Delve Underground Mountain Tunnel Contract Amended

San Francisco is considering a $2 million amendment with Jacobs Associates, Inc., dba Delve Underground, for specialized engineering services during construction of the Mountain Tunnel Improvements Project. The amendment would raise the contract ceiling to $30.78 million while keeping the term through February 14, 2029.

Document date · October 4, 2026

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Scope & details

The full contract record, as filed.

Contract amount

New total not to exceed $30,780,000; increase of $2,000,000

Contract type

PROFESSIONAL_SERVICES

Contract term

February 15, 2016 – February 14, 2029

Renewal date

2029-02-14

Renewal

Amendment No. 2; no change to the contract duration.

Document type

Agenda

Source document

City and County of San Francisco Board of Supervisors Agenda 2026-10-06

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Frequently asked questions

Common questions about this contract, answered from the record.

Who was awarded the professional services contract by San Francisco County?

Jacobs Associates Inc Dba Delve Underground was awarded this professional services contract by San Francisco County, as recorded on October 4, 2026. The contract value is New total not to exceed $30,780,000; increase of $2,000,000.

How much is the Jacobs Associates Inc Dba Delve Underground contract with San Francisco County worth?

The Jacobs Associates Inc Dba Delve Underground contract with San Francisco County is valued at New total not to exceed $30,780,000; increase of $2,000,000, covering professional services work.

What type of contract is this?

This is a Professional Services contract, documented as a agenda record, structured as a not-to-exceed (ceiling) agreement.

Where was this contract approved?

This contract appears in City and County of San Francisco Board of Supervisors Agenda 2026-10-06 (Agenda), dated October 4, 2026 from San Francisco County. Civic IQ extracts contract records directly from agency meeting documents and solicitations.

What other contracts does Jacobs Associates Inc Dba Delve Underground hold?

Jacobs Associates Inc Dba Delve Underground may hold additional government contracts. View their full contract history, the agencies they serve, and total tracked spend on their Civic IQ vendor profile.

View Jacobs Associates Inc Dba Delve Underground's profile

What is San Francisco County currently buying?

Explore San Francisco County's vendors, signed contracts, and active RFPs on their Civic IQ agency profile.

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