In March, the San Diego Association of Governments is set to begin Del Mar Bluffs Stabilization 4, a $5.8 million construction program to shore up the fragile bluffs and improve drainage along the railway between 15th Street and Carmel Valley Road.
On the beach at 13th Street, a "headwall" for a storm drain pipes is scheduled for replacement. At 11th Street, support beams for a seawall will be replaced, and new concrete will be poured to strengthen the storm drain outfall at 11th Street.
East of the railroad tracks, at 10th Street, a timber wall that supports a drainage channel will be lengthened and repaired. The open drainage channel between 6th and 8th streets will be replaced.
A second, related program, the Del Mar Bluffs Emergency Project at 14th and 15th streets, included the installation of 230 pilings and concrete retaining walls and drainage fixes after torrential rains in November 2019.
During a Feb. 3 presentation to the City Council, SANDAG officials said a future project, Phase 5, would include more pilings and drainage structures at a cost of $24 million. Phase 6 envisions continued bluff retreat and sea level rise and the need for continued construction estimated at up to $70 million.
Meanwhile, the transportation agency is exploring alternative alignments that would send the railroad tracks into a tunnel beneath Del Mar.
Open SANDAG’s Feb. 3 bluff stabilization update (PDF).