Treasure Island / Yerba Buena Island Redevelopment


Treasure Island Community Development (TICD)


San Francisco, CA

Project Overview

ENGEO is the Geotechnical Engineer of Record.

The project provides a new, high-density, mixed-use community with a variety of housing types, a retail core, open space and recreation opportunities, on-site infrastructure, and public and community facilities and services.

Engeo's Role

In 2014, 2015, and 2016 ENGEO conducted the design-level geotechnical study for the first Major Phase of development, an approximately 171-acre parcel with a new ferry terminal, approximately 3,700 residential units, and 100 acres of parks and open space.

At Yerba Buena Island, the geotechnical considerations and design features include: slope and foundation design issues associated with existing cut slopes and hillside fills; stability of existing retaining walls; slope stability issues associated with the steep perimeter slopes; slope stability issues associated with the slopes under and adjacent to the Treasure Island Road Viaduct.


The main geotechnical challenges at the site included:
(1) seismic stabilization of the perimeter shoreline and causeway that connect Treasure Island to Yerba Buena Island,
(2) mitigation of long-term static settlements under the development footprint due to the presence of Bay Mud, and
(3) mitigation of liquefaction-induced settlement within the development footprint.

Solution and Outcome


ENGEO designed and managed a large scale ground improvement test section, high-end cyclic testing on the soils and finite element dynamic analyses to demonstrate that a proprietary ground improvement technique would stabilize and mitigate liquefaction-induced lateral spread, thereby making high-rise development feasible, and saving millions and years of construction in the process. 

    • Optimization of liquefaction hazard and lateral deformation through robust field explorations, state-of-the-art laboratory analyses, and advanced numerical modeling   
    • Mitigation of seismically induced liquefaction within the development footprint utilizing direct power compaction  
    • Utilization of state-of-the-art non-ergodic seismic hazard analysis for ground-motion optimization for vertical developments   
    • Implementation of 2- and 3-dimensional finite-element modeling to evaluate static and seismic soil-structure interaction  
    • Installation of an extensive instrumentation program to monitor the performance existing buildings potentially impacted by the geotechnical mitigation program

Our fantastic people set us apart

Meet our people
Contact Us

Explore how we can best serve you.