Project Manual Vol. 8 for Sewer MA Lining Contract 1

This Project Manual Volume 8 is technical documentation provided by the City of Seattle Department of Finance and Administrative Services for a competitive sealed bid public works project (PW# 2025-066) involving sewer mainline rehabilitation. The project encompasses 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 to 27 inches in diameter and include work elements such as 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 project proposal is due on April 8, 2026, with a posting date of March 5, 2026. The comprehensive eight-volume project manual provides detailed technical specifications, requirements, and standards that contractors must follow to ensure compliance with all applicable City of Seattle standards and regulatory requirements.

The Engineer's Estimate for this project is $10,130,000.00, funded through the Drinking Water Fund. 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, which mandates workforce participation from economically distressed communities, women, and people of color. 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 and must demonstrate compliance with responsible bidder requirements including possession of a Washington State contractor registration certificate, UBI number, and industrial insurance coverage. 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 a bid guaranty equal to five percent of the total bid including retail sales tax must be submitted through OpenGov.