 All machinery, tools, materials and supplies needed for the work were transported from England by boat over the Atlantic Ocean, with a smaller boat over the Magdalena River until Honda, and then by mule and ox.The first track Mariquita - Soledad (today Herveo), was inaugurated in March 1914.Tower number 20 (Torre de Herveo), pictured above, was exceptional as it needed to be constructed in a depression between two hills.