An EMD GP9 equipped with dynamic brakes on the Shenandoah Valley Railroad in Staunton, VA.

By William Grimes - http://en.wikipedia.org/wiki/Image:DGVR40_Staunton_WJGrimes.JPG, Public Domain, https://commons.wikimedia.org/w/index.php?curid=4481785

Leadville Colorado & Southern 1714 at Leadville, CO. LC&S No. 1714 is an EMD GP9, Builders No. 20644, built August 1955, ex BN 1714.
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Great Western RY GP9 No. 296. Built in 1954 as Union Pacific No. 296 until 1985 when it was sold to the GW. It last served the GW from 1998 to 2003 as a switch engine at Longmont, CO.
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South Branch Valley Railroad engine 6240, an 1957 EMD GP9.
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Former BNSF GP9 No. 1685 built in 1957 sitting in the Prairie Dog Central Yard.
Lehigh Valley GP9 No. 302 at Pittston, PA yard on June 29, 1969.
An EMD GP9 equipped with dynamic brakes on the Shenandoah Valley Railroad in Staunton, VA.
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South Branch Valley Railroad engine 6240, an 1957 EMD GP9.

PRR90 at English Wikipedia [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons

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CN GP9 Locomotive No. 4621 in front of Cytec Industries, Kalamazoo, Michigan.

By Railfan Jack at English Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=16100376

Lehigh Valley GP9 No. 302 at Pittston, PA yard on June 29, 1969.

By railfan 44 [Public domain, Public domain or Public domain], via Wikimedia Commons

Leadville Colorado & Southern 1714 at Leadville, CO.  LC&S No. 1714  is an EMD GP9,  Builders No. 20644, built August 1955, ex BN 1714.

By Len Turner (originally posted to Flickr as LC&S 1714) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

Great Western RY GP9 No. 296. Built in 1954 as Union Pacific No. 296 until 1985 when it was sold to the GW. It last served the GW from 1998 to 2003 as a switch engine at Longmont, CO.    By Don O'Brien from Piketon, Ohio, United States (Great Western RY GP9 #296  Uploaded by PDTillman) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

Former BNSF GP9 No. 1685 built in 1957 sitting in the Prairie Dog Central Yard.

By Taylorover9002 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=40648210

EMD GP9 Diesel-Electric Locomotive
The EMD GP9 is a four-axle diesel-electric locomotive built by General Motors' Electro-Motive Division in the United States, and General Motors Diesel in Canada between January, 1954, and August, 1963. US production ended in December, 1959, while an additional thirteen units were built in Canada, including the last two in August, 1963. Power was provided by an EMD 567C sixteen-cylinder engine which generated 1,750 horsepower (1.30 MW). This locomotive type was offered both with and without control cabs; locomotives built without control cabs were called GP9B locomotives. All GP9B locomotives were built in the United States between February, 1954, and December, 1959.

Production
A total of 3,441 units of this locomotive model were built for American railroads, with an additional 646 for Canadian railroads and 10 for Mexican railroads. 5 units were built for a railroad in Brazil, 4 units were built for a railroad in Peru and 6 units were built for a railroad in Venezuela. Of the GP9B, 165 examples were built for American railroads.

Rebuilds
There were 40 GP9M units built that are included in the 3,441 units built for United States railroads. A GP9M was built with parts from another older EMD locomotive, either an F unit or a damaged GP7. The use of parts from these older locomotives caused the GP9Ms to have a lower power rating than a GP9. This would be either 1,350 horsepower (1.01 MW) if the donor locomotive was an FT/F2 or 1,500 horsepower (1.12 MW) from F3/F7/GP7 locomotives.

Many rebuilt GP9s remain in service today with shortline railroads and industrial operators. Some remain in rebuilt form on some major Class I railroads, as switcher locomotives. Canadian National still has many GP9RM locomotives in operation, as of 2016. Canadian Pacific had many GP9u locomotives in operation; however, they were all retired in 2015.

Several GP9s were rebuilt with a 1,500 horsepower (1.12 MW) CAT 3512 and re-classified as GP15C.

