SEOUL - Hyundai Engineering & Construction Co Ltd said it has agreed to work with Russian Railways on a $1.6 billion project in Indonesia to build a railroad and port for coal transport in Kalimantan. A Hyundai spokesman said each participant’s share in the project had yet to be decided. A formal contract for construction is expected in 2015. Indonesia is the world’s biggest exporter of nickel ore, refined tin and thermal coal.