Rail & Transit Projects
Foothill Gold Line Extension, Phase 2A

Phase 2A of the Foothill Gold Line Extension project connects the terminus of the existing Metro’s Gold Line Phase 1 at Sierra Madre Villa Station, and adds 11.5 miles of track to complete the Pasadena to Azusa alignment. The project also includes 6 stations, 14 bridges, 5 miles of retaining walls and sound walls, a 25-acre maintenance facility, as well as utilities and crossings.

EMI undertook a field investigation program tailored to the proposed improvements along the project alignment, which included over 200 geotechnical borings and cone penetration soundings. EMI evaluated the geologic and seismic hazards along the project alignment. For seismic design, site-specific response spectra were developed for three-level ground motions in accordance with the Metro Supplemental Seismic Design Criteria and AREMA requirements.

EMI provided site-specific geotechnical recommendations for earthwork, corrosion protection, suitable foundation types, vertical and lateral geotechnical resistances in accordance with the Load and Resistant Factor Design (LRFD) method for foundation engineering, and construction considerations.