Visualizing the Baltimore Key Bridge collapse

In the early hours of Tuesday, a 984-foot container ship collided with a pillar of the Francis Scott Key Bridge in Baltimore, Maryland, causing the bridge to collapse. Six people are presumed dead. 

Ship traffic through the Port of Baltimore — the 17th largest US port by total tonnage, or total weight of cargo entering and leaving the port, and fourth largest in the East Coast, according to 2021 data from the Bureau of Transportation — was suspended until further notice. 

 Hundreds of large cargo and tanker ships pass under the bridge as they travel to and from the Port of Baltimore each month, and they typically pass through the same narrow channel under the bridge, according to a CNN analysis of shipping data released by the Bureau of Ocean Energy Management and the National Oceanic and Atmospheric Administration.

The Dali appeared to be following the same pattern but clearly diverged moments before the collision with the bridge, causing the collapse, the records show. 

The ninth largest US port for international cargo is blocked by the remains of the bridge. Ships are still able to move through the Port of Baltimore — which handled $80.8 billion worth of foreign cargo in 2023, according to the state government — but larger cargo items will have to wait until the bridge debris is cleared, Mark Conway, councilman for Baltimore’s 4th District, said on Wednesday.