Orion Marine Group Added to Russell 3000 and 2000 Stock Indexes

Houston Texas July 2 2008 (NASDAQ: OMGI) — Orion Marine Group Inc. announced that it has been added to the U.S. broad-market Russell 3000 small-cap Russell 2000 and Russell Microcap® indexes after the equity markets closed on June 27 as Russell Investments reconstituted its comprehensive family of global indexes.

“We are pleased to now be included in the various Russell Indexes” said Mike Pearson Orion Marine Group’s President and Chief Executive Officer. “Russell is an industry leader for stock indexes and we expect our inclusion will generate additional visibility among institutional investors.”

The annual reconstitution of the Russell 3000® captures the 3000 largest U.S. stocks as of the end of May ranking them by total market capitalization. The largest 1000 companies in the ranking comprise the Russell 1000® and the next 2000 companies become the Russell 2000®. Stocks are also added to the appropriate growth and value indexes as well.

Russell indexes are used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. An industry-leading $4.4 trillion in assets currently are benchmarked to them. These investment tools originated from Russell’s multi-manager investment business in the early 1980s when the company saw the need for a more objective market-driven set of benchmarks in order to evaluate outside investment managers.