April 21 (Reuters) - Bhp Billiton Plc BLT.L
* BHP Billiton Mitsubishi Alliance will invest US$204 million in the Caval Ridge Southern Circuit capital growth project, in central Queensland's Bowen basin
* Project will create up to 400 new construction jobs and lock in approximately 200 ongoing operational roles
* Will also result in the caval ridge preparation plant increasing its throughput to reach its 10 million tonne per year capacity
* Construction of the project is scheduled to commence mid CY2017 and take 18 months to complete
* bhp billiton mitsubishi alliance will also invest in new mining fleet, including excavators, and trucks. Source text for Eikon: ID:nNDL9ChKnS Further company coverage: BLT.L