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July 2024



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Vine Street CSO Phased Engineering Support Services; SPU RFP/Contract #24-051-S

Original Date Posted: July 2, 2024 8:00 am

Due Date:

1PM Pacific Time on Tuesday, July 30, 2024

Request for Proposals (RFP) for
Vine Street CSO Phased Engineering Support Services
SPU RFP/Contract #24-051-S

The City of Seattle Public Utilities (SPU) is requesting proposals from qualified consultants to complete design, permitting, and community outreach for the Vine Street combined sewer overflow (CSO) flow redirect project in the City of Seattle’s Belltown neighborhood. The consultant team will also provide engineering support services during the public works contract advertisement, public works contract award period, and during the construction and closeout phases of the planned project. Construction is anticipated to start in 2027.

This contract is expected to support the project through design, construction, and closeout phases including the first year of landscape establishment. The final completion date of all phases of work conducted under this contract is estimated to be the end of 2032. SPU plans to execute a single 8-year phased consulting services contract, with an option to extend additional years. The estimated value of the contract is $4-$5M. 

Interested consultants are encouraged to review the solicitation, background documents, and any addenda online at

The deadline for submitting responses is 1PM Pacific Time on Tuesday, July 30, 2024, electronic submittals are to be uploaded to the City’s Procurement Portal:

SPU PRE-SUBMITTAL CONFERENCE:  An optional pre-submittal conference will be held on Wednesday, July 10th, 2024 from 11AM to 12PM Pacific Time, via MS Teams Meeting ID: 238 867 184 949, meeting passcode: 3kZTGb at URL:  

Or join by phone at: 206-686-8357 ; Phone Conference ID: 723 956 563#. SPU will review the scope of work, consultant expectations, and answer questions from the prospective bidders. Although attendance at this meeting is not mandatory, attendance is highly encouraged.

Proposers may submit questions to the procurement portal (Bonfire) under the Vendor Discussions section. The City strongly prefers that consultants submit questions in Bonfire but will accept questions submitted to the Contract Administrator in email format, as well. Questions shall be directed to Ajla Suta, Contract Administrator & SPU’s designated contact person, at To facilitate preparation of responses to questions, please submit questions by no later than 5PM Pacific Time on Monday, July 15, 2024. All responses to questions will be posted at under the Public Notices Section in the respective procurement opportunity.

Consultant selection for this solicitation will be subject to all applicable laws and ordinances. The participation of women- and minority-owned firms is a high priority cultural value of the City of Seattle and is strongly encouraged at all tiers.

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