Original buyers
GP9 locomotives built by Electro-Motive Division, USA

Railroad:  Electro-Motive Division (demonstrator)
Quantity:  1
Road numbers:  7257
Notes:  to Western Maryland 33.

Railroad:  Araraquara Railway, Brazil
Quantity:  5
Road numbers:  1001–1005
Notes:  5 ft 3 in (1,600 mm) Gauge.

Railroad:  Atchison, Topeka and Santa Fe Railway
Quantity:  52
Road numbers:  700–751

Railroad:  Baltimore and Ohio Railroad
Quantity:  194
Road numbers:  675–696, 747–752, 3413–3425, 6447–6598, 6498:2
Notes:  6513, 6554 now Greenville & Western 3751, 3752.

Railroad:  Bangor and Aroostook Railroad
Quantity:  5
Road numbers:  76–80

Railroad:  Belt Railway of Chicago
Quantity:  3
Road numbers:  471, 480, 481
Notes:  471 is a GP9M.

Railroad:  Boston and Maine Railroad
Quantity:  50
Road numbers:  1700–1749
Notes:  Remaining units to Guilford Rail System. The last 3 GP9s are on Pan Am Railways.

Railroad:  Butte, Anaconda and Pacific Railway
Quantity:  4
Road numbers:  104–107

Railroad:  Central of Georgia Railway
Quantity:  11
Road numbers:  160–170

Railroad:  Central Railroad of New Jersey
Quantity:  2
Road numbers:  1531, 1532
Notes:  GP9M

Railroad:  Central Vermont Railway
Quantity:  18
Road numbers:  4547–4557, 4923–4929

Railroad:  Chesapeake and Ohio Railway
Quantity:  363
Road numbers:  5901–6263

Railroad:  Chicago and Eastern Illinois Railroad
Quantity:  8
Road numbers:  221, 229, 233–238
Notes:  221, 229 are GP9Ms.

Railroad:  Chicago and North Western Railway
Quantity:  59
Road numbers:  1711–1720, 1725–1773

Railroad:  Chicago, Burlington and Quincy Railroad
Quantity:  20
Road numbers:  270-289

Railroad:  Chicago Great Western
Quantity:  1
Road numbers:  120
Notes:  GP9M

Railroad:  Chicago, Milwaukee, St. Paul and Pacific Railroad (“Milwaukee Road”)
Quantity:  128
Road numbers:  280–331, 2368–2443
Notes:  2368–2443 renumbered 200–279 (not in sequence).

Railroad:  Chicago, Rock Island and Pacific Railroad
Quantity:  21
Road numbers:  1312–1332

Railroad:  Clinchfield Railroad
Quantity:  2
Road numbers:  917, 918

Railroad:  Denver and Rio Grande Western Railroad
Quantity:  24
Road numbers:  5901–5904, 5911–5914, 5921–5924, 5931–5934, 5941–5944, 5951–5954

Railroad:  Detroit, Toledo and Ironton Railroad
Quantity:  13
Road numbers:  980–992

Railroad:  Erie Railroad
Quantity:  6
Road numbers:  1260–1265

Railroad:  Ferrocarriles Nacionales de México (NdeM)
Quantity:  10
Road numbers:  6602, 7101–7107, 7101:2, 7102:2

Railroad:  Florida East Coast Railway
Quantity:  26
Road numbers:  651–676

Railroad:  Georgia Railroad
Quantity:  3
Road numbers:  1040–1042

Railroad:  Grand Trunk Railway
Quantity:  16
Road numbers:  4442–4450, 4558-4559, 4902–4906
Notes:  Grand Trunk Railway has since rebuilt the 4900s into GP9Rs and renumbered them into the 4600s with chopped noses. Some of the 4600s have since sold, majority still reside with the CN ether in CN paint or GT paint.

Railroad:  Grand Trunk Western Railroad
Quantity:  51
Road Numbers:  1751-1767, 4134–4139, 4539–4546, 4907–4922, 4930–4933

Railroad:  Great Northern Railway
Quantity:  95
Road numbers:  656–734, 900–915
Notes:  900's are 1,350 hp (1,010 kW) GP9M. 733, 734 are 1,500 hp (1,100 kW) GP9Ms.

