EX-23.1 3 dex231.htm CONSENT OF DELOITTE & TOUCHE LLP

CONSENT OF DELOITTE & TOUCHE LLP

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Nos. 333-20165, 333-20167, 333-64083, 333-68176, and 333-152573 on Form S-8 of our reports dated March 21, 2011, relating to the financial statements and financial statement schedule of Northwest Pipe Company and subsidiaries (the “Company”), and the effectiveness of the Company’s internal control over financial reporting (which report expresses an adverse opinion on internal control over financial reporting because of material weaknesses), appearing in this Annual Report on Form 10-K of Northwest Pipe Company and subsidiaries for the year ended December 31, 2010.

/s/ Deloitte & Touche LLP

Portland, Oregon

March 21, 2011