Northwest Pipe Company is a manufacturer of engineered steel water pipeline systems and water related infrastructure products. It manufactures Permalok steel casing pipe, which is a pipe joining system that has a press-fit interlocking connection system and installed in trenchless construction projects. It also manufactures reinforced concrete products, which includes steel casing pipe, bar-wrapped concrete cylinder pipe, as well as linings, coatings, joints, fittings, and specialized components. It also provides solution-based products for a range of markets including water transmission and infrastructure, water and wastewater plant piping, structural stormwater and sewer systems, trenchless technology, and pipeline rehabilitation. Its manufacturing facilities located in Portland, Oregon; Adelanto, California; Saginaw, Texas; Tracy, California; Parkersburg, West Virginia; Salt Lake City, Utah; Orem, Utah; St. George, Utah; St. Louis, Missouri; and San Luis Rio Colorado, Mexico.