 Unsatisfied with their service, the road pushed onward to a link with the SP at Benson.In 1900 Phelps Dodge commissioned a smelter at the new town of Douglas, and the rails were extended to that property, as well from their south of the border properties at Nacozari in 1902.Again unsatisfied with frieght rates offered by the big railroads, a line extension was pushed to El Paso, TX by 1904.