A Leighton Holdings subsidiary has secured a A$172m (US$154m) contract for the provision of mining services at the Martabe gold mine in North Sumatra Province, Indonesia.

Under the five-year contract, Leighton is required to undertake mining activities, including mine haul-road construction, topsoil removal, drill and blast, and the construction of mine infrastructure.

Mine production is expected to increase up to 10mtpa at full production, Leighton said.

The company has started mobilisation and the first equipment is due on site in early August 2010.

Leighton Asia managing director Hamish Tyrwhitt said the contract will enable Leighton Asia to diversify its mining operations in Indonesia.

The contract takes Leighton Asia’s work to over A$7bn, the company said.