Investor Presentaiton

STRATEGIC FOOTPRINT WITH CUSTOMER ACCESS ACROSS THE U.S. 20-year water infrastructure Investment need by state Northwest Pipe is well positioned to serve its customers and states that are most in need of water infrastructure investment. ☐ Northwest Pipe Company Water CAPEX, US$ 1 < $1 Billion > $1 Billion <$5 Billion > $5 Billion <$10 Billion > $10 Billion 1. Source: Bluefield Research. CORPORATE HEADQUARTERS ENGINEERED STEEL PRESSURE PIPE PLANTS PRECAST INFRASTRUCURE AND ENGINEERED SYSTEMS PLANTS Note: Indicators in Utah in red signify Geneva plants and indicators in Texas in red signify ParkUSA plants. 5

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