The Key Bridge Mayday — Ninety Seconds on March 26, 2024

The container ship Dali lost electrical power at 1:24:59 a.m. on March 26, 2024, about 3,200 feet from the Francis Scott Key Bridge in Baltimore. The main engine shut down nine seconds later. Power came back, failed again at 1:27:04, and came back again at 1:27:36. In between, at about 1:27, the pilot issued a mayday: propulsion lost, collision with the bridge possible. Maryland Transportation Authority police dispatch ordered traffic stopped at 1:27:53. Officers near the bridge halted eastbound traffic within about 20 seconds and westbound traffic by 1:28:58. At 1:28:45 the ship struck a support pier at about 8 knots, and the span fell into the Patapsco River.

One officer had radioed that he would drive onto the bridge to alert the construction crew working mid-span once backup arrived. The bridge fell first. On the dispatch audio, another officer: 'The whole bridge just fell down.'

The Work Crew and the Drivers

Six men received no warning. They were road workers employed by Brawner Builders, filling potholes on the span: Maynor Yassir Suazo Sandoval, 38, who had come from Honduras; Miguel Angel Luna Gonzalez, 49; José Mynor López, 37; a 35-year-old man from Mexico; a 26-year-old man from Guatemala; and a sixth man whose name was not made public. All six died in the collapse. The last of them was recovered from the river on May 7, six weeks after the bridge fell. Two other people survived: one man pulled from the water seriously injured, and an inspector rescued unhurt from a standing section.

Officers had halted traffic at both ends in the minutes before the strike. The bridge carried more than 30,000 vehicles a day, and cars were crossing it less than two minutes before the collapse. Governor Wes Moore said of the responders: 'These people are heroes. They saved lives last night.'

What the Investigation Found

The National Transportation Safety Board adopted its final report on November 18, 2025. The probable cause was a single loose signal wire: wire-label banding had prevented the wire from being fully seated in a terminal-block spring-clamp gate, and the bad connection opened a breaker that began the blackout sequence. The ship's high-voltage breakers were also set to manual rather than automatic mode, which stretched the first blackout from a possible 10 seconds to 58. 'This was preventable,' said NTSB Chairwoman Jennifer Homendy. The same report credits the human chain precisely: 'quick actions of the Dali pilots, shoreside dispatchers and the Maryland Transportation Authority to stop bridge traffic prevented greater loss of life.'

Assessment

We put the more-than-coincidence probability at 5 percent. Read element by element, the saving conjunction is a designed system doing what it was designed to do. Maydays are protocol. Dispatchers relay. Officers sat near a major crossing because patrol patterns put them there. The hour of night, not any arrangement, set the traffic density. What remains is the width of the window: a blackout slightly closer to the bridge leaves no warning at all, and slightly farther out the ship may have recovered or anchored. Ninety seconds happened to be exactly enough for the cars. It was not enough for the men on the span, and the record states why without any mystery: the chain that could stop traffic at the ends of the bridge had no channel that reached the workers in its middle. The NTSB's two findings stand side by side and have to be read together — the response prevented greater loss of life, and the event that demanded the response should never have happened.