Modern electric locomotives in open-pit mine haulage (44–28)

Sidney Withington (New York, New Haven, and Hartford Railroad Company, New Haven, Conn.): These two papers contain data of value in connection with a special type of railroad operation, and supplement each other very well. It would add to the interest of both papers if some mention could be made of the method used in dividing the service between electric locomotives and the Diesel equipment in operation at Morenci. It would be logical to use the Diesel locomotives where it is necessary to move the tracks and contact system frequently and where blasting debris would injure the contact system; leaving the electric equipment to operate where the power distribution can be permanently installed.