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EMD SD9
Burlington Northern SD9 #6234.
Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Division (EMD) Model SD9 Build date January 1954 – June 1959 Total produced 515
Specifications Configuration: ​  • AAR C-C Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Wheel diameter 40 in (1,016 mm) Wheelbase 48 ft 7 in (14.8 m) Length 60 ft 8.5 in (18.5 m) Fuel capacity 1,200 or 2,400 US gal (4,500 or 9,100 L; 1,000 or 2,000 imp gal) Lubricant cap. 200 US gal (757 L) Sandbox cap. 50 cu ft (1.4 m3) Prime mover EMD 16-567C Engine type V16 diesel Boiler Vapor-Clarkson Steam Boiler OK4625 Cylinders 16
Performance figures Maximum speed 65 mph (105 km/h) Power output 1,750 hp (1.30 MW) Tractive effort Starting: 90,800 lbf (403.90 kN) @25% Continuous: 75,000 lbf (333.62 kN) @ 9.3 mph
Career Nicknames Cadillac Disposition Some preserved, some rebuilt, some still in service, remainder scrapped
References:[1]

The EMD SD9 is a six-axle diesel-electric locomotive built by General Motors Electro-Motive Division between January 1954 and June 1959.

Four hundred and seventy-one SD9s were built for American railroads, while a further 44 were produced for export.

Many SD9s both high and short hood can still be found in service today on shortline railroads and industrial operators. Although most Class 1 roads stopped using these locomotives by the 1970s and 1980s, some remain in rebuilt form on some major Class I railroads, as switcher locomotives.

Design

The SD9 locomotives used a EMD 567C 16-cylinder engine generated 1,750 horsepower (1.30 MW). Externally similar to its predecessor, the SD7, the SD9 was built with the improved and much more maintainable 567C engine.

History

The SD9 was the second model of EMD's SD (special duty) line of locomotives, following the SD7. Just as the SD7 was a lengthened GP7 with two additional axles, the SD9 was a corresponding modification of the GP9. The additional axles in SD series locomotives provide more tractive effort and more even distribution of locomotive weight compared to the four axle GP series locomotives.^[2]

SD9s can be distinguished from the similar looking SD7s by observing the position of the classification lights on the ends of the locomotive, above the number board. The SD9's classification lights are on a small pod, canted outward, while the SD7's classification lights are closer to the centerline and flush with the hood.^[3]

The last phase of construction had a carbody similar to the SD18 and SD24, and used two 48-inch (1,219 mm) cooling fans instead of four 36-inch (914 mm) cooling fans.

EMD ended SD9 production in June 1959. It was succeeded by the SD18 which began production in 1960.

Accidents and incidents

• On September 4, 1967, Great Northern SD9 #576 was involved in a fire at Superior, Wisconsin, but was rebuilt after the accident.^[4]
• On April 26, 1972, Denver and Rio Grande SD9 #5305 was involved in a wreck at Pueblo, but was rebuilt in September 1972 with a short low hood.^[5]

Variants

SD9s

EMD produced a lightweight variant of the SD9, named the SD9s. This locomotive had its weight reduced for service on lighter tracks with modifications such as a smaller fuel tank.^[3]

Rebuilds

SD9-3

Burlington Northern and Santa Fe Railway (BNSF) had rebuilt four of their SD9 locomotives that were originally built for the Chicago, Burlington, and Quincy Railroad (CB&Q) into SD9-3 locomotives.

