Orion Marine Group Announces a Contract Award of Approximately $10 Million

Orion Marine Group, Inc.

(the "Company"), a leading heavy civil marine contractor serving the infrastructure sector, today announced a contract award of approximately $10 million. Orion Marine Group was recently awarded a contract for the construction of a bulkhead at a liquid terminal facility for a private customer in the Gulf Coast region. Onsite construction of the project is expected to commence during the fourth quarter of 2012 and last approximately nine months. 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, the West Coast and the Caribbean Basin and acts as a single source turn-key solution for its customers' marine contracting needs. Its heavy civil marine construction services include marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging, and 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. Forward-Looking Statements The matters discussed in this press release may constitute or include projections or other forward-looking statements within the