Project Manual Volume 2 for Sewer Mainline Rehabilitation Contract

This is a Project Manual document prepared by the City of Seattle Department of Finance and Administrative Services for a public works sewer mainline rehabilitation contract (PW# 2025-066). The project involves the rehabilitation of approximately 64,000 lineal feet of existing sanitary sewer, combined sewer, and storm pipes across 263 pipe segments using Cured-in-Place Pipe (CIPP) installation methods at various locations throughout Seattle. The mainline pipes being rehabilitated range from 6 inches to 27 inches in diameter. The scope of work includes traffic control, bypass pumping, pipe cleaning, pre-construction and post-construction closed circuit television (CCTV) video inspection, debris removal, removal of intruding lateral piping and obstructions, pre-liner installation, CIPP liner installation and molding utilizing either fiberglass with ultraviolet light curing or felt lining with steam or water thermal curing, and reinstatement of service laterals. The proposal due date is April 8, 2026, with the posting date of March 5, 2026. This project is designated as a Covered Project subject to the City of Seattle's Community Workforce Agreement (CWA) and Priority Hire requirements under Seattle Municipal Code 20.37.

The Engineer's Estimate for this project is $10,130,000.00, which is funded through the Drinking Water Fund. Bidders must submit a Women and Minority Business Inclusion Plan scoring a minimum of 10 points out of 16 available points to be deemed responsive. All bidders must demonstrate compliance with responsible bidder requirements under RCW 39.04.350, including possession of a Washington State contractor registration certificate, UBI number, and industrial insurance coverage, and must submit a bid guaranty equal to five percent of the total bid including retail sales tax through OpenGov. Bidders with an estimated project cost of $1,000,000 or more must submit a Bidder/Subcontractor List identifying subcontractors or indicating intent to self-perform. All work must comply with prevailing wage standards applicable to public works projects in Seattle, and contractors must demonstrate capacity to meet workforce diversity requirements throughout project execution. The project is structured to reflect the City of Seattle's commitment to racial and economic equity through contracting.