Coastal Bluff Stabilization
Point Loma Wastewater Treatment Plant Shoreline Protection
San Diego, California
Shoreline protection for the Point Loma Wastewater Treatment Plant featuring 125 tiebacks, a reinforced earth wall, and 1,000 yards of decorative shotcrete carved to match the natural coastal bluffs.
The Problem
Site Conditions That Drove the Work
The Point Loma Wastewater Treatment Plant, owned and operated by the City of San Diego, had experienced ongoing coastal erosion since its original construction in 1963. By 1984, stone revetments had been placed at the base of approximately 50 percent of the bluffs supporting the site. As erosion continued to encroach upon improvements at the plant, the City determined it was necessary to upgrade the coastal protection to mitigate further erosion and disruption caused by wave damage.
The Solution
J.C. Baldwin was retained as the general engineering contractor to construct the shoreline protection system, which included 125 tiebacks at 90 feet long, a 150-foot-long reinforced earth wall, and approximately 1,000 yards of 5,000 PSI decorative shotcrete carved and colored to match the existing coastal bluffs.
Outcome
The project received both the 1992 Outstanding Project Award from the California Geotechnical Engineers Association and the 1992 Outstanding Civil Engineering Project Award from the ASCE San Diego Section.
Client
City of San Diego, Water Utilities Department
Tiebacks
125 at 90 ft long
Earth Wall
150 ft long
Shotcrete
~1,000 yards, 5,000 PSI
Completed
1992
Cost
$3,300,000
Recognition
1992 CGEA OPA and ASCE Outstanding Project Awards
Project Gallery
Problem, Solution, and Site Conditions in the Field
Related Services
Capabilities Behind This Project
The Point Loma shoreline protection combined J.C. Baldwin's coastal bluff stabilization and seawall construction services to defend the treatment plant from ongoing coastal erosion with a finish that matches the surrounding natural bluffs. Learn more about the services involved in Point Loma Wastewater Treatment Plant Shoreline Protection: