Gold miner Evolution Mining has awarded ASX-listed mining services provider Perenti a near A$520-million underground mining contract at the Cowal gold mine, in New South Wales. Perenti on Tuesday announced that its subsidiary Barminco had been awarded the new contract, expanding the divisions' scope at the mine site to include the development of a second portal, all underground development and production works, and associated underground mining services required to support the continued mill feed of underground ore.