CONFIRMED89% CONFIDENCEHappened as dated, per the source[1]: the pile-driving and load-shifting project "was finished earlier this month," in an article published June 21, 2023.
- Start
- Jun 21, 202390% CONFIDENCEfrom the source
San Francisco's Millennium Tower Fix Declared a Success
Engineers completed a $100M underpinning project meant to arrest the sinking and tilt of San Francisco's Millennium Tower.
- A $100 million foundation upgrade of the Millennium Tower (301 Mission St., San Francisco) was substantially completed in June 2023, with 18 concrete piles driven to bedrock[2][3]
- Load transfer to the piles finished on 19 June 2023; survey data showed settlement 'has indeed been arrested' and the building 'has risen slightly', per engineer Ron Hamburger[2]
- The building tilted about 30 inches northwest over 15 years, and 7 inches of tilt occurred during the work[2]
- The fix is a scaled-down version of an original 52-pile plan whose initial pile driving caused extra settlement and a pause in 2021[2][3]
- Piles are socketed over 30 ft into rock 220 ft below grade; the HOA settled with the developer in 2020 and the tower stays under a 10-year monitoring plan[2][3]
Cost $100M
References 389% CONFIDENCE
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]90%youtube.com/watch?v=q56dRLI0X7Yyoutube.com· Posted Sep 15, 2026· Starts Jun 21, 2023 ✓· 90% of score
Happened as dated, per the source: the pile-driving and load-shifting project "was finished earlier this month," in an article published June 21, 2023.
- [2]80%After 15 Years, Settlement Arrested at San Francisco's Millennium Towerenr.com· Published Feb 1, 2025· 9% of score
- [3]82%San Francisco's Infamous Leaning Tower Has Been Fixedsfstandard.com· Published Jun 21, 2023· 1% of score
Suggest a correction
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.