The City of San Diego's Public Works Department held an Oct. 16 morning ceremony marking the completion of a road stabilization project to shore up a sea cave thwarting a potential collapse of Coast Boulevard in La Jolla.
The $3.2-million emergency project began in August to reinforce a section of Coast Boulevard above a sea cave known as Koch's Crack Sea Cave, also known as Cook’s Cave.
Construction workers injected polymer-based grout below the street to stabilize the soil and poured approximately 2,000 cubic yards of concrete slurry to reinforce the cave.
The sea cave underneath Coast Boulevard was plugged to remove the water and then filled from above with a sand/slurry concrete mix to help protect the road above, which contains a water main, a sewer main and a storm drain main.
The project was initially anticipated to be completed in November.
Bluff collapses along the San Diego coastline in recent months have caused three deaths, prompted warnings for beachgoers, and caused cities to allocate time and money toward making coastal bluff safety improvements.