Offshore Platform
Matterhorn platform — riser-guard structural failure
9 April 2026 · 08:00 local time
Mississippi Canyon, Gulf of Mexico, United States
What happened
A riser guard detached from three supports on W&T Energy's Matterhorn tension-leg platform after fatigue cracking developed in the corrosive offshore environment. The protected risers were shut in and all personnel demobilized as a precaution. There were no injuries or pollution; BSEE estimated damage at $2 million. The guard was recovered and gas-pipeline isolation was reversed during work completed through 16 April. The marker is approximate.
When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.
- Evidence
- Documented
- Confidence
- High
- Infrastructure
- Offshore Platform
- Latitude
- 28.7500°
- Longitude
- -89.1000°
Attribution
Responsibility has not been established in the cited reporting.