Bay Area Rapid Transit Earthquake Safety Program
San Francisco, California
HNTB performed project PM and designed seismic retrofit of existing aerial infrastructures prepares system for major earthquake
• Developed innovative retrofit solutions
• Minimized traffic and service disruptions which delivered additional value
• Delivered public outreach campaign encompassing environmental, design and construction phases
HNTB provided project management, preliminary and final engineering design services, public outreach and design support during construction for BART's $1.3 billion Earthquake Safety Program to protect public safety and BART's substantial capital investment. HNTB established criteria for the analysis, evaluation, performance and design of the nearly 25 miles of aerial guideway structures.
The retrofit designs of the BART aerial structures had to overcome a number of complex challenges, including near-field ground motions from the San Andreas and Hayward faults, crossing two other active faults, deep bay mud, soil liquefaction, large variations in structure types, constrained construction areas and operational and safety considerations of the active BART system. HNTB also provided design support services during the environmental clearance activities and led the value analysis study efforts for the program.