Increasing Resilience of the San Francisco Waterfront with Engineering Innovation-PPT Presentation

PPT Presentation

Pdf Summary

The presentation describes shoreline resilience improvements for the Potrero Power Station site on San Francisco’s waterfront, an industrial site exposed to sea-level rise, strong earthquakes, variable reclaimed fill, weak Young Bay Mud, and soil contamination.<br /><br />The shoreline structures were designed for a 75-year service life through 2100. The project used a sea-level-rise allowance of 6.9 feet (2.1 m), within a broader projected range of 2.4–10.2 feet, and site-specific seismic criteria, including a peak ground acceleration of 0.46g.<br /><br />The design combines four main systems: deep soil mixing (DSM) buttresses, tie-backs anchored in DSM, a pile-supported seawall, and a pile-supported wharf. The DSM buttresses were designed to limit post-earthquake movement; the completed system’s maximum measured or calculated displacement was 2.5 inches, below the six-inch performance limit. Tie-backs anchored into the DSM provide lateral support to an existing intake structure facing substantial seismic thrust.<br /><br />The approximately 260-foot seawall is supported on piles to reduce settlement and includes a shear key for added seismic resistance. The wharf uses upper and lower levels: the upper level aligns with the raised grade for sea-level-rise adaptation, while the lower level supports access to a future floating recreational dock. Because DSM installation was limited to areas above mean high water, piles also contribute to shoreline stability. The wharf was designed for life-safety performance under applicable seismic guidance.

Keywords

Potrero Power Station

shoreline resilience

sea-level rise

deep soil mixing

seismic design

pile-supported seawall

tie-backs

wharf structure

reclaimed fill

Young Bay Mud