SD9E

Between August 1970 and March 1980, the Southern Pacific Transportation Company had rebuilt 144 of their units into EMD SD9E diesel locomotives under their own rebuild program known as the General Rehabilitation and Improvement Program (G.R.I.P) and renumbered 142 of their rebuilt units as 4300-4441 and two additional rebuilt units being renumbered as 4450 and 4451, as well as reclassifying their 142 units as EF618E-1 and classified their two units #4450 and #4451 as EF618E-2, which had left six other SD9 locomotives un-rebuilt.^[6]

SD9m

The SD9m was a rebuild from SD7s and SD9s mostly by Norfolk Southern Railway (NS). NS rebuilt a total of ten SD9 units and used them in revenue service between 1989 and 2010.^[7]

Only two SD9m units are in preservation:

• NS #52 which was restored into its Norfolk and Western (N&W) colors and N&W number #2349.
• NS #57, which was restored to its original Nickel Plate (NKP) colors and original number #358 by Progress Rail.^[8][9][10]

SD10

The EMD SD10 were a rebuild from four EMD SD7 locomotives and seventeen EMD SD9 diesel locomotives. These units were rebuilt by the Chicago, Milwaukee, St. Paul and Pacific Railroad (CMstP&P)/Milwaukee Road (MILW) between March 1974 and January 1976.^[11]

Original buyers

Image	Railroad	Quantity	Road numbers	Notes	Refs.
	Electro-Motive Division (demonstrator)	1	5591	to Duluth, Missabe and Iron Range 110
	Atlanta and St. Andrews Bay Railroad	3	503–505
	Baltimore and Ohio Railroad	10	765–774
	Chicago, Burlington and Quincy Railroad	80	325–374, 430–459	300s had steam generators. To Burlington Northern 6127-6206
	Chicago, Burlington and Quincy Railroad (C&S)	23	820–842	To Burlington Northern 6215-6237 6234 preserved
	Central of Georgia Railway	6	202–207
	Chicago and Illinois Midland Railroad	5	50–54
	Chicago and North Western Railway	14	1701–1710, 1721–1724	Fitted for Chicago commuter service
	Chicago, Milwaukee, St. Paul and Pacific Railroad	14	2224–2237	Renumbered 530-543
	Chile Exploration	5	901–905	Track gauge?
	Duluth, Missabe and Iron Range Railroad	73	101–109, 111–174	129–130 had steam generators
	Denver and Rio Grande Western Railroad	10	5305–5314		[5]
	Elgin, Joliet and Eastern Railway	3	600–602
	Great Northern Railway	27	573–599	To Burlington Northern 6100-6126	[4]
	Korail (Korea)	29	101–129	Later renumbered 5001-5029
	New York, Chicago and St. Louis Railroad (“Nickel Plate Road”)	20	340–359
	Orinoco Mining (Venezuela)	10	1011–1020
	Pennsylvania Railroad	25	7600–7624
	Reserve Mining Company	6	1220–1225	To Escanaba and Lake Superior Railroad
	Soo Line (Wisconsin Central Railroad)	1	2381
	Southern Pacific Transportation Company	150	5340–5444, 5449–5493	5340–5391 had steam generators. 144 rebuilt into SD9Es	[6]
	Total	515

Preservation

Stored

• Southern Pacific SD9E #4451 is currently stored in derelict condition at Schellville, California where its future remains undetermined.
• Southern Pacific SD9E locomotive #4433 was used on the Portland and Western Railroad (P&W) as PNWR #1854 for switching and industry service, however it is still in service specifically for being assigned to the rock train. The unit was retired in February 2024 and was stored at Albany, Oregon for the time being.

Currently preserved

Some SD9 locomotives can be found in museums and on tourist lines, and at least two are in service on a working railroad.

