Hundreds of train drivers at BHP's massive Western Australian iron ore mining operations have voted to start industrial action amid a pay dispute.
The measures could include work stoppages, speed reductions and work bans if negotiations for better pay and conditions fail.
"The ballot result sends a strong message to BHP that iron ore train drivers have had a gutful and are willing to take strong action for a new Enterprise Agreement," Mining and Energy Union WA secretary Greg Busson said on Monday.
Mr Busson said the MEU and BHP Iron Ore had been bargaining for almost two years on a replacement for the BHP Billiton Iron Ore Locomotive Drivers Agreement 2014.
The agreement covers about 500 drivers who operate trains carrying iron ore from BHP's Pilbara mines around Newman to Port Hedland.
Drivers want action in a range of areas, including guaranteed annual pay increases and consistent standards in areas including training, consultation, accommodation, application of flight assistance, dispute resolution and the process to change rosters.
Further meetings will be held this week.