The Golden State Warriors will soon be passing, dribbling and dunking in a brand new San Francisco arena—and it’s safe to say they’ll have a home court advantage.
Chase Center, which is expected to open in time for the 2019-2020 NBA season, will be a state-of-the-art arena and event space on an 11-acre site in San Francisco’s Mission Bay neighborhood. In addition to the 18,000-seat multi-purpose arena, the facility will also feature two office buildings, 100,000 square feet of mixed-use and retail space, and underground parking. More than three acres—30 percent of the site—will be plazas, landscaping and other public spaces.
GBI was contracted by Mortenson/Clark, a joint venture between Clark Construction Group and Mortenson Construction, to perform work on the $1 billion venue. The official groundbreaking ceremony took place on January 17, 2017. The project schedule was condensed, which required our team to work day and night through a particularly wet winter with minimal shutdowns. Since January, GBI has completed surface demolition and clearing; mass excavation; the off-haul of 160,000 tons of Class 1 non-RCRA hazardous soil (which was loaded into containers and transported by rail to a Class 1 disposal facility in Utah); subgrade stabilization; dewatering and water treatment; and the installation of a stormwater pollution prevention plan.
The project site is located in close proximity to the San Francisco Bay, and with the excavation extending to nearly 30 feet below sea level, groundwater and unstable soil conditions presented a number of challenges. GBI deftly implemented dewatering systems and created cement-treated temporary haul roads so trucks could safely access the site.
Parts of the project site sit on a landfill that once held rubble from the 1906 earthquake and subsequent fire that destroyed most of downtown San Francisco. As a result, soil conditions varied from native bay muds to Class 1 hazardous material, and diligent soils management was critical to prevent cross-contamination.
Chase Center is now rapidly taking shape and basketball fans are eagerly awaiting the first tip off in the Golden State Warriors’ new home.