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July 2020



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CLOSED-Cascades Dam Water Quality Mitigation Options Analysis; SPU RFP/Contract# 20-031-S

Original Date Posted: July 23, 2020 7:30 am

Due Date:

2:00 PM, September 8, 2020

Request for Proposals (RFP) for


Cascades Dam Water Quality Mitigation Options Analysis
SPU RFP/Contract# 20-031-S

The City of Seattle Public Utilities (SPU) is requesting proposals from qualified consultant teams to assist in developing and evaluating options to prevent the harmful results of a potential seismic fail of Cascades Dam.

The Consultant Team is expected to develop options and draft an options analysis report within twelve months of receiving all information regarding the facility’s existing condition.  The report must include permanent and temporary mitigation options and accurate cost estimates to retrofit an earthfill dam to a higher design standard.  The ideal team must be able to demonstrate a clear understanding of the drinking water quality aspects of SPU’s commitment to maintain delivery of high quality drinking water to its customers through an emergency situation.  SPU will use the options analysis to select a preferred option for design and construction.

This is anticipated to be a two (2) year Options Analysis Only contract. The cost of the Options Analysis phase of this project is estimated to be $600,000.  The design and construction of the preferred option will be accomplished under a subsequent contract that will be advertised after SPU selects the preferred option.  Work performed under this options analysis contract will not preclude any consultant firm from performing work on the design and construction of the preferred option. SPU does not guarantee any minimum quantity of Work.

Interested consultants are encouraged to review the RFP, background documents, and any RFP addenda online at  Note that you are required to complete a free registration to view, print or save documents posted on this website.

The deadline for submitting Proposals is 2:00 PM, September 8, 2020. We will only accept electronic proposals via e-mail at

SPU PRE-SUBMITTAL CONFERENCE:  A pre-submittal conference will be held on July 30, 2020 from 1:00 – 2:00 PM, via WebEx Meeting Number (Access Code): 146 995 9938, Meeting Password: M3hhmaZuJ63 at URL: Or join by phone at one of the following: 206-207-1700 or 408-418-9388. Seattle Public Utilities 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.

Written questions related to this RFP are encouraged and shall be directed to Jamie Cortez, Contract Administrator & SPU’s designated contact person, at . In order to facilitate preparation of responses to questions, please submit questions by no later than 3:00 PM on August 6, 2020. All responses to questions will be issued to all RFP recipients in the form of an addendum to this RFP. Addenda will be posted at

The City of Seattle is an Equal Opportunity Employer and selection of the Consultant is subject to applicable laws and ordinances regarding equal opportunity employment.

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