The Del Mar Bluffs Stabilization Phase 5 project is a vital part of a multi-phase effort to protect the coastal bluffs that support a heavily used segment of the Los Angeles – San Diego – San Luis Obispo (LOSSAN) rail corridor, a vital link for passenger and freight movements within San Diego County, as well as between San Diego and north of Los Angeles. Located along the scenic but geologically sensitive coastline of Del Mar, this area is prone to erosion and bluff failures, which pose serious risks to public safety and regional transportation. Phase 5 of the project focused on reinforcing the bluffs with retaining structures and drainage improvements to reduce erosion and stabilize the ground beneath the railway. The work is crucial not only for protecting the rail infrastructure but also for ensuring long-term service reliability for passenger and freight trains that serve communities from San Diego to San Luis Obispo.
As part of this stabilization effort, our surveying team provided comprehensive technical support from initial calculations to field implementation. In the office, we compiled detailed site drawings—including boundary, topographic, staking, and control data—to support accurate field layout. Our team performed precise calculations to verify existing field conditions and to guide the placement of major structural components. They also calculated and documented on-site stationing across the entire project area and identified key underground utilities, including cleanouts and pull boxes, to ensure they were protected during construction. In addition, we reviewed and interpreted field data to produce clear exhibits, providing essential documentation and verification throughout the project.
On-site, our surveyors staked all critical features, including the locations of I-beam piles, retaining walls, bore pits, and stormwater infrastructure such as underdrains and storm drains. They marked existing utility features to prevent accidental damage and ensure smooth coordination with other trades. While working in the active rail corridor, our crew adhered to strict safety protocols, maintaining constant communication with the Roadway Worker in Charge. Our team also made real-time adjustments in the field as needed, updating plans and digital data to reflect evolving site conditions.
We are proud to contribute our surveying expertise to this important stabilization project, supporting the long-term safety and reliability of one of Southern California’s most critical transportation corridors.