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Committee backs $7M amendment to SFPUC engineering contract to advance Moccasin and O'Shaughnessy work

San Francisco Board of Supervisors Budget and Finance Committee · December 10, 2025
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Summary

SFPUC requested a $7 million amendment to its PRO-138B engineering contract with GEI Consultants to assume design work on Moccasin Dam and O'Shaughnessy Phase 2 previously managed by HDR; the committee forwarded the item 3-0 after BLA recommendation and discussion of a larger capital plan increase.

The Budget and Finance Committee voted Dec. 10 to forward to the full Board a resolution authorizing SFPUC to amend Contract PRO-138B, adding $7 million so the contract's not-to-exceed total will be $18 million. Carmen Ng, a civil engineer in SFPUC's engineering management bureau, said the amendment shifts Moccasin Dam and O'Shaughnessy Dam Phase 2 engineering to GEI Consultants to avoid a conflict of interest with HDR, which now serves as water enterprise capital program manager.

Ng outlined the projects' history: assessments following the Oroville Dam 2017 spillway failure led to expanded scope and higher budgets; SFPUC's 10-year capital plan for dam and reservoir work increased from an earlier ~$213.1 million for assessments to roughly $626.7 million as scopes became clearer. The Moccasin Lower Dam suffered significant spillway damage in 2018; SFPUC staff described proposed engineering solutions including a side-channel auxiliary spillway and energy-dissipation basin now at roughly 35% design.

Nick Menard of the Budget and Legislative Analyst's office recommended approval and noted the amendment reallocates projects that HDR can no longer design because of its program-manager role. With no public commenters, the committee voted to forward the amendment with positive recommendation (3-0). The item will appear on the Board agenda for further consideration.