Northwest Pipe Company Announces Major Order.

PORTLAND, Ore. -- Northwest Pipe Company (Nasdaq:NWPX) reported today that it was named to supply approximately $14 million of welded steel pipe to L.H. Woods & Sons, Inc. of Vista, California. The pipe is for the Del Dios Reline Pipeline #4 project for the San Diego County Water Authority.

Northwest Pipe will supply approximately 22,400 feet of 93-inch-diameter steel pipe. The pipe is expected to be manufactured in the Company's Adelanto, California, division, with delivery scheduled to begin in the second quarter of 2005.

Northwest Pipe Company manufactures welded steel pipe in two business segments. Its Water Transmission Group is a leading supplier of large-diameter, high-pressure, steel pipe products used primarily for water transmission in the United States and Canada. Its Tubular Products Group manufactures smaller-diameter steel pipe for a wide range of construction, agricultural, industrial and mechanical applications. The Company is headquartered in Portland, Oregon, and operates eleven manufacturing facilities in the United States and Mexico.

This release contains forward-looking statements, including, but not limited to, those regarding the project described above. These statements reflect management's current views and estimates of market circumstances, industry conditions and company performance. Actual results could vary materially from the description contained herein due to many factors, including market demand, operating efficiencies, availability and price of raw materials, and other risks described from time to time in the company's reports to the Securities and Exchange Commission.