1. Home
  2.  ›
  3. Diesel Locomotives
  4.  ›
  5. Montreal Locomotive Works

Montreal Locomotive Works: Location, Production, History

Last revised: August 26, 2024

By: Adam Burns

The Montreal Locomotive Works, often referred to by its initials as MLW, was a long-established manufacturer of locomotives dating back to the late 19th century. 

During the early 20th century the newly formed American Locomotive Company (Alco) acquired MLW's predecessor as a means of opening new possibilities in the Canadian market. 

Over the years MLW became a formidable builder, manufacturing at least one locomotive for most of the country's largest railroads. 

During the diesel era Alco's northern arm continued to supply Canada with models inspired by its parent's designs, slightly modified for use in that country. 

Interestingly, many MLW products remained in use long after most of its parents equipment had been retired from American lines.  During the 1980s MLW was purchased by Bombardier and its name was soon dissolved.

Photos

Canadian Pacific RS18 #8787 was photographed here at Agincourt Yard in Toronto on September 7, 1980. B. Ottaway photo. American-Rails.com collection.

History

The Montreal Locomotive Works began as the Locomotive & Machine Company of Montreal, which was established in 1883 and began producing steam locomotives for several Canadian railroads. 

During this time American manufacturers were mostly cutoff from offering their products in Canada since tariffs were in place to protect the country's locomotive builders against foreign competition. 

However, some American builders circumvented this by outright purchasing these companies, thereby having their own presence in the country (this was particularly true during the diesel era).  The American Locomotive Company (Alco) was one such builder to do this. 

It was formed in 1901 through the merger of several small manufacturers including:

  • Dickson Manufacturing Company
  • Brooks Locomotive Works
  • Cooke Locomotive & Machine Works
  • Schenectady Locomotive Works
  • Manchester Locomotive Works
  • Richmond Locomotive Works
  • Pittsburgh Locomotive & Car Works
  • Rhode Island Locomotive Works

Location

Alco's primary plant was based in Schenectady, New York and it acquired the Locomotive & Machine Company of Montreal in 1904 to reach Canadian customers such as Canadian National, Canadian Pacific, Grand Trunk, and others.   The company was quite new when Alco acquired the property having only been in the locomotive manufacturing since 1902.

Canadian National 4-8-2 #6060 (U-1-f), a 1944 product of Montreal, leads an eastbound excursion through Upton, Quebec on September 15, 1973. Carl Sturner photo. American-Rails.com collection.

Steam Locomotives

Alco later renamed its new subsidiary as the Montreal Locomotive Works, Ltd. (MLW) in 1908.  Between both manufacturers, Alco and MLW became major suppliers of steam locomotives in their respective countries. This was especially the case for the MLW after 1920, which contracted to build locomotives for CN through World War II. 

Additionally, during the war years the company constructed equipment for the Allies.  Overall, prior to the transition to diesels MLW was a very profitable arm of Alco since it supplied so much of Canada's railroads with locomotives.

Canadian National 4-8-4 #6212 (manufactured by MLW in 1943) approaches the junction at Cantic, Quebec during the 1950s. Philip Hastings photo. American-Rails.com collection.

This changed, of course, when Electro-Motive successfully demonstrated to the North American railroad industry that diesels, through its FT cab model, were a cheaper and more efficient means of motive power. 

During 1949 EMD formed General Motors Diesel, Ltd. to serve the Canadian market (a year later the Canadian Locomotive Company was acquired by Fairbanks Morse, a newcomer to locomotive manufacturing, for the same purpose). 

Diesel Locomotives

While these new competitors gave MLW significant and growing competition in its home country the builder had actually been producing diesels since Alco released its S series switchers in 1940 beginning with the S1.  After World War II it also began building road-switchers in the form of the RS2 and the FA cab model after 1950.

Interestingly enough, Canadian railroads seemed to take a greater interest in Alco-inspired products built by the Montreal Locomotive Works than American lines. 

For instance, several models released in the Road Switcher (RS) series were only available in Canada including the RS10, RS18, RSC13, RSD17, and RSC24.  Additionally, the FA design was particularly well-liked. 

Alco stopped cataloging it domestically in the U.S. after 1953 due both to EMD's stronghold on the market through its F series as well as the result of the failed 244 prime mover that caused many railroads to lose faith in the manufacturer. 

