The bids for the project were opened at the ministry's offices in La Paz immediately after the deadline for submission of proposals on October 15. The four bids include:
- China CAMC Engineering - $US 695.23m
- China Railway Seventh Group - $US 472.49m
- China Railway Group International - $US 729.74 and
- China Civil Engineering Tiesiju Group, which submitted documentation but did not specify an economic proposal.
Much of the 100km section of the line between Mutún and Puerto Busch will be built on viaduct as it passes through a large area of marshland.
The construction of the railway will enable minerals from the Mutún area to be exported from a new port at Puerto Busch, which will give the landlocked country direct access to the Atlantic Ocean. At present ore is transported to Brazil via the Tamengo Channel and Puerto Suarez, which is not considered to be an efficient export route.