Northwest Pipe Company, together with its subsidiaries, manufactures and supplies water related infrastructure products in North America. It operates in two segments, Engineered Steel Pressure Pipe (SPP) and Precast Infrastructure and Engineered Systems (Precast). The SPP segment offers large-diameter, high-pressure steel pipeline systems for use in water infrastructure applications, which are primarily related to drinking water systems. Its products are also used for hydroelectric power systems, wastewater systems, and other applications. In addition, this segment makes products for industrial plant piping systems and certain structural applications. The Precast segment provides precast and reinforced concrete products, including manholes, box culverts, vaults, catch basins, oil water separators, pump lift stations, biofiltration, and other environmental and engineered solutions. The company sells its water infrastructure products primarily to installation contractors. Northwest Pipe Company was incorporated in 1966 and is headquartered in Vancouver, Washington.