Chicago & Illinois Midland 2-10-2 "Santafe" Locomotives

The Chicago & Illinois Midland Railroad bought two "Santa Fe" type locomotives from the Baldwin Locomotive Works in 1927. The pair was classified as Class G-1 and given road numbers 600 and 601. Another pair came from Baldwin in 1929. This second pair was classified as G-2 and assigned road numbers 602 and 603. These four locomotives were low drivers as compared to other 2-10-2 and were intended coal train duty. They had 57" diameter drivers, 27" x 32" cylinders, a 200 psi boiler pressure, they exerted 69,575 pounds ands each weighed 352,000 pounds. The firebox had combustion chamber, arch tubes and thermic siphons added 116 square feet to the firebox heating surface. The piston valves had a 14" diameter.

In 1931, an order was given to the Lima Locomotive Works for four more 2-10-2s need for drag-freight service. These four were designated as Class H-1 with road numbers 700 through 703 assigned. The locomotives had 63" diameter drivers, 30" x 32" cylinders, a 200 psi boiler pressure, they exerted 77,714 pounds and each weighed 405,600 pounds.

During the years from 1941 and 1959 the C&IM bought nine second-hand "Santa Fe" locomotives from the Wabash. These locomotives were designated as Class G-4 and were assigned road numbers 651 through 659.

In 1951, C&IM bought another nine second-hand "Santa Fes" this time from the Atlantic Coast Line. They were put on the roaster as Class H-2 with road numbers 751 through 759.

There are no surviving C&IM 2-10-2 "Santa Fe" type locomotives.

Roster by Richard Duley

Class Qty. Road Numbers From Other RR Year Acquired Year Built Builder Notes
G-1 2 600-601 1927 Baldwin Numbers 600 and 601 scrapped in 1955.
G-2 2 602-603 1929 Baldwin Numbers 602 and 603 scrapped in 1955.
G-4 9 651-659 Wabash 1941-1950 1917 ALCO Numbers 651-659 bought second-hand from the Wabash. Numbers 651 and 652 bought in 1941, ex Wabash numbers 2510 and 2514. Numbers 653, 654 and 655 bought in 1942, ex Wabash numbers 2517, 2518 and 2523. Numbers 656 and 657 bought in 1947, ex Wabash numbers 2501 and 2524. Numbers 658 and 659 bought in 1950, ex Wabash numbers 2515 and 2519. Wabash number 2520 was bought for parts only in 1950. Numbers 651-659 scrapped between 1952 and 1955.
H-1 4 700-703 1931 Lima Numbers 700-703 scrapped in 1955.
H-2 9 751-759 ACL 1951 1925 Baldwin Numbers 751-759 bought second-hand from the Atlantic Coast Line in 1951. All scrapped in 1955.

Class Details by Steve Llanso of Sweat House Media

Class G-1/G-2 (Locobase 3170)

Data from C&IM 4 - 1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Vol 77, pp.738+. Works numbers were 60245-60246 in October 1927 and 61025-61026 in September 1929.

110 sq ft (10.2 sq m) in the combustion chamber, 96 sq ft (8.9 sq m) in three thermic syphons (two in the firebox, one in the combustion chamber), and 20 sq ft (1.85 sq m) of three arch tubes contributed to the firebox's heating surface. Compared to other 2-10-2s of the era, these were low-drivered, coal train engines. Steam supply was adequate and, given the speeds, the 14" (356 mm) piston valves probably did the job as well.

Locobase 76 shows the Lima Super Santa Fes of 1931. Like those engines, all of the Baldwins served until the end of steam. 601 retired in August and the others in December 1955.

Class H-1 (Locobase 76)

Data from tables in 1930 Locomotive Cyclopedia and C&IM 4 1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 7572-7573 in February 1931 and 7584-7585 in April.

These were bigger Santa Fes than the 1927 Baldwins (Locobase 3170) and filled out the Chicago & Illinois Midland's 2-10-2 stud. Embracing the "power at speed" superpower formula advanced by the Ohio builder, the design had 15" (381 mm) piston valves to serve the big cylinders, 142 sq ft (13.2 sq m) of arch tubes and thermic syphons to add to the firebox and combustion chamber heating surface, and taller drivers for faster running.

Like the others, they ran until the end of steam in drag-freight service before retiring in December 1955.

Specifications by Steve Llanso of Sweat House Media
Class G-1/G-2 H-1
Locobase ID 3170 76
Railroad Chicago & Illinois Midland Chicago & Illinois Midland
Country USA USA
Whyte 2-10-2 2-10-2
Road Numbers 600-603 700-703
Gauge Std Std
Builder Baldwin Lima
Year 1927 1931
Valve Gear Walschaert Walschaert
Locomotive Length and Weight
Driver Wheelbase 21' 22.25'
Engine Wheelbase 41.17' 42.50'
Ratio of driving wheelbase to overall engine wheebase 0.51 0.52
Overall Wheelbase (engine & tender) 80.33' 85.67'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers 280100 lbs 321700 lbs
Engine Weight 357800 lbs 405600 lbs
Tender Light Weight 220300 lbs 286000 lbs
Total Engine and Tender Weight 578100 lbs 691600 lbs
Tender Water Capacity 12000 gals 15000 gals
Tender Fuel Capacity (oil/coal) 20 tons 28 tons
Minimum weight of rail (calculated) on which locomotive could run 93 lb/yard 107 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter 57" 63"
Boiler Pressure 200 psi 200 psi
Cylinders (dia x stroke) 27" x 32" 30" x 32"
Tractive Effort 69575 lbs 77714 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03 4.14
Heating Ability
Firebox Area 445 sq. ft 528 sq. ft
Grate Area 76.30 sq. ft 88.20 sq. ft
Evaporative Heating Surface 4585 sq. ft 4870 sq. ft
Superheating Surface 1066 sq. ft 1285 sq. ft
Combined Heating Surface 5651 sq. ft 6155 sq. ft
Evaporative Heating Surface/Cylinder Volume 216.21 186.02
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation 15260 17640
Same as above plus superheater percentage 18159 21344
Same as above but substitute firebox area for grate area 105910 127776
Power L1 14698 15301
Power MT 578.43 524.29


  • 652 (J. R. Quinn Photo, Gary Stuebben Collection)


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