Railroad:  Illinois Central Railroad
Quantity:  348
Road numbers:  9000–9257, 9300–9389

Railroad:  Kansas City Southern Railway
Quantity:  4
Road numbers:  162–165
Notes:  162 is a GP9M.

Railroad:  Lehigh Valley Railroad
Quantity:  2
Road numbers:  300, 301

Railroad:  Louisville and Nashville Railroad
Quantity:  32
Road numbers:  437, 441–459, 511, 513, 515–522, 553–554
Notes:  437, 511, 513 are GP9Ms.

Railroad:  Meridian and Bigbee Railroad
Quantity:  1
Road numbers:  102

Railroad:  Midland Valley Railroad
Quantity:  2
Road numbers:  152, 153
Notes:  GP9M

Railroad:  Minneapolis and St. Louis Railway
Quantity:  23
Road numbers:  600–608, 700–713
Notes:  600's are 1,350 hp (1,010 kW) GP9M.

Railroad:  Minneapolis, St. Paul and Sault Ste. Marie Railroad (“Soo Line”)
Quantity:  24
Road numbers:  400–414, 550–558
Notes:  400's freight; 550's passenger.

Railroad:  Soo Line (Wisconsin Central Railroad)
Quantity:  21
2400–2413, 2550–2556
Notes:  2400s freight; 2550s passenger.

Railroad:  Mississippi Export Railroad
Quantity:  1
Road numbers:  60

Railroad:  Missouri Pacific Railroad
Quantity:  40
Road numbers:  4332–4371

Railroad:  New York Central Railroad
Quantity:  160
Road numbers:  5904–6028, 6041–6075

Railroad:  New York Central (Cleveland Union Terminal)
Quantity:  4
Road numbers:  5900–5903

Railroad:  New York, Chicago and St. Louis Railroad (“Nickel Plate Road”)
Quantity:  107
Road numbers:  448–534, 800–814, 448:2, 482:2, 496:2, 497:2, 503:2

Railroad:  New York, New Haven and Hartford Railroad
Quantity:  30
Road numbers:  1200–1229

Railroad:  Norfolk and Western Railway
Quantity:  306
Road numbers:  10–13, 506–521, 620–699, 714–914, 813:2, 817:2, 799:2, 800:2, 805:2

Railroad:  Northern Pacific Railway
Quantity:  176
Road numbers:  200–375
Notes:  To Burlington Northern. Some have been rebuilt to GP28 standards and are called GP28Ms.

Railroad:  Pennsylvania Railroad
Quantity:  270
Road numbers:  7000–7269

Railroad:  Phelps Dodge Corporation (Morenci Mine)
Quantity:  14
Road numbers:  30–43

Railroad:  Phelps Dodge Corporation (New Cornelia Branch Mine)
Quantity:  3
Road numbers:  21–23

Railroad:  Seaboard Air Line Railroad
Quantity:  58
Road numbers:  1798, 1801, 1900–1929, 1954–1979
Notes:  1798, 1801 are GP9Ms.

Railroad:  Southern Railway
Quantity:  2
Road numbers:  2500, 2501

Railroad:  Southern Railway (Cincinnati, New Orleans and Texas Pacific Railway
Quantity:  5
Road numbers:  6245–6249

Railroad:  Southern Railway (Georgia Southern and Florida Railway)
Quantity:  2
Road numbers:  8214, 8215

Railroad:  Southern Railway (Live Oak, Perry and Gulf Railroad)
Quantity:  2
Road numbers:  302, 303

Railroad:  Southern Railway (New Orleans and Northeastern Railroad)
Quantity:  2
Road numbers:  6898, 6899

Railroad:  Southern Pacific Company
Quantity:  255
Road numbers:  5600–5719, 5730–5844, 5872–5891
Notes:  5872 - 5891 built with low-short-hoods.