However, MLW continued to produce a passenger version, the FPA4 for CN through the late 1950s (and which remained in service until the 1980s).

Overview

Genesis
Locomotive & Machine Company of Montreal, Ltd. (1883)
Formation
1902 (Montreal Locomotive Works, Ltd.)
Headquarters
Montreal, Quebec (1505 Dickson Street)
Dates of Operation
1883 - June 22, 1978*
Diesel Models Produced
S-2, S-3, S-4, S-7, S-10, S-11, S-12, S-13, FA-1, FB-1, FA-2, FB-2, FPA-2, FPB-2, FPA-4, FPB-4, RS-1, RS-2, RS-3, RSC-3, RS-10, RS-10-S, RS-11, RSD-12, RS-13, RSD-17, RS-18, RS-23, RS-24, RS-37, C-424, M-630, M-636, M-640
Total Diesels Produced
1,737 (excluding exports)
Most Successful Diesel Model
RS18 (351)
Final Diesel Model
M-640 (March, 1971)

* Following the closure of Alco's primary manufacturing facility in Schenectady, New York the builder transferred some key personnel, along with company designs, to Montreal in the fall of 1969.

By this point the company was known as MLW-Worthington, a name it had carried since December, 1964 when parent American Locomotive was acquired by Studebaker-Worthington, Inc. 

MLW-Worthington continued to design and build locomotives throughout the 1970s until June 23, 1978 when new owner Les Entreprises de J. Armand Bombardier, Ltd. of Valcourt, Quebec (which had acquired MLW Worthington, Ltd. in 1975) dropped the MLW name to become simply Bombardier Incorporated, Rail and Diesel Products Division.  Locomotives continued to be produced at the Montreal plant with Alco/MLW lineage until 1985.

During 1963 Alco dropped its RS series for the new Century models starting with the C420.  Only one four-axle and one six-axle model was sold by the Montreal Locomotive Works, the C424 and C630M purchased by both CN and CP (Pacific Great Eastern also ordered four examples of the latter). 

Bombardier Acquisition

After Alco stopped producing locomotives in December, 1968, MLW acquired all of its parents designs and continued to operate independently.  From 1970 through 1980 it produced its own line of what were essentially Century models, slightly renamed; the M424, M420, M640, M630, and M636. 

MLW's independence did not last long, though, as Quebec-based Bombardier Inc. purchased a majority interest in the company to expand its reach into the locomotive market.

Diesel Models

S Series

Model Type Units Built Date Built Horsepower
S-111941660
S-21141943-19491,000
S-31631950-1957660
S-41501949-19571,000
S-72919571,000
S-10131957-1958660
S-11101959600
S-121119581,000
S-13561958-19671,000

RS Series

Model Type Units Built Date Built Horsepower
RS-2151947-19501,500
RS-3981951-19551,600
RS-3981951-19551,600
RS-10/S1281955-19571,600
RS-111519561,800
RS-183531957-19681,800
RS-23311959-19601,000
RSC-381951-19521,600
RSC-13351955-19591,000
RSD-171 (Nicknamed "The Empress of Agincourt")19572,400
RSC-24419591,400

FA Series

Model Type Units Built Date Built Horsepower
FA-12819501,500
FB-12019501,500
FA-2281951-19531,600
FB-2211951-19531,600
FPA-2131953-19551,600
FPB-281953-19551,600
FPA-4341958-19591,800
FPB-4121958-19591,800

Century Series

Model Type Units Built Date Built Horsepower
C-424991963-19672,400
C-630M561967-19693,000
M-420/W/B/R/TR/TR-21921972-19762,000
M-424721980-19812,400
M-640119714,000
M-630291969-19703,000
M-636641969-19703,600
VIA Rail FPA-4 #6779 receives some attention in Moncton, New Brunswick July of 1986. This unit was built by MLW as Canadian National #6779 in March, 1959. American-Rails.com collection.

In 1979, Bombardier shed the Montreal Locomotive Works name and began offering, somewhat unsuccessfully, its own line of road-switchers. 

However, by 1985 it ceased production altogether and turned its attention to producing equipment for the passenger/commuter rail market.  The company no longer needed the old MLW plant, which it sold to General Electric in 1988. 

GE continued to use the facility for a few years to rebuild and overhaul some of its early road-switchers but had no further use for the plant by 1993. 

Ten years later the complex was razed entirely during 2004.   Ironically, today Bombardier has returned to building locomotives for the commuter rail sector with plants in Quebec, Ontario, and New York.  

Recent Articles

  1. CPKC Asks the STB to End the Union Pacific-Norfolk Southern Review

    Nov 01, 26 12:23 AM

    cpkc-4805.jpg
    CPKC on October 30, 2026 asked the Surface Transportation Board to end its review of the Union Pacific-Norfolk Southern merger, citing remarks by the Union Pacific chief executive.

    Read More

  2. U.S. Rail Traffic Rose 7.8 Percent in the Week Ending October 24

    Nov 01, 26 12:13 AM

    wnyp-franklin-fall-dk.jpg
    U.S. railroads moved 538,503 carloads and intermodal units in the week ending October 24, 2026, up 7.8 percent from a year earlier, the Association of American Railroads said.

    Read More

  3. Schneider Will Shift Its Eastern Intermodal Freight to NS

    Nov 01, 26 12:06 AM

    ns-217-bluefield.jpg
    Schneider said October 29, 2026 that Norfolk Southern will be its primary eastern railroad. The move from CSX begins next month, with official implementation on January 1.

    Read More

  4. Union Pacific Dispatchers Will Vote on ATDA Representation

    Nov 01, 26 12:00 AM

    up-barstow-ll.jpg
    The National Mediation Board has authorized a representation election for Union Pacific train dispatchers. The American Train Dispatchers Association announced the decision on October 29, 2026.

    Read More

  5. Wabash Diesel Roster (All-Time)

    Oct 31, 26 12:35 AM

    28374236529735892362689389708.jpg
    Wabash diesel locomotives, each frame once, through the lease at 12:01 a.m. on October 16, 1964.

    Read More

  6. Wabash Steam Roster (Built Since 1900)

    Oct 31, 26 12:30 AM

    67o10293172461y242795086260970978.jpg
    Wabash steam locomotives built since 1900. Moguls, Mikados, Mountains, and the O-1 Northerns.

    Read More

  7. Wabash Railroad: Map, Rosters, History, Logo

    Oct 31, 26 12:28 AM

    91287365123512534162471587189569.jpg
    History of the Wabash Railroad, from the Northern Cross of 1838 to the Norfolk & Western lease at 12:01 a.m. on October 16, 1964. Follow the Flag. Steam and diesel rosters are separate pages.

    Read More

  8. Court Clears $257.7 Million in Notes for Brightline Florida

    Oct 31, 26 12:18 AM

    brightline-delray-dk.jpg
    A New Jersey bankruptcy court on October 29, 2026 authorized $257.7 million in notes for Brightline Trains Florida. The operating company is not one of the 17 debtor holding companies.

    Read More

  9. Brightline West Still Waiting on a $6 Billion Federal Loan

    Oct 31, 26 12:11 AM

    brightilne-west-media.jpg
    Brightline West said October 27, 2026 that it is still working through a $6 billion federal loan and still talks about opening in 2029. The Florida restructuring is a separate company.

    Read More

  10. BNSF Reopens the Gallup Subdivision After New Mexico Flooding

    Oct 31, 26 12:06 AM

    bnsf-reopen-gallup.jpg
    BNSF said October 28, 2026 that both Gallup Subdivision main tracks are back after flooding near Laguna, New Mexico. The El Paso Subdivision was still out of service.

    Read More

  11. CSX Says Interchange Is Moving Again After a Technology Outage

    Oct 31, 26 12:01 AM

    csx-rabbit-2021-rb.jpg
    CSX said October 29, 2026 that interchange with other Class I railroads is moving again after a technology outage that began October 27. Dispatching and positive train control stayed up.

    Read More

  12. Baldwin "Baby Face" Locomotives: Specs, Photos, Roster

    Oct 30, 26 11:01 PM

    nyc-dr441500-3401.jpg
    Baldwin's Babyface cab on the early road diesels: 50 short-cab units, 1946-1948, plus the related Centipede. Construction numbers, specs, and the sharknose that followed.

    Read More

  13. California High-Speed Rail Chief Resigns

    Oct 30, 26 08:36 PM

    san-joq-bridge.jpg
    Ian Choudri resigned October 28, 2026 as chief executive of the California High-Speed Rail Authority. The board named Joe Stephenshaw interim chief executive.

