The three-year contract includes spot services, which are expected to see its value exceed well over $US10 million ($A11.1 million).
First revenue from the contract is expected in April.
Works will include the supply of 2.8 tonne and 1.14t cranes at the site.
Austin managing director Michael Buckland said the contract was another strategic win for the company’s equipment division and its plan to secure long-term sustainable earnings.
It follows a number of long-term contracts signed over the past three months, including a three-year supply deal with Vale worth up to $59 million in the first year that would cover dump truck bodies, buckets and ancillary equipment.
Austin’s Chilean division, known as Servigrut, also secured a four-year contract worth $A7.3 million in November with state-owned miner Codelco.
“The Servigrut business, which was recently merged with the Calama equipment business, is the highest-margin business in the company,” Buckland said.
“We also find that once established onsite, we are able to introduce our other products such as trays, buckets and maintenance services.
“The company is also in discussions regarding further contracts of this nature.”
As of October 2012, Spence held a measured resource of 232 million tonnes at 0.91% copper and a processing capacity of 61,000t per day.
Shares in Austin were last trading 3% higher at $2.37.