NTSB Press Release

National Transportation Safety Board
Office of Public Affairs


june 5

The National Transportation Safety Board today released a third update in its continuing investigation into the May 23 bridge collapse in Mount Vernon, Washington.

NTSB investigators interviewed the driver of the pilot vehicle (pick-up truck) on Monday, June 3, in Seattle. The driver, who investigators characterized as very cooperative, described the approach to the bridge and indicated that she saw it collapse in her rearview mirror. The account of her activities in the 72 hours prior to the accident did not reveal anything unusual or of significant interest to investigators.

Investigators also examined the pilot vehicle for the first time on Monday. The vehicle was equipped with a fiberglass measuring pole mounted on the front of the pick-up truck, which was used to detect potenial vertical clearance obstructions. The pilot vehicle and pole were measured and photographed.

The NTSB is aware of reports of a second tractor-trailer combination unit on the bridge at the same time that the bridge was struck by the truck pulling the oversized load. Investigators are attempting to track down that driver to gather any additional information that may be relevant to the investigation.

All of the bridge structure components of interest to investigators have been removed from the river and are in the process of being documented. While additional witness interviews may be conducted, the NTSB has concluded its work at the bridge site.

This is an informational release only. No interviews will be conducted.

Further investigative updates will be issued as warranted.

Office of Public Affairs
490 L'Enfant Plaza, SW
Washington, DC 20594
(202) 314-6100
Peter Knudson



The National Transportation Safety Board (NTSB) is an independent federal agency charged with determining the probable cause
of transportation accidents, promoting transportation safety, and assisting victims of transportation accidents and their families.