    Read More

  14. The 1910 Portal Bridge Is Handed Over for Demolition

    Oct 30, 26 04:03 PM

    portal-bridge-demo.jpg
    Amtrak handed the 1910 Portal Bridge over for demolition on October 29, 2026, during the final cutover to Portal North. Regular NJ Transit and Amtrak schedules are expected November 15.

    Read More

  15. Union Pacific-Norfolk Southern Merger Review Runs to 2027

    Oct 30, 26 03:59 PM

    up-7663-rb.jpg
    Union Pacific says the Surface Transportation Board's review of the Norfolk Southern merger gathers information through May 28, 2027. A closing still depends on board approval.

    Read More

  16. Amtrak Board Will Hear Restructuring Comments on November 10

    Oct 30, 26 03:41 PM

    amtrk-trn-371-rb.jpg
    Amtrak's board will hear public comments on its restructuring on November 10, 2026, from 2 to 3 p.m. Eastern. Written comments were due October 30. A proposal goes to the board in December.

    Read More

  17. Canadian Pacific Selkirk 5931 Restored in Calgary

    Oct 30, 26 01:36 PM

    cp-5931-palliser.jpg
    Heritage Park in Calgary unveiled a cosmetic restoration of Canadian Pacific 2-10-4 No. 5931 on October 27, 2026. One of two surviving Selkirks. It stays on display.

    Read More

  18. Gettysburg Railway to Host Steam for Lincoln

    Oct 30, 26 01:18 PM

    440-york-17-jw.jpg
    Northern Central Railway of York No. 17 will recreate Lincoln's arrival at Gettysburg on November 18, 2026, with public steam trips November 19-21.

    Read More

  19. NC&StL No. 576 to Steam for the Public in Nashville

    Oct 30, 26 01:00 PM

    ncstl-484-576-alco.jpg
    Nashville Steam will fire NC&StL 4-8-4 No. 576 for the public on November 7, 2026, 9 a.m. to 3 p.m., at 220 Willow Street. Admission is free.

    Read More

  20. Pennsylvania Railroad E8s Join the T1 Trust

    Oct 30, 26 12:38 PM

    prr-e8-5761.jpg
    The T1 Trust has acquired former Pennsylvania Railroad E8A diesels 5702A and 5761A from the Fort Wayne Railroad Historical Society. They are bound for Cumberland.

    Read More

  21. Ligonier Valley Railroad: History, Roster, Timetable

    Oct 30, 26 12:03 PM

    ligonier-280-594.jpg
    The Ligonier Valley Railroad ran 10.5 miles from Latrobe to Ligonier, Pennsylvania. Opened December 1, 1877. Last day August 31, 1952.

    Read More

  22. Toledo, Peoria & Western Diesel Roster (All-Time)

    Oct 30, 26 10:25 AM

    47211399_2027303127561614_7742391129064079360_n.jpg
    Toledo, Peoria & Western diesel locomotives, each frame once. Thirteen Alcos, three Lima-Hamilton switchers, and 26 Electro-Motive units.

    Read More

  23. Toledo, Peoria & Western Steam Roster

    Oct 30, 26 09:14 AM

    tpw-280-10.jpg
    Toledo, Peoria & Western steam locomotives from the Rogers Consolidations of 1895 through the 4-8-4s of 1937

    Read More

  24. Toledo, Peoria & Western Railway: Map, Roster, History

    Oct 29, 26 11:12 PM

    28023048283766152h1j2860287098.jpg
    History of the Toledo, Peoria & Western. The Peoria & Oquawka, George P. McNear, the Santa Fe and Pennsylvania years, and the railroad that came back in 1989.

    Read More

  25. Cotton Belt Diesel Roster (All-Time)

    Oct 29, 26 07:58 PM

    12419291241256456126172538656.jpg
    St. Louis Southwestern diesel locomotives, each frame once. Baldwin switchers, F units, and new Cotton Belt-lettered power through the GP60s of May 1990.

    Read More

  26. Cotton Belt Steam Roster (Built Since 1900)

    Oct 29, 26 06:52 PM

    ssw-484-805.jpg
    St. Louis Southwestern steam locomotives built since 1900. Consolidations, Ten-Wheelers, and twenty class L-1 4-8-4s. The quantity column is 297.

