Over the past several months, workers have been drilling three-foot-wide holes along the Fremont Street side where the new pilings will go, and NBC Bay Area reports that construction documents suggest that these construction activities have led to the accelerated settlement of the building. The reason for the pause is that the 58-story tower had sunk a full inch since the new digging began in May and tilted an extra five inches toward Fremont Street, for a total of 22 inches of tilt at the top.Īs NBC Bay Area reports, the exact cause of the accelerated sinking has not been announced, but it is clearly well beyond the expected rate set by engineers of one inch per year, or 5.25 inches total by mid-2026.Īnd it's logical to surmise that digging around the building's foundation has caused it to sink faster. We learned last week that the $100 million project to dig down to bedrock and add new concrete pilings around Millennium Tower - which will in turn be attached to the building's existing foundations and ultimately stop it from sinking and tilting - had been halted. The effort to shore up the foundation of Millennium Tower in downtown San Francisco, which began in May, may be contributing to an accelerated rate of settlement that engineers are observing, causing alarm.
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