1. Home
  2.  ›
  3. Diesel Locomotives
  4.  ›
  5. Morrison-Knudsen Corporation

Morrison-Knudsen Locomotives: Rebuilds, History, Photos

Last revised: November 7, 2024

By: Adam Burns

The Morrison-Knudsen Corporation was not normally associated with the railroad industry.  For years the company, based in Idaho, had been involved in construction and engineering where it made its fortunes after being incorporated during the early 20th century. 

It was only during the early 1970s that M-K began rebuilding locomotives through a new subsidiary and over the years it became more well-known for the quality of its work, outshopping hundreds of Electro-Motive products, and those of other builders, that even sported a custom paint scheme. 

During the late 1980s under the direction of an ambitious CEO, M-K began branching out into the light-rail transit/commuter rail market with the hope of manufacturing passenger cars and even locomotives intended for freight service.  

However, these efforts fell apart resulting in the CEO ousted, the company falling into bankruptcy, and eventually being dissolved after it was acquired by another corporation. 

The company's fate is truly unfortunate considering it was a successful locomotive re-builder which many railroads and organizations turned to  by extending the service lives of units which would have otherwise been scrapped.

Photos

Morrison-Knudsen TE50-4S #5001 at Suquamish, Washington in October, 1981. This unit was built as Union Pacific GP9 #278 in September, 1954. It was sold to MK in February, 1979 and subsequently rebuilt with a Sulzer six-cylinder, model 6ASL25/30 marine diesel engine which could produce 1,500 horsepower. It was later sold to Morristown & Erie as #22. American-Rails.com collection.

History

For much of its time as an operating business the name Morrison-Knudsen described a company in the civil engineering and construction field. 

It began as a collaboration between Harry Morrison and Morris Knudsen in 1905 both of which had years of experience in the construction industry. 

Their first contract did not generate much income but as they slowly improved their craft, soon their company was involved in numerous projects such as dams (notably the Hoover Dam), military projects during World War II, roads, and even new railroad lines. 

Morrison-Knudsen entered the engineering field when it formed International Engineering Company, Inc. after 1950 to aid in the completion of public works projects outside of the United States.

William H. McMurren

When William H. McMurren became M-K's president and CEO in 1970 the company finally entered the railroad business, opening the Rail Systems Group (RSG) subsidiary in Boise, Idaho during 1972. 

Under McMurren's direction Morrison-Knudsen saw significant growth where it branched out into several other fields such as mining, real estate, manufacturing, and shipbuilding. 

Its RSG division worked quietly throughout the 1970s and 1980s rebuilding locomotives for prolonged service, mostly sticking with Electro-Motive equipment such as first and second-generation General Purpose models. 

Wabash Valley Railroad

During this time Morrison-Knudsen also briefly got into the actual railroad business, operating the Wabash Valley Railroad from 1977 through 1981.

Morrison-Knudsen SD40M-2 #9046 (ex-Kansas City Southern SD40 #634) and LMX Leasing B39-8E #8558 lead containers eastbound on Norfolk Southern at Holland, Ohio during a June evening in 1995. American-Rails.com collection.

The WV used rebuilt M-K Geeps and operated a former Pennsylvania Railroad branch between Decatur and Paris, Illinois.  It gave up after state funding disappeared and another new startup also quite running the line after a few years (it was abandoned in 1984). 

Rebuilds

During its years of rebuilding locomotives RSG earned quite a reputation for the quality of its work outshopping everything from GP7s, GP40s, and U30Bs to SD40s, SD40-2s, SD45s, and C30-7s (even a few late-model Alcos were rebuilt) that could be seen all across the country. 

One could easily distinguish their equipment, which featured a unique yellow and black paint scheme with a large, stylized "MK" on the long hood and accompanying wide pinstripe (later, the livery was changed to a deep blue with a gold pinstripe and "Morrison-Kudsen" spelled out on the hood).

A pair of Southern Pacific's experimental 2,800-horsepower TE70-4S units, circa 1983. There were four of these locomotives (7030–7033) manufactured by Morrison-Knudsen in 1977-1978 from former U25Bs, equipped with Sulzer (Switzerland) prime movers. The concept wasn't successful and the units were sold in 1987. Mike Bledsoe photo. American-Rails.com collection.

M-K also added their own builder plate to every locomotive completed in Boise, which featured the company's classic "MKC" logo.  After 1988 the company was headed by William J. Agee, which had his share of successes in the business world but also a number of spectacular failures as well. 

Among other endeavors, Agee felt that M-K's future lay in the railroad industry by expanding its locomotive rebuild division into full-scale production of new models.  Additionally, he believed that the United States was bound for a resurgence in passenger rail travel. 

To this end he correctly read the market as light-rail and commuter transit began growing during the late 1980s through the 1990s. 

