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Millennium Tower upgrade: engineers report pilot casing methods reduced ground loss; DBI, EDRT and HOA seek more tests

San Francisco Board of Supervisors, Government Audit & Oversight Committee · November 4, 2021
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

At a Board committee hearing, the Millennium Tower homeowners' team and design review experts described a voluntary perimeter pile upgrade; engineers said early casing/pile work coincided with a small increase in settlement, improved pilot methods reduced ground loss, and DBI/EDRT set monitoring thresholds and asked for further 24" pile testing before resuming broader work.

Supervisor Aaron Peskin convened a hearing on Nov. 4, 2021 to receive progress updates on the voluntary perimeter pile upgrade (PPU) for 301 Mission (Millennium Tower). The homeowners association, lead design engineers and contractor described the retrofit plan — installing perimeter piles tied into a mat extension to transfer loads to bedrock — and reviewed the monitoring and recent construction experience.

Charles Litt, counsel for the HOA, summarized the…

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