HOUSTON, July 17, 2008 (PRIME NEWSWIRE) -- Orion Marine Group, Inc. (NasdaqGM:OMGI - News) (the ``Company'') will conduct a telephone briefing at 10:00 a.m. Eastern Time/9:00 a.m. Central Time on Thursday, August 7, 2008, to discuss its results for the second quarter 2008. To listen to a live broadcast of this briefing, visit the Investor Relations section of the Company's website at http://www.orionmarinegroup.com. To participate in the call, please call the Orion Marine Group Second Quarter 2008 Earnings Conference Call at 877-627-6582.

A replay of this briefing will be available on the Web site within 24 hours and will be archived for two weeks. To listen to the replay by phone, please call the replay line at 888-203-1112; passcode 6568456.

About Orion Marine Group

Orion Marine Group, Inc. provides a broad range of marine construction and specialty services on, over and under the water along the Gulf Coast, the Atlantic Seaboard and the Caribbean Basin and acts as a singlesource turnkey solution for its customers' marine contracting needs. Its heavy civil marine construction services include marine transportation facility construction, dredging, repair and maintenance, bridge building, marine pipeline construction, as well as specialty services. Its specialty services include salvage, demolition, diving, surveying, towing and underwater inspection, excavation and repair. The Company is headquartered in Houston, Texas and has a 75-year legacy of successful operations.

The Orion Marine Group, Inc. logo is available at http://www.primenewswire.com/newsroom/prs/?pkgid=4539

          Orion Marine Group, Inc.
          Chris DeAlmeida, Director of Investor Relations
          713-852-6506