As part of the Unified Command response to the collapse of the Francis Scott Key Bridge, the US Army Corps of Engineers and US Navy Supervisor of Salvage and Diving, on 10 June, restored the Fort McHenry Federal Channel to its original operational dimensions of 700 feet wide and 50 feet deep for commercial maritime transit through the Port of Baltimore.

Following the removal of wreckage at the 50-foot mud-line, the Unified Command performed a survey of the Federal Channel, certifying the riverbed as safe for transit. Fully restoring the Federal Channel to its original width and depth involved the removal of about 50,000 tons of bridge wreckage from the Patapsco River. At its highest point, the Unified Command, consisting of six agencies, led the response efforts among about 56 federal, state, and local agencies, represented by 1,587 individual responders. Additionally, about 500 specialists from around the world operated a fleet of 18 barges, 22 tugboats, 13 floating cranes, 10 excavators, and four survey boats. Subject matter experts from all over the US also provided essential technical knowledge to the Unified Command.

Above: The Chesapeake 1000 ('Chessy') floating crane, equipped with 'Gus' the hydraulic grabber, wrestles a 90-ton piece of residual wreckage on Friday morning, 7 June 2024, from the Fort McHenry Federal Channel. Taking roughly 45 minutes to unfold, Chessy and Gus slowly lift the mangled steel high above the Patapsco River, so a waiting barge can move underneath, allowing the wreckage to be safely lowered onto the barge for immediate processing by waiting hydraulic sheers (US Army photo by Bobby Petty).

Above: Detonation of the 312lbs of explosives at 52 locations on the fallen Francis Scott Key Bridge truss which pinned the MV Dali to the bottom of the Patapsco River (CDI).

Additional background information

The Terrorism Risk Assessment, Modelling and Mitigation Seminar Series (TRAMMSS) is a virtual seminar series focused on technical topics related to terrorism risk assessment, and modelling, including blast modelling and response; IEDs; vehicles as weapons; CBRN; big data for risk assessment, security and screening; and associated mitigation measures.

Speakers

Colonel Robert McTighe (US Army Corps of Engineers North Atlantic Division)

Mark Loizeaux (Controlled Demolition Incorporated)

Who should attend

This seminar is open to guests from outside Cranfield, who may work in academia, research, or industry. Due to the potentially sensitive nature of this seminar series, guests should be able to show that they are affiliated with an appropriate bona fide organisation.

Cost

The event is free of charge, but participants must register for the TRAMMSS mailing list in advance.

How to register

To attend this seminar, you must register for the TRAMMSS mailing list via the form.

Questions for the seminar can be pre-submitted here.

Further information on the TRAMMSS community can be found on the main website at cranfield.ac.uk/TRAMMSS.