Fugro completed a geotechnical site characterization, earthquake hazard, and geotechnical vulnerability assessment for the Port of San Francisco’s multi-year, multi-billion dollar Waterfront Resilience Program. The work was carried out over a period of 3 years as part of a multi-hazard risk assessment (MHRA) in order to identify immediate and long-term hazards, e.g. B. in connection with earthquakes, floods and sea level rise. As the port’s lead geotechnical engineer for future program phases, Fugro will use the MHRA inputs to develop and design optimal retrofit solutions for the port’s aging dam.

The three-mile-long dam was built more than 100 years ago and forms the foundation of San Francisco’s Northeast Waterfront, which is home to a critical mix of open spaces, tourist attractions, businesses, utilities, civil protection facilities, transportation networks, and state and regional maritime goods. The age of the dam and its proximity to two major active faults make the waterfront particularly vulnerable to earthquakes and flooding.

Fugro’s approach to MHRA emphasized two main goals: reducing the uncertainty of soil conditions for improved safety and minimizing possible over-development of retrofit solutions for sea walls for maximum cost efficiency. These goals were achieved through a targeted, high quality geotechnical field campaign, the development of a robust 3D soil model and the use of innovative dynamic soil structure interaction analysis to safely assess the seismic stability of the dam. The result was a reliable, rather than conservative, vulnerability assessment that enables the port to make informed financing decisions for retrofitting construction and construction.

Thaleia Travasarou, Consulting Manager for Fugro in America, said, “The MHRA has been a huge undertaking and Fugro is pleased to have provided our geospatial data and expertise that will aid future resilience decisions. We are very pleased to continue our work with the port in the next program phases and to contribute to securing the city’s coastal infrastructure for safe and sustainable operation in the long term. “