Welshpool-based contracting group Macmahon Holdings Ltd has secured a three-year extension to its underground mining contract at BHP Billiton's Leinster Nickel Operation, a deal worth around $90 million.

Welshpool-based contracting group Macmahon Holdings Ltd has secured a three-year extension to its underground mining contract at BHP Billiton's Leinster Nickel Operation, a deal worth around $90 million.