The service for BHP's fly-in, fly-out (FIFO) workers has been in effect since 2006, making the companies continuous partners for 17 years as of the new deal's expiration.
Alliance officials said the BHP agreement was its first for service in Western Australia, for the Leinster and Mount Keith operations, and was the booster for its now-large presence in the Australian state.
"Alliance has worked with BHP Nickel West as a partner in the provision of these services accommodating changes during the resources downturn, and now we are experiencing growth of up to 17 charters per week as economic conditions continue to improve," Alliance CEO Lee Schofield said.
"As with our other resources customers throughout Australia, we are seeing growth in the number of charters as the current demand for resources is maintained and production increases."