Satellite images show extent of damage to Baltimore bridge, experts explain why
At about 1.30 am on Tuesday, the Francis Scott Key Bridge, across the Patapsco River in Baltimore, Maryland, collapsed after a 985-foot-long cargo vessel called the Dali reportedly lost power and hit the bridge’s pylon or pier. "The collapse occurred when a ship collided with one of the bridge piers, leading to the failure of the metallic truss. "The collapse of the bridge's 804-metre-long three-span section appears to have been caused by the massive container cargo vessel DALI impacting and demolishing one of the two main bridge piers. Referring to the era when the bridge was built, structural engineer Ian Firth said: "Dolphins have been commonplace since the Sunshine Skyway collapse in 1980. "When the steel truss road bridge was designed and built in the 1970s, there likely wasn't a requirement to consider disproportionate collapse and structural integrity.
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Ship that caused bridge collapse had electrical issues while still docked, AP source says