The Portuguese Bend Landslide Remediation Project would remove water trapped deep underground and prevent rainwater from entering the ground in the future. This would be achieved through a combination of the following project components:
- Infilling fissures in the earth to prevent rainwater from entering the ground and contributing to movement
- Creating a surface drainage system using materials reflective of the surrounding environment and planted with native vegetation to convey rainwater to the ocean and prevent it from percolating underground
- Installing hydraugers (horizontal dewatering wells) to extract water trapped deep underground
The project has been modeled to reduce land movement to 1-2 inches per year and drastically reduce the threat of sudden movement that could result in the failure of Palos Verdes Drive South, a major road connecting the Peninsula and the City of Los Angeles.
A Draft Environmental Impact Report (EIR) for the project was released in February 2023 and a Final EIR that responds to public comments is being prepared, with completion expected in fall 2024 and construction as early as fall 2025. The City was recently selected as a candidate for $23.3 million in grant funding from the Federal Emergency Management Agency (FEMA) to help slow the landslide. To complete the estimated $33 million project, the City is working to identify funding opportunities for about $10 million needed in non-federal matching funds from state and local representatives and agencies.
Read more about the Portuguese Bend Landslide Remediation Project.