PRIMU Primoris Services - Units (MM)

Primoris Services Corporation (Nasdaq:PRIM) (Nasdaq:PRIMW) ("Primoris" or "Company") today announced that its wholly-owned subsidiary, ARB, Inc., was awarded a contract valued at approximately $99.2 million by the Northern California Power Agency ("NCPA") to provide general construction and commissioning services for a power generation facility. This project and the recently announced new construction contracts at the Company's wholly-owned James Construction Group ("James") subsidiary have combined to increase Primoris' current total backlog to more than $1 billion for the first time. The $1 billion backlog amount represents an increase of over 30% in backlog since the end of 2009.

The ARB contract is for a natural gas-fired, combined-cycle nominal 296 megawatt (MW) power generation facility located at NCPA's existing Lodi generation complex on land owned and incorporated by the City of Lodi, 6 miles west of the Lodi city center. Work on the project will start immediately and should be completed on or before June 1, 2012.

ARB will provide procurement, construction, installation, maintenance and operations training, commissioning, start-up and testing services. The combined-cycle generating plant includes one natural gas-fired combustion turbine-generator; one 3-pressure heat recovery steam generator; one condensing steam turbine generator; one natural gas-fired auxiliary boiler; one 7-cell draft evaporative cooling tower and associated support equipment.

Brian Pratt, Chairman and CEO of Primoris, stated "Our milestone backlog of $1 billion is a remarkable accomplishment and a testament to our entire team. While backlog represents only a portion of our future revenue stream and does not guarantee future revenues, we are proud of the contributions from both our California-based businesses and from James, which we acquired in December 2009."

ARB, Inc., part of Primoris' West Construction Services segment, is an industry leader in power-generation construction services. ARB's experience and abilities address a broad spectrum of civil, structural, mechanical, and piping services for both green field and brown field large scale power plants. Many of the company's power projects include turn-key design, procurement, and construction services. ARB has developed niche skills in the power market that include heat-recovery steam generators and SCR installations and retrofits, burner management systems, low-NOx burner and power boiler retrofits, boiler-tube replacements and upgrades, and pressure-vessel and boiler repair.

About Primoris

Primoris, through various subsidiaries, is one of the largest specialty contractors and infrastructure companies in the United States. Serving diverse end markets, Primoris provides a wide range of construction, fabrication, maintenance and replacement services, as well as engineering services to major public utilities, petrochemical companies, energy companies, municipalities and other customers. With the recent acquisition of James Construction Group, Primoris has a significant presence in the Gulf States region where it provides heavy civil construction services. Primoris is also a leading water and wastewater contractor in the state of Florida, and a specialist in designing and constructing complex commercial and industrial concrete structures in California. For additional information on Primoris, please visit www.prim.com.

The Primoris Services Corporation logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=5527

Forward-Looking Statements

This press release contains certain forward-looking statements, including with regard to the Company's future performance. Words such as "estimated," "believes," "expects," "projects," "may," and "future" or similar expressions are intended to identify forward-looking statements. Forward-looking statements inherently involve risks and uncertainties, including without limitation, those described in this press release and those detailed in the "Risk Factors" section and other portions of our Annual Report on Form 10-K for the year ended December 31, 2009 and other filings with the Securities and Exchange Commission, including the Company's Form 10-Q filed on May 10, 2010. Primoris does not undertake any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

CONTACT:  Primoris Services Corporation
          Peter J. Moerbeek, Executive Vice President,
           Chief Financial Officer
          (949) 454-7121
          pmoerbeek@prim.com
          
          The Equity Group Inc.
          Devin Sullivan, Senior Vice President
          (212) 836-9608
          dsullivan@equityny.com