 Meanwhile, the line from San Antonio Oeste, started at the end of 1908, reached Km 217 in 1911 and Maquinchao two years later.In 1916 this line also came under the administration of Ferrocarriles del Estado, was extended to Ingeniero Jacobacci in 1917 and to Bariloche in 1934.In 1946 a long narrow gauge, , branch line was opened from Ingeniero Jacobacci to Esquel in Chubut Province and became known affectionately as "La Trochita".