The Baldwin DS-4-4-660 was a four-axle diesel-electric switcher locomotive built by the Baldwin Locomotive Works at it Eddystone, Pennsylvania factory between 1946 and 1949. It replaced the VO-660 in their catalog, and was in turn replaced by the DS-4-4-750. It was the low power companion to Baldwin's DS-4-4-1000 models.
Original owners RailroadQuantityRoad numbersNotes American Cyanamid Company 1 13 American Rolling Mill Company 1 1001 Chesapeake Western Railway 3 661–663 661 scrapped, 662 and 663 survive in Roanoke, VA. Chicago, St. Paul, Minneapolis and Omaha Railway (“Omaha Road”) 1 71 Chicago and North Western Railway 3 1259–1261 Crows Nest Pass Coal 1 1 Escanaba and Lake Superior Railroad 1 101 Erie Railroad 5 381–385 Georgia Northern Railway 1 102 Long Island Rail Road 4 409–412 New Orleans Public Belt Railroad 6 44–49 Norfolk Southern Railway 3 661–663 Patapsco and Back Rivers Railroad 4 306–309 Pennsylvania Railroad 99 5957–5966, 9000–9049, 9110–9121, 9210–9236 PRR Class BS-6a Sloss-Sheffield Steel 1 30 Tennessee Valley Authority 1 100 Wabash Railroad 2 201–202 Wyandotte Southern Railroad 1 D100 Wyandotte Terminal Railroad 1 104 Total 139
Preservation • Sloss Sheffield Steel #30 is preserved at the Sloss Furnaces National Historic Landmark in Birmingham, AL
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