600 mm (1 ft 11 5⁄8 in) Decauville railroads were used extensively in Buenos Aires Province in rural areas and to carry freight. For passenger services, locomotives for 750 mm (2 ft 5 1⁄2 in) track were readily available and it was decided to pursue this cheaper option. In 1921 it was agreed to lay down the Jacobacci-Esquel line, and also to connect it with the existing private 1,000 mm (3 ft 3 3⁄8 in) gauge railway in the Chubut Valley from Dolavon to Puerto Madryn.