    Read More

  27. Cotton Belt Railroad: Map, Logo, History, Rosters

    Oct 29, 26 10:56 AM

    663988500itcnvhgfjwo94857593.jpg
    History of the St. Louis Southwestern, the Cotton Belt Route. The Tyler Tap, Paramore's silver spike, the Thebes Bridge, the Blue Streak, and Southern Pacific control. Steam and diesel rosters are sep…

    Read More

  28. Pere Marquette Steam Roster (Built Since 1900)

    Oct 28, 26 11:54 PM

    1222109095utgklpop0597573892.jpg
    Pere Marquette steam locomotives built since 1900. Consolidations, Mikados, Pacifics, and 39 Berkshires. The quantity column is 503.

    Read More

  29. Pere Marquette Diesel Roster (All-Time)

    Oct 28, 26 11:48 PM

    9127348142681257926859027.jpg
    Pere Marquette diesel locomotives, each frame once. Two SW1s, 14 NW2s, three GE 70-tonners, eight E7As, and six BL2s delivered lettered Chesapeake and Ohio. The quantity column is 33.

    Read More

  30. Pere Marquette Railway: Map, Logo, Rosters, History

    Oct 28, 26 11:44 PM

    1010580949utbnnjotop959180993726ye.jpg
    History of the Pere Marquette Railway. Timber roads, the Prince years, the Van Sweringens, the Ludington car ferries, and the Chesapeake and Ohio merger of June 6, 1947.

    Read More

  31. Nickel Plate Road (Railroad): Map, History, Rosters

    Oct 28, 26 10:51 PM

    19058nkplpe870598u1yiu09085.jpg
    History of the Nickel Plate Road, the New York, Chicago and St. Louis. The Seney syndicate, the Van Sweringens, the Berkshires, and the Norfolk and Western absorption at 12:01 a.m. on October 16, 1964…

    Read More

  32. Nickel Plate Diesel Roster (All-Time)

    Oct 28, 26 10:48 PM

    q3958712571285236892368937904890.jpg
    Nickel Plate diesel locomotives, each frame once. Alco switchers and PAs, GP7s and GP9s, and the GP30s. The quantity column is 440. The 1950 fleet was 117.

    Read More

  33. Nickel Plate Steam Roster (Built Since 1900)

    Oct 28, 26 10:43 PM

    92384127461234727352786898398788.jpg
    Nickel Plate steam locomotives built since 1900, including the Lake Erie and Western, the Clover Leaf, and the Wheeling engines that took Nickel Plate numbers. The quantity column is 786.

    Read More

  34. EMD "E9" Locomotives: Specs, Roster, History

    Oct 28, 26 10:37 PM

    GMS4VzFXYAA3SBB.jpg
    EMD E9 cab units and boosters, 2,400 horsepower, built April 1954 through January 1964. Gear ratios, specifications, and the production roster by owner, serial, and order.

    Read More

  35. NYC 4-6-4 #5344, "Commodore Vanderbilt"

    Oct 28, 26 04:31 PM

    GK2FP3jXYAIVQpd.jpg
    NYC J-1e Hudson 5344, the Commodore Vanderbilt. Alco, November 1931. Carl Kantola’s shroud, December 1934, then a Dreyfuss bullet nose in 1939. Scrapped at Collinwood in 1954.

    Read More

  36. New Jersey, Indiana & Illinois Railroad: A South Bend Shortline

    Oct 28, 26 11:05 AM

    njii-nw2-2.jpg
    The New Jersey, Indiana & Illinois, the Jersey Line, ran from South Bend to Pine. Singer built it in 1905. Wabash stock control came in 1926. Two diesels, and the steam the record names.

    Read More

  37. Monon Diesel Roster (All-Time)

    Oct 28, 26 10:13 AM

    monon-f3s-emd.jpg
    Monon diesel locomotives, each frame once. F3s, nine BL2s, the C420s, and eight U23Bs. The quantity column is 96. The 1951 fleet was 57.

    Read More

  38. Monon Steam Roster (Built Since 1900)

    Oct 28, 26 10:09 AM

    monon-280-271.jpg
    Monon steam locomotives built since 1900. Twelve-Wheelers, Mikados, light Pacifics, and thirteen six-wheel switchers. The quantity column is 148.