Railroad:  Southern Pacific (Texas and New Orleans Railroad)
Quantity:  73
Road numbers:  240–249, 280–283, 400–458

Railroad:  Southern Peru Copper Corporation
Quantity:  4
Road numbers:  20–23

Railroad:  Spokane, Portland and Seattle Railway
Quantity:  6
Road numbers:  150–155
Notes:  150-153 had steam boilers; to BN 1975-1980.

Railroad:  St. Louis Southwestern Railway (“Cotton Belt”)
Quantity:  12
Road numbers:  820–831

Railroad:  Texas and Pacific Railway
Quantity:  14
Road numbers:  1131–1144

Railroad:  Texas Mexican Railway (Tex-Mex)
Quantity:  1
Road numbers:  853

Railroad:  Union Pacific Railroad
Quantity:  219
Road numbers:  130–248, 250–349

Railroad:  Venezuelan National Railways
Quantity:  6
Road numbers:  001–006

Railroad:  Wabash Railroad
Quantity:  12
Road numbers:  484, 495

Railroad:  Western Maryland Railway
Quantity:  20
Road numbers:  25–32,34-45
Notes:  All custom fitted with low short hood at Hagerstown shops. EMD demo 7257 became WM 33.

Railroad:  Western Pacific Railroad
Quantity:  8
Road numbers:  725–732

Railroad:  Western Railway of Alabama
Quantity:  2
Road numbers:  530, 531

Railroad:  Winston-Salem Southbound Railway
Quantity:  4
Road numbers:  1501–1504
Notes:  2 to Norfolk and Western Railway, 2 to Atlantic Coast Line Railroad.

Total: 3,466

GP9 locomotives built by General Motors Diesel, Canada

Railroad:  Algoma Central Railway
Quantity:  2
Road numbers:  171–172
Notes:  Last GP9's built; 172 to Essex Terminal 102 in 1986 and chop-nosed.

Railroad:  Canadian National Railways
Quantity:  349
Road numbers:  1724–1750, 2000–2024, 4100–4133, 4147–4156, 4228–4353, 4476–4538, 4560–4609, 4588–4601:2

Railroad:  Canadian Pacific Railway
Quantity:  200
Road numbers:  8483–8546, 8611–8708, 8801–8823, 8825-8839

Railroad:  Quebec Cartier Mining
Quantity:  9
Road numbers:  1–9
Notes:  Built with low-short-hoods. Renumbered to 51-59. 59 to Essex Terminal 108 in 1989.

Railroad:  Midland Railway Company of Manitoba
Quantity:  1
Road numbers:  2
Notes:  to Burlington Northern Manitoba Limited 2, then BNSF 1685.

Railroad:  New York Central Railroad
Quantity:  12
Road numbers:  6029–6040

Railroad:  Northern Alberta Railways
Quantity:  10
Road numbers:  201–210

Railroad:  Ontario Northland Railway
Quantity:  6
Road numbers:  1600–1605

Railroad:  Quebec North Shore and Labrador Railway
Quantity:  54
Road numbers:  124–177

Railroad:  Toronto, Hamilton and Buffalo Railway
Quantity:  3
Road numbers:  401–403

Total: 646

GP9B locomotives built by Electro-Motive Division, USA

Railroad:  Pennsylvania Railroad
Quantity:  40
Road numbers:  7175B–7204B, 7230B–7239B

Railroad:  Union Pacific Railroad
Quantity:  125
Road numbers:  130B–204B, 300B–349B

Total B Units: 165

Preservation
Several GP9 locomotives have been preserved at various railroad museums and as "park engines." The Western Pacific Railroad Museum at Portola, California rosters three of these units: Western Pacific Railroad 725 and 731, as well as Southern Pacific Railroad 2873, still painted in the Southern Pacific Santa Fe Railroad merger scheme. SP 2873 is a popular locomotive in the museum's Run a Locomotive program. There is also one on display at the Horseshoe Curve, Pennsylvania Railroad No. 7048. No. 7048 replaced K4s Pacific No. 1361 which in 1986 was removed from the site and rebuilt to haul excursion trains.

