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November 2018



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CLOSED-SCWQP Ballard Conveyance Design and Engineering Services; SPU RFP# 18-254-S

Original Date Posted: November 28, 2018 11:27 am

Due Date: 12:00 PM (noon), on Tuesday, December 18, 2018

Request for Proposals (RFP) for

SCWQP Ballard Conveyance Design and Engineering Services
SPU RFP# 18-254-S

Seattle Public Utilities (SPU) is requesting proposals from qualified consultants for design and engineering services for the Ballard Conveyance project that includes project management, geotechnical engineering, engineering design, utility coordination, O&M planning, bid support, permit support, and public outreach support. Ballard Conveyance diverts and controls combined sewer flows from SPU’s Ballard Basin 152 to the Ship Canal Water Quality Project (SCWQP) storage tunnel. The purpose of this project is to collect basin flows that currently overflow through Outfall 152 and bring the Basin into regulatory compliance by reducing the frequency of overflows to an average of one per year on a 20-year rolling average.

The scope of the Ballard Conveyance design contract includes designing a conveyance system to divert and direct flows from SPU’s Ballard Basin 152 to the storage tunnel. The main components of the project include a diversion structure to divert flows from outfall 152, conveyance pipes, a gate valve vault to control flows to the tunnel, and maintenance holes used for accessing and maintaining the system. The scope also includes tasks to support the Wallingford Conveyance project’s in-house designers with hydraulic design, physical modelling, and landscape architecture.

The selected consultant will provide design and engineering services, including engineering support services during the construction phase for both Ballard and Wallingford Conveyance projects. The initial design phase contract is estimated at $3,100,000, not including a planned amendment for engineering services during construction.  The preliminary engineering construction cost estimate for Ballard Conveyance is $16,000,000. This project is anticipated to include federal loans through the Washington Department of Ecology’s State Revolving Fund and the EPA’s Water Infrastructure Finance and Innovation Act (WIFIA).

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 by 12:00 PM (noon), on Tuesday, December 18, 2018, delivered to the 50th Floor, Seattle Municipal Tower, 700 Fifth Avenue, P.O. Box 34018, Seattle, WA 98104-4018.

An optional Pre-Submittal Conference for prospective proposers will be held on Monday, December 3, 2018 in Conference Room SMT 4803 (48th Floor) of the Seattle Municipal Tower Building, 700 Fifth Avenue, Seattle, WA 98104, from 1:30 PM to 2:30 PM. Seattle Public Utilities will review the scope of work, consultant team expectations, and answer questions from the prospective proposers. Time will be allocated for prospective bidders to network with each other and discuss teaming arrangements. Although attendance to this meeting is not mandatory, attendance is highly encouraged.

All questions regarding this request shall be directed only to Maura Donoghue, the RFP Coordinator & SPU’s designated contact person at:

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

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