Sundance is selling the railway and the port to the Cameroon government, so that is can concentrate on the mining operations. It will of course pay a tariff to use that railway and port.
See: https://au.news.yahoo.com/thewest/wa/a/28632263/sundance-hives-off-port-rail-plans/
About Sundance Resources as at July 2020:
Sundance Resources Ltd, an Australian Company listed on the ASX, is seeking to develop its flagship Mbalam-Nabeba Iron Ore Project, which straddles the border of Cameroon and the Republic of Congo in Central Africa.
Stage One will be the production of a Direct Shipping Ore (“DSO”)-quality sinter fines product averaging >62.0% Fe at a rate of 40Mtpa for approximately 14 years based on blending material sourced from the deposits in the neighbouring countries of Cameroon and Congo.
Stage Two, which is currently at a Pre-Feasibility Stage, would then extend the life of the operation by further 15-plus years producing high-grade Itabirite hematite concentrate.
In April 2011, Sundance completed its Definitive Feasibility Study for Stage One and Pre-Feasibility Study for Stage Two of the Mbalam-Nabeba Iron Ore Project.
The Project will utilise the rail and port infrastructure to be financed, built and owned by the Government of Cameroon, a 540km rail line dedicated to the transport of iron ore through Cameroon and a dedicated mineral export terminal designed for taking bulk iron ore carriers of up to 300,000 tonnes.
The railway will be available for other traffic, such as timber.
A branch line serves the mine in Congo-Brazzaville.