• 

  BNSF #1550 is preserved at the Lake Superior Railroad Museum, having been donated by BNSF in 2022.^[12] It is classified as an SD9-3.
• BNSF #1552 is stored on the now-defunct Blackwell Northern Gateway Railroad in Oklahoma, intended for preservation. It is classified as an SD9-3.
• BNSF #6125 (ex-GN #598) is preserved at the Inland Northwest Rail Museum at Reardan, Washington, having been donated in 2020. It is being restored into its original Great Northern appearance.^[13]
• Burlington Northern #6139 is preserved and operational on the Oregon Coast Scenic Railroad.
• Burlington Northern #6234 (ex-Colorado & Southern #839) is preserved and operational at the Minnesota Transportation Museum. It now operates on the museum's Osceola and St Croix Valley Railway. #6234 is an example of the last variation of SD9 locomotives produced, which used the SD18 carbody.
• Great Northern #599 is preserved by the Inland Northwest Rail Museum in Reardan, Washington. It will undergo a cosmetic restoration, with mechanical parts used for the restoration of #598. ^[14]
• Korail 5025 is only preserved SD9 in Korea, plinthed in front of Daejeon MPD [ko], along single G12 4102. Both engines worked for construction of Korea Train Express Gyeongbu section as departmental vehicles after their retirement on Korail.
• Milwaukee Road #532 (an SD10) is preserved and operational at the Whitewater Valley Railroad.^[11]
• Nevada Northern Railway SD9E #204 (ex-SP #4426) is preserved and operational at the Nevada Northern Railway Museum in Ely, Nevada.
• Nickel Plate Road SD9m #358 is preserved at the Fort Wayne Railroad Historical Society. It has been restored into its original appearance.^[8][9][10]
• Norfolk and Western SD9m #2349 (ex-NKP #349) is preserved at the Mad River & Nickel Plate Railroad Museum. It was donated to the museum in December 2010 by Norfolk Southern.

• 

  Portland and Western Railroad SD9E #1852 is stored in Albany, Oregon. While it was sold to Dieselmotive Company, Inc. (BUGX) in 2023 for preservation, the February 2024 shutdown of the Blackwell Northern Gateway Railroad has led to #1852 remaining stored on the P&W for the time being.
• Southern Pacific SD9E #4404 is preserved on the Pend Oreille Valley Railroad in Usk, Washington.
• Southern Pacific SD9E #4439 is currently under ownership of Western Rail Inc. (WRIX) as WRIX #439.

• 

  Southern Pacific SD9E #5399 is preserved on the Albany & Eastern Railroad (AERC). Restored to SP's "Black Widow" paint scheme, it is used for both freight and passenger service.
• Southern Pacific SD9E #5472 is preserved and operational on the Niles Canyon Railway.^[15]
• Southern Pacific SD9E locomotive #4303 is currently under ownership of the Dieselmotive Company Inc. (BUGX) as BUGX #4303.
• Southern Pacific SD9E locomotive #4304 is currently under ownership of the Dieselmotive Company Inc. (BUGX) as BUGX #4304.
• Southern Pacific SD9E locomotive #4427 is currently being used in revenue freight service on the Dakota Southern Railway.^[16]

Formerly preserved, scrapped during preservation

• Southern Pacific SD9E #4368 was used on the Port of Tillamook Bay Railroad (POTB)^[17] until being scrapped in October 2010 after POTB had went defunct in 2007.
• Southern Pacific SD9E #4381 (that still had the Southern Pacific's "Kodachrome" livery of the proposed and failed merger between Southern Pacific and Santa Fe) was used on the Port of Tillamook Bay Railroad (POTB)^[17] until being scrapped in January 1999 after being involved in an accident when its brakes had failed which it had derailed and rolled down a hill.
• Southern Pacific SD9E #4414 was used on the Port of Tillamook Bay Railroad (POTB)^[17] until being scrapped in October 2010 at the Tillamook Air Museum after POTB had went defunct in 2007.
• Southern Pacific SD9E #4432 was used on the Port of Tillamook Bay Railroad (POTB) until being scrapped in October 2010 after POTB had went defunct in 2007
• Southern Pacific SD9E #4450 "Huff" was used on the Golden Gate Railroad Museum^[18] before being donated to Western Pacific Railroad Museum alongside Southern Pacific SD9E #4404 until being scrapped in August 2013 due to its poor condition and lack of alignment control couplers.^[19]

References

Further reading

• Withers, Paul K. (1996). Diesel Era November/December 1996, Vol 7 No.6. Withers Publishing.
• Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
• Sarberenyi, Robert. EMD SD9 Original Owners. Retrieved on August 27, 2006
• Komanesky, John. Preserved EMD Locomotives. Retrieved on May 18, 2009

External links

• Media related to EMD SD9 locomotives at Wikimedia Commons