HARRISBURG, Pa. (NEWSnet/AP) — Gasoline spilled out from an unsecured hatch on the top of the gasoline delivery tanker that overturned and ignited underneath the Interstate 95 bridge in Philadelphia a year ago, according to new details from federal investigators.

Video evidence obtained by investigators shows the cover to the 16-inch “manhole” was open when the driver arrived at a Wilmington, Delaware, terminal to refill the tank and it was still not properly secured when he drove away to deliver it to a convenience store in Philadelphia, about 42 miles away.

The crash killed the driver and disrupted transportation along a vital interstate for weeks.

A “origin and cause” report by the Bureau of Alcohol, Tobacco, Firearms and Explosives issued in September but made public late Wednesday said the “combined opinion” of its investigators is “that the fire most likely originated when gasoline escaped” from the open manhole as the trailer overturned and nearly 2,500 gallons of mixed gasoline and ethanol began to spill out from a section of the tank and ignite.

The findings shed new light on the June 11, 2023, early morning crash that destroyed the bridge beyond repair and shut down the highly traveled north-south artery in both directions for a couple of weeks until an interim patch made of lightweight glass nuggets was in place.

A permanent bridge opened to traffic in November and the highway returned to normal operations last month.

The ATF report was included in a set of investigative materials released by the National Transportation Safety Board as it looks into the cause of the explosion. The NTSB’s final report could be a year away.

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