Langan Helps the Golden State Warriors Get Out of the Ground on Mission Bay
Lori Simpson and Dorinda Shipman make a great backcourt combo … for geotechnical and environmental engineering, that is. Those were the main technical services that Langan provided on Chase Center, which officially opened on September 6 with a performance by Metallica and the San Francisco Symphony; and tonight is the home opener for the Golden State Warriors (aka the “Dubs”)!
The state-of-the-art 18,000 seat Chase Center includes a view deck and two public plazas, 580,000 square feet of office space, retail, restaurants, and underground parking. Langan’s vast knowledge of the unique subsurface challenges of Mission Bay allowed for out-of-the-box ideas on foundations, cutoff walls, soil treatment, and dewatering system design.
Beneath Chase Center’s foundation, conditions vary significantly, with bedrock as shallow as 30 feet and as deep as 130 feet. Such extreme variation meant that total length of piles to bedrock needed to be identified on a case-by-case basis during construction. A combination of large-diameter drilled shafts and augered cast-in-place piles were used for foundation support. The support of excavation system required a laterally restrained deep soil mixed cutoff wall along the entire perimeter.
Langan’s environmental team prepared required reports and mitigation and monitoring plans; modeled groundwater for design and dewatering during construction; obtained permits for groundwater treatment and discharge; monitored dust and asbestos in air; and provided construction observation services for hazardous materials and soil management.
“The transformation of Mission Bay has been remarkable, and while every project has been rewarding, Chase Center, for obvious reasons, was particularly exciting,” said Lori Simpson, Principal, Langan. “Dorinda’s environmental team and my geotechnical team collaborated seamlessly on this successful project, and we look forward to watching the Warriors play in their new home for many seasons to come.”