Del Mar Bluffs Stabilization Project

Del Mar BluffsSANDAG stabilized portions of the 1.6 miles of coastal bluffs between Seagrove Park and Torrey Pines State Beach in the City of Del Mar. Construction was completed in February 2012. This integral part of the 128-mile Los Angeles to San Diego (LOSSAN) rail corridor provides a vital link for passenger and freight movements within San Diego County, as well as between San Diego, Los Angeles, and points further north. The North County Transit District COASTER commuter rail service, Amtrak’s Pacific Surfliner inter-city service, and BNSF Railway freight service all rely upon this segment of track to serve their customers.

The periodic stabilization of the bluffs helps preserve trackbed support to ensure uninterrupted rail service. Components of the project included drilling 36-inch diameter holes for soldier piles spaced approximately 10 feet on center and 40 to 65 feet in depth. Work involved installing steel reinforcement beams into the holes; backfilling the holes with concrete; installing tie-backs at some locations; and finishing with an architecturally enhanced pile cap.

The total cost of the project was $4.8 million. It was funded primarily from Statewide Transportation Improvement Program and FTA Grant funds.

Construction began July 25, 2011, and concluded February 2012.

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