NASA’s Stennis Space Center near Bay St. Louis, Miss., has awarded an indefinite-delivery, indefinite-quantity contract to Decatur, Ala.-based M&D Mechanical Contractors Inc. to provide general construction services at the rocket-testing center, the U.S. space agency said April 12.

The five-year contract is worth up to $25 million and covers maintenance, repair, alteration, civil and mechanical engineering, piping and structural fabrication and erection, and electrical work.