Engineers Remove Dangerous Masts from WWII Explosives Shipwreck
Specialists have successfully removed unstable masts from the SS Richard Montgomery, a WWII wreck holding 1,500 tons of explosives near London.
POLICY WIRE — Sheerness, England — A high-stakes engineering project to stabilize a World War II shipwreck laden with 1,500 tons of explosives has concluded, successfully mitigating the immediate threat of a catastrophic detonation near London.
The SS Richard Montgomery, a U.S. Liberty ship, ran aground on a sandbar in the Thames Estuary in August 1944 while transporting munitions for the Allied war effort. The vessel eventually broke apart and sank just 40 miles from the British capital, leaving its volatile cargo resting on the riverbed.
For decades, the ship’s three masts remained visible above the water, but recent structural decay sparked fears that they could collapse onto the cargo. Experts warned that such an impact could trigger the ship’s fused munitions, potentially causing a massive explosion.
U.K. maritime minister Keir Mather confirmed to the House of Commons that the complex removal project was finished ahead of schedule and within its budget of just under $13 million. Mather noted that removing the masts significantly reduces the structural load on the wreck, aiding in the long-term safety of the site.
To perform the delicate extraction, engineers utilized a remotely operated diamond-wire saw that clamped onto the masts with hydraulic arms, avoiding the need for divers. A custom lifting frame was also designed to ensure the masts were removed without vibrating or swaying against the fragile hull.
Despite the successful removal of the masts, the bulk of the explosives remains trapped within the rusting wreck. The government maintains a strict 1.5-mile exclusion zone around the site, which will continue to be monitored closely by authorities.
The potential consequences of a detonation remain a subject of expert debate, with scenarios ranging from minor shipping channel closures to a tidal wave impacting the shoreline. While officials currently categorize the risk of an explosion as low, the site remains a permanent fixture of the estuary.
The salvaged masts have been relocated to the Historic Dockyard Chatham for public display, honoring the vessel’s role in World War II. Although the ship is now hidden from view, the SS Richard Montgomery remains a dangerous, enduring relic of the conflict.
Reporting by Policy-Wire (PW)