    Read More

  39. Monon Railroad: Map, Photos, History, Logo

    Oct 28, 26 09:55 AM

    36386222_1923855317906396_2801775267905798144_n.jpg
    History of the Monon, the Hoosier Line. The New Albany & Salem, the X at Monon, Barriger's streamliners, and the Louisville & Nashville merger of July 31, 1971.

    Read More

  40. Missouri-Kansas-Texas Diesel Roster (All-Time)

    Oct 28, 26 09:48 AM

    83052935482357348683093748-090.jpg
    All-time diesel roster of the Missouri-Kansas-Texas. 406 locomotives, each frame once. Baldwin switchers, Alco cab units, F units, Geeps, and the SD40-2s.

    Read More

  41. Missouri-Kansas-Texas Steam Roster (Built Since 1900)

    Oct 28, 26 09:43 AM

    mkt-080-53.jpg
    Missouri-Kansas-Texas steam locomotives built since 1900. Moguls, Mikados, Pacifics, and the narrow-gauge shop tanks. The quantity column is 715.

    Read More

  42. Missouri-Kansas-Texas Railroad (Katy): Map, History, Rosters

    Oct 27, 26 11:02 PM

    69001098676156172u2u789800997.jpg
    History of the Missouri-Kansas-Texas, the Katy. The race into Indian Territory, Gould, the 1923 railroad, the Texas Special, and the 1988 sale. Steam and diesel rosters are linked.

    Read More

  43. Soo Line Diesel Roster (All-Time)

    Oct 27, 26 10:55 PM

    1098241824672157826892097.jpg
    All-time diesel roster of the Soo Line and the Wisconsin Central. 786 locomotives, each frame once. Cab units, Geeps, the Milwaukee Road engines, and the SD60s. The South Shore's 24 stay on that page.

    Read More

  44. Soo Line Steam Roster (Built Since 1900)

    Oct 27, 26 10:49 PM

    soo-210-950.jpg
    Soo Line and Wisconsin Central steam locomotives built since 1900. Consolidations, Mikados, Pacifics, 21 Mountains, and four Lima 4-8-4s.

    Read More

  45. Soo Line Railroad: Map, Logo, History, Rosters

    Oct 27, 26 10:24 PM

    298568734723757863894978090798.jpg
    The Soo Line, from the flour millers' railroad around Chicago to the Sault, the Wisconsin Central, and the Milwaukee Road. Steam quantity 422. Diesels 786. Canadian Pacific took full control in 1990.

    Read More

  46. Minneapolis, Northfield and Southern Railway: Map, History, Rosters

    Oct 27, 26 10:32 AM

    23lj8500dsyqo85081094iu7757835.jpg
    The Minneapolis, Northfield & Southern, the Dan Patch Line that became a Twin Cities belt. Steam, gas-electric mules, motor cars, and the 22 diesels, through the Soo Line.

    Read More

  47. Minneapolis & St. Louis Diesel Roster (All-Time)

    Oct 27, 26 10:27 AM

    129128712461556.jpg
    All-time diesel roster of the Minneapolis & St. Louis. 97 locomotives, each frame once. Switchers from 1938, 35 RS-1s, the FT and F-unit cabs, two SD7s, and 23 GP9s. Builder numbers included.

    Read More

  48. Minneapolis & St. Louis Steam Roster (Post 1900)

    Oct 27, 26 10:25 AM

    mstl-282-634.jpg
    Minneapolis & St. Louis steam locomotives built since 1900. Moguls, Consolidations, 35 Mikados, and five Pacifics.

    Read More

  49. Minneapolis and St Louis Railway: "The Peoria Gateway"

    Oct 27, 26 09:52 AM

    o83237527836982689390739070948.jpg
    The Minneapolis & St. Louis, the Tootin' Louie, from the 1870 charter to the Peoria Gateway and the Chicago & North Western sale on November 1, 1960.

    Read More

  50. Alco "PA" Locomotives: Restoration, Specs, Engine, Rosters

    Oct 27, 26 12:12 AM

    2374283752368572683475309748.jpg
    Alco's PA passenger cab, 297 locomotives built from 1946 to 1953. The 244 engine, the production roster, the Delaware & Hudson PA-4s, and Nickel Plate Road 190.

    Read More