Proposed 400,000-square-foot, 18-story tower underlain by two-levels below grade parking 

Demolition of existing structures 

Renovations and seismic upgrades of adjacent historic buildings 

Densely developed area adjacent to historic structures and BART subway tunnel 

Complex 3-dimensional below grade geometry (adjacent foundations, subway tunnel, and underground utilities) 

Deep bedrock (155+ feet deep)

Robust laboratory testing and engineering analyses performed to evaluate liquefaction and settlement potential 

Plaxis analysis involving multiple foundation and ground improvement scenarios to check and value engineer settlement performance 

Foundation alternative analyses including evaluations of deep foundations to bedrock, deep foundations to alluvium, mat foundation with deep rigid inclusions