Current operators
The Northwestern Pacific Railroad rosters an ex-Burlington Northern GP9, now in the NWP's "Bloody Nose" paint scheme, for mainly switching and MOW operations in Northern California. The Buffalo & Pittsburgh Railroad operates a former N&W GP9, now numbered 626. Its home yard is the Bradford, PA yard. The California Western Railroad, better known as the "Skunk Train," has three GP9s in their fleet. The Santa Maria Valley Railroad operates a former Milwaukee Road GP9 numbered 1801.

In the mid 1980s to early 1990s Guilford Rail System (now Pan Am Railways) started painting and renumbering their GP9 fleet into the Guilford Transportation scheme with the Springfield Terminal name on the side. Pan Am Railways still rosters 6 of the 50 GP9s that are left, the rest either having been scrapped or sold. The last 6 GP9s still rostered on PAR are 51, 52, 62, 71, 72, and 77. The 77 was painted into the Boston and Maine maroon and gold "Minuteman" scheme for Pan Am's heritage fleet, and the 52 was painted in the Maine Central green scheme.

The Hartwell Railroad operates former Chicago and North Western GP9 4556, née Chicago, Rock Island and Pacific 1315.

The Vintage Locomotive Society currently operates two GP9 locomotives: No. 4138 was built by General Motors Diesel (GMD) in November 1958 for the Grand Trunk Western (which eventually became part of Canadian National Railway). It was donated by CN to the Society in August 2002. 4138 is used on the Prairie Dog Central Railway in regular service and in some charter service. It acts as backup power should steam locomotive No. 3 be unavailable. No. 1685 was built by General Motors Diesel (GMD) in March 1957 for the Midland Railway Company of Manitoba as locomotive No. 2 (which became Burlington Northern Manitoba Limited No. 2, then BNSF No. 1685). It was donated to the Society by BNSF in July 2010. 1685 is used on the Prairie Dog Central Railway in regular service and in some charter service. It also acts as backup power should steam locomotive No. 3 or 4138 be unavailable.

CN still has a strong fleet of GP9 locomotives in service, designated as GP9RM, which were rebuilt in the 1980s. They use the following number series: 4000s, 4100s, 7000s, and 7200s.

Other operators include:

Butte, Anaconda and Pacific Railway
Central Montana Rail (ex. Great Northern, still operate high nose, long-hood forward)
Montana Rail Link
Montreal, Maine and Atlantic Railway - ex-Bangor and Aroostook Railroad and ex-Canadian Pacific Railway
Adrian & Blissfield Railroad
Leadville, Colorado and Southern Railroad
Ontario Northland Railway
Grafton & Upton Railroad
Essex Terminal Railway (ETL)

EMD GP9 Overview
Type and origin
Power type: Diesel-electric
Builder: General Motors Electro-Motive Division (EMD), General Motors Diesel (GMD)
Build date: January 1954 – August 1963
Total produced: 4,112 (and 165 B units)
Specifications
AAR wheel arrangement: B-B
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
5 ft 3 in (1,600 mm) (Brazil)
Trucks: EMD Bloomberg B (Flexicoil on some CN units)
Wheel diameter: 40 in (1.016 m)
Minimum curve 21° (273 ft (83.21 m) radius)
Wheelbase: 40 ft (12.19 m)
Length: 56 ft 2 in (17.12 m)
Width: 10 ft 3 1⁄2 in (3.14 m)
Height: 15 ft 1⁄2 in (4.58 m)
Locomotive weight: 259,500 lb (117,700 kg)
Fuel capacity: 1,100 US gal (4,200 l; 920 imp gal)
Prime mover: EMD 567C
RPM range: 835 max
Engine type: V16 Two-stroke diesel
Aspiration: Roots-type supercharger
Displacement: 9,072 cu in (148.66 L)
Generator: EMD D-12-B
Traction motors: (4) EMD D-37-B
Cylinders: 16
Cylinder size: 8 1⁄2 in × 10 in (216 mm × 254 mm)
Performance figures
Power output: 1,750 hp (1.30 MW)
Tractive effort: 64,750 lbf (288.0 kN)
Career
Locale: North America, South America

See also:

EMD Diesel Locomotives

Diesel Electric Locomotives

Electro-Motive Diesel