When completed in late 2008, this $350 million mixed-use condominium project will be the 4th tallest structure in the city and the tallest reinforced concrete structure in the Western United States. The building contains a 60-story residential tower and an adjacent 12-story residential structure connected by a 3-level podium structure. The 645-ft high tower contains 970,000 sf of luxury condominiums. The adjacent building contains 180,000 sf of one bedroom condominiums and recreational amenities including a swimming pool. Four levels of parking are provided below grade, requiring a 75-ft-deep excavation, one of the deepest in San Francisco. The tower’s foundation mat rests on 950 130-ton piles, each approximately 80 ft in length. Construction of the taller tower began first, followed by the deeper foundation work below the shorter tower. This sequencing was designed to allow for the two towers to be completed at approximately the same time. The subterranean levels utilize an internally braced soil cement slurry wall system with soldier piles located 5’ on center. The tower’s lateral system is comprised of a 24-inch-thick concrete shear wall core and a partial perimeter moment frame. Outrigger trusses are provided at three intermediate levels to control lateral deflections. Dynamic time history analyses, site-specific response spectra analyses and non-linear pushover analyses were being performed in support of the building design.