Broken Rail Caused 2020 Tempe Train Derailment, Bridge Collapse: NTSB

TEMPE, AZ —The National Transportation Safety Board (NTSB) launched an investigative report Thursday that mentioned a damaged rail possible was the reason for the July 2020 freight prepare derailment and bridge collapse over Tempe Town Lake.

The fiery derailment concerned 12 of the prepare’s 97 automobiles and induced a partial collapse of the Salt River Union Pacific Bridge, which was inbuilt 1912. Several automobiles carrying hazardous supplies overturned, leaking chemical compounds into the world.

There had been no fatalities, although one firefighter was handled for smoke inhalation on the scene, based on the NTSB.

The NTSB’s 9-page report titled “Union Pacific Railroad Derailment with Bridge Strike and Fire”
detailed the details of the derailment — which the company gathered throughout a prolonged investigation — earlier than explaining the “probable cause ” of the incident.

“The probable cause of the Union Pacific Railroad freight train derailment and subsequent bridge collapse on July 29, 2020, was a broken rail located on the ballast deck portion of the wooden trestle approach about 30 feet from the steel bridge,” the NTSB wrote. “Contributing to the severity of the derailment was the absence of an inner guard rail preceding the steel bridge structure, which allowed the derailed equipment to move laterally into the bridge structure and cause its collapse.”

According to the report, the derailment occurred at 6:06 a.m., and the prepare was not touring too quick, remaining in compliance with the 25-mph velocity restriction on the bridge.

Five of the 12 automobiles that derailed had been tankers carrying numerous hazardous supplies. One of the tankers launched about 2,200 gallons of cyclohexanone, a flammable liquid that created a pool of hazardous materials beneath the broken bridge, the NTSB mentioned.

The report additionally mentioned that Union Pacific estimated the price of the derailment to be about $11 million, together with $485,000 for railroad gear, $435,000 for monitor and buildings and $10 million for the bridge.

Back to top button