The EMD GR12U # 93 and # 412 of the Ferronor (Empresa de Transporte Ferroviario S.A.), built in 1965/1962, are leaving tunnel # 2 on the 1 meter gauge railway line of the Codelco, pulling a mixed copper concentrates and sulfuric acid tank cars train from Llanta up to Potrerillos, shortly above Montandon. Sadly, this spectacular railway was destroyed in 2015 by heavy floods and was never reconstructed.
