 An occasional second section was operated (usually a unit grain train) which were assigned Trains 603 (southbound) and 604 (northbound).A five-day a week "El Reno Turn" was operated between Oklahoma City and El Reno as Train 537 (westbound) and Train 538 (eastbound).The 7 day a week Oklahoma City to Richards Spur rock trains were Trains 521 and 531 (southbound empties) and Trains 522 and 532 (northbound loads).