects your COMMUNITY and SAFETY. The 62nd Street Bridge is a key commuter route. Its closure disrupted travel plans and could have caused delays for you. The spill risked the health of the Allegheny River, a vital local resource. Check your local news for updates on similar incidents.
A truck crash spilled corrosive lactic acid, causing a major hazmat response. It's a reminder of the risks posed by hazardous materials on our roads. Worth forwarding if you know someone who uses the 62nd Street Bridge regularly.
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