With 13 facilities across North America, Northwest Pipe Company is the leading manufacturer of water infrastructure products. The patent-pending InfraShield® Seismic Resilient Joint System is our latest innovation in engineered steel water transmission pipe. Precast products include stormwater and wastewater management technologies by ParkUSA and corrosion-resistant lined manholes and RCP by Geneva Pipe and Precast. Our Permalok steel casing pipe is the preferred option for trenchless projects.