Sterling Infrastructure (STRL) 10-K 2010 FY Annual report

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated March 16, 2011, with respect to the consolidated financial statements and internal control over financial reporting included in the Annual Report of Sterling Construction Company, Inc. on Form 10-K for the year ended December 31, 2010. We hereby consent to the incorporation by reference of said reports in the registration statement of Sterling Construction Company, Inc. on Form S-3 (File No. 333-152371, effective August 4, 2008) and Form S-8 (File No. 333-135666, effective July 10, 2006).

/S/ GRANT THORNTON LLP

Houston, Texas

March 16, 2011

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