Project_Manual_Vol._5_(PW#_2025-066).pdf

This is a Project Manual for the City of Seattle's Sewer MA Lining Contract 1 (PW# 2025-066), a significant public works project managed by the City of Seattle, Washington. The project encompasses the rehabilitation of approximately 64,000 lineal feet of existing sanitary sewer, combined sewer, and storm pipes at various locations throughout Seattle using Cured-in-Place Pipe (CIPP) installation methods, including fiberglass lining with ultraviolet light curing and felt lining with steam or water thermal curing. The mainline pipes being rehabilitated range from 6 inches to 27 inches in diameter across 263 pipe segments. Work elements include traffic control, bypass pumping, pre-construction closed circuit television (CCTV) video inspection, debris removal, removal of intruding lateral piping and obstructions, installation of pre-liners, CIPP liner installation and molding, lateral reinstatement, and post-construction CCTV inspection. The project is subject to the City of Seattle's Community Workforce Agreement (CWA) and Priority Hire program under Seattle Municipal Code 20.37, which aims to provide employment opportunities for individuals from economically distressed communities, women, and people of color.

The Engineer's Estimate for this project is $10,130,000.00. As a Covered Project, the contract requires compliance with the City of Seattle's Priority Hire program, which supports racial and economic equity in contracting by providing skilled workers from underrepresented communities to contractors and creating job access for economically disadvantaged populations. The project manual establishes the technical specifications, requirements, and standards that contractors must follow throughout the execution of the sewer rehabilitation work.