The state government will provide nearly US$30mn for the work.
In her inauguration speech and at a subsequent event, mayor Claudia Sheinbaum outlined a raft of plans and projects.
The miner's logistics optimization head said that it does not have the necessary rail infrastructure to respond to increasing demand for copper concentrates.
The line will be one of the first concessions under the Bolsonaro administration.
The cancellation of Mexico City's new airport and questions over the state of a delayed bridge in Colombia have shaken the Spanish firm's position in Latin America, while the drop in its market value has worsened during recent weeks.
The hearing would be held to discuss the cancellation of the US$14bn international airport that is still being built east of Mexico City.
The heads of 15 municipalities through which the rail line is expected to cross have agreed to work together on the development of infrastructure that will complement the line.
The contracts for terminals 1 through 4 will now expire in May 2020, paving the way for a new operator to be chosen for the whole port.