The National Transportation Safety Board (NTSB) has concluded its investigation into the grounding of the barge Cordova Provider in Prince William Sound, which was declared a total loss. Originally an ice-class oil recovery barge, it was modified in 2005 to operate as part of an articulated tug-barge (ATB) system with the tug Krystal Sea. This unique setup utilized a wedge-and-recess connection instead of traditional coupler pins, relying on breast lines to maintain the tug’s position.
On January 10, 2025, the Krystal Sea/Cordova Provider departed Valdez amid forecasts of 45-knot winds and rising seas. After a swift stop in Cordova, the ATB faced 4-6 foot seas as it crossed the sound. At 0250, all four Dyneema lines connecting the tug and barge snapped, leaving the Cordova Provider adrift. Attempts by the nearby escort tug Latouche to secure the barge failed, leading to its grounding on rocks off Axel Lind Island, causing extensive damage and partial sinking.
Investigators focused on the Dyneema lines, which had been recently switched from steel wire rope. Although inspected days prior and found in good condition, the NTSB determined that the lines likely failed due to shock loading, with the exact cause of the breakage during this trip remaining unclear.