Australian mining services firm Macmahon Holdings Limited has commenced Phase 2 of the Batu Hijau contact in Indonesia. Batu Hijau copper and gold mines located in Sumbawa Island and owned by local miner PT Amman Minerals Nusa Tenggara (AMNT).

Macmahon has signed a three-year contract with AMNT. The agreement will see Macmahon assist AMNT to evaluate options to accelerate production from Batu Hijau. The parties will also explore options to potentially develop additional deposits in the same mining area, such as the large Elang resource.