Once the dock was finished, it was acquired by the Government of Argentina and added to the Navy in 1914. The company made the arrangements to get a concession to build an extension branch to Bahía Blanca and an access to Port of ingeniero White through a junction with Buenos Aires Great Southern Railway to freight services exclusively. Concession was granted so therefore the RPBR started to work. The line connected with Central Argentine and Western railways in Rosario and Timote respectively.