Cheniere LNG Subsidence Monitoring

AWC provided surveying services for subsidence monitoring at the Cheniere LNG Facility in Cameron Parish, Louisiana. With settlement concerns affecting the plant’s structural stability, AWC established a long-term monitoring system over a three-year period to track ground movement and inform preventative measures. Approximately 675 custom-fabricated brass benchmark monuments were installed at designated locations throughout the facility, each securely placed with cement or epoxy and precisely labeled for identification. Using high-accuracy leveling techniques, AWC recorded horizontal and vertical positions based on Cheniere’s plant datum, creating a reliable baseline for future monitoring. Follow-up surveys were conducted to measure elevation changes over time, providing Cheniere with a clear picture of differential settlement across the site and enabling timely interventions and infrastructure adjustments as needed.