Two main lines would join San Carlos de Bariloche in the central Andes with the sea ports of San Antonio Oeste on the Atlantic coast to the east, and Puerto Deseado on the coast to the south east. Branches were to be built to connect the mainline with Buenos Aires Lake (connecting at Las Heras) and Comodoro Rivadavia (connecting at Sarmiento). Colonia 16 de Octubre – the Esquel and Trevelin area – would be connected via a branch line to Ingeniero Jacobacci.