Magma Arizona Railroad No. 10 (ne McCloud River Railroad No. 29) at the Arizona Railway Museum.

(user:Jot Powers, CC BY-SA 2.0 <>, via Wikimedia Commons)


Baldwin logo.

BALDWIN DRS-6-6-1500

The Baldwin DRS-6-6-1500 was a diesel-electric locomotive rated at 1,500 horsepower (1,100 kW), that rode on a pair of three-axle trucks, having a C-C wheel arrangement. It was built by the Baldwin Locomotive Works from February 1948–July 1950.


Chesapeake & Ohio Baldwin DRS-6-6-1500 5532 at Columbus, Ohio, August 18, 1960. Photographer unknown.

C&O owned just three of these, built in November, 1949. This unit was traded in to EMD in May, 1963, the first to be retired.

(Craig Garver, Public domain,


Original buyers

Railroad Quantity Road numbers Notes
Bessemer and Lake Erie Railroad 5 403–407
Chesapeake and Ohio Railway 3 5530–5532
Chicago and North Western Railway 8 1500–1502, 1505–1509
Duluth, South Shore and Atlantic Railway 4 200–203 to Soo Line Railroad 384–387
Elgin, Joliet and Eastern Railway 2 500–501 ex Bessemer and Lake Erie 401–402
Erie Railroad 12 1150–1161
Kaiser Steel 2 1010A, 1010B
McCloud River Railroad 2 28, 29
Minneapolis, Northfield and Southern Railway 1 15
Northern Pacific Railway 1 177 Renumbered 525 to Burlington Northern 407
Southern Pacific Company 24 5203–5226
Southern Pacific Company 1 5227 B unit
Southern Pacific Company (Texas & New Orleans) 4 187–190
Tennessee Coal, Iron and Railroad 2 1500, 1501
Union Railroad 12 613–624
Total 83

Burlington Northern Baldwin DRS-6-6-1500 407 at Pasco, Washington, June 30, 1971. Photographer: Ed Kanak. This

engine  was built by Baldwin in August, 1948 as Northern Pacific 177. It was specifically bought for the Walla Walla

Branch. The bridge over the Snake River imposed a weight limit of 300,000 lbs gross weight. While under construction, 

Baldwin determined the gross weight would actually be 315,000 lbs. Northern Pacific did an engineering study and

determined that  the 52,500 lbs per axle was comparable to a T or T-1 class 2-6-2, a W or W-1 2-8-2, or a Z-3 Mallet,  and

would require a speed  restriction of eight miles per hour. When the unit arrived in Missoula, Montana, on August 13,

1948,  set the unit up for service  the next day. It began service on the Walla Walla Branch on August 17 between Pasco

and Walla Walla, Washington.

(Craig Garver, Public domain,



Type and origin
Power type: Diesel electric
Builder: Baldwin Locomotive Works
Model: DRS-6-6-1500
Build date: February 1948–July 1950
Total produced: 83
​• AAR C-C
Gauge: 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime mover: 608SC
RPM range: 625 (max)
Aspiration: Turbocharged
Cylinders: 8
Cylinder size: 12.75 in × 15.5 in (324 mm × 394 mm)
Performance figures
Power output: 1,500 hp (1.12 MW)


Southern Pacific Baldwin DRS-6-6-1500 5206, in 1959, location and photographer unknown.

(Craig Garver, Public domain,