EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-190854, 333-20165, 333-20167, 333-64083, 333-68176, and 333-152573) of Northwest Pipe Company of our report dated March 17, 2014, except with respect to our opinion on internal control over financial reporting insofar as it relates to the effects of the matter described in the penultimate paragraph of Management’s Report on Internal Control over Financial Reporting, as to which the date is September 4, 2014 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form10-K/A.
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Portland, Oregon
September 4, 2014