To capture this opportunity the new CEO wanted Morrison-Knudsen to setup a rail car manufacturing facility using the old Pullman freight car plant on Chicago's far south side at 130th Street.

The new operation would supply locally operated Metra and other commuter rail services around the country with new cars. 

Aside from this venture M-K won contracts for a number of LRT projects such as (among others) the Bay Area Rapid Transit in California, Washington D.C.'s Metro subway system, and a new service connecting Honolulu, Hawaii. 

MK5000C

During 1992 M-K announced that it would also enter the locomotive production market via new subsidiary MK Rail Corporation using Caterpillar engines to power a monstrous 5,000 horsepower model known as the MK5000C. 

Things seemingly could not be better for Morrison-Knudsen as Agee appeared to have the company on a solid and successful road to the future. 

In the October 1992 issue of Trains Don Phillips wrote a four-page cover story on M-K's growing success in the railroad industry, "Morrison-Knudsen's Big Gamble:  Is Bill Agee Destined For Railroad Greatness, Or Is He Just a Flash In The Pan?

MotivePower, Inc

Unfortunately, the title of this piece turned out to be an impending omen as Agee and M-K really were just a flash in the pan.  The company extended itself too far, too quickly and did not have the infrastructure in place to complete its rail car contracts. 

Additionally, a number of its LRT and high-speed rail contracts died when public funding for the projects fell through.  By 1994 Morrison-Knudsen announced it had lost more than $300 million for the year and with creditors threatening to shut off funding Agee was ousted during February of 1995. 

After entering bankruptcy and being acquired by the Washington Construction Group, Inc. the former MK Rail division was spun-off as a separate company known as MotivePower Industries Corporation. 

Today, the facility in Boise is still in the railroad business, known as MotivePower, Inc. and is primarily focuses on manufacturing low-emissions switchers and new commuter locomotives. 

Recent Articles

  1. Indiana's Dinner Train Rides In Jasper!

    Jan 18, 26 01:54 PM

    2983412754278698899837.jpg
    In the rolling hills of southern Indiana, the Spirit of Jasper offers one of those rare attractions that feels equal parts throwback and treat-yourself night out: a classic excursion train paired with…

    Read More

  2. New Mexico's Dinner Train Rides

    Jan 18, 26 01:37 PM

    1i2u4127417254781259782152698787.jpg
    If your heart is set on clinking glasses while the desert glows at sunset, you can absolutely do that here—just know which operator offers what, and plan accordingly.

    Read More

  3. New Hampshire ~ Murder Mystery ~ Dinner Train Rides

    Jan 18, 26 01:10 PM

    18264162546158769897078.jpg
    The state's murder mystery trains stand out as a captivating blend of theatrical drama, exquisite dining, and scenic rail travel.

    Read More

  4. New York Valentine's Train Rides

    Jan 18, 26 12:32 PM

    189274671232358678678966.jpg
    At its best, the Adirondack Railroad delivers exactly what railfans and casual riders alike hope for: vintage coaches, classic depots, rivers and forests right outside the window.

    Read More

  5. Washington Valentine's Train Rides

    Jan 18, 26 10:50 AM

    5953467324_9c3c78a718_k.jpg
    Whether you’re a dedicated railfan chasing preserved equipment or a couple looking for a memorable night out, CCR&M offers a “small railroad, big experience” vibe—one that shines brightest on its spec…

    Read More

  6. Colorado Valentine's Train Rides

    Jan 18, 26 10:49 AM

    918757h2k6opo109871h24yb2u879.jpg
    The Royal Gorge Route Railroad is the kind of trip that feels tailor-made for railfans and casual travelers alike, including during Valentine's weekend.

    Read More

  7. Georgia Valentine's Train Rides

    Jan 18, 26 10:42 AM

    18241725235782686.jpg
    f you’ve ridden the SAM Shortline, it’s easy to think of it purely as a modern-day pleasure train—vintage cars, wide South Georgia skies, and a relaxed pace that feels worlds away from interstates and…

    Read More

  8. New Jersey ~ Murder Mystery ~ Dinner Train Rides

    Jan 17, 26 01:16 PM

    33669448620_d5d9603c97_k.jpg
    There are currently no murder mystery dinner trains available in New Jersey although until 2023 the Cape May Seashore Lines offered this event. Perhaps they will again soon!

    Read More

  9. West Virginia Dinner Train Rides In Elkins!

    Jan 17, 26 01:08 PM

    18924182541258726982898978.jpg
    The D&GV offers the kind of rail experience that feels purpose-built for railfans and casual travelers.

    Read More

  10. Virginia Dinner Train Rides In Staunton!

    Jan 17, 26 11:55 AM

    91287417245612268989789897.jpg
    If you’ve ever wished you could pair a classic scenic train ride with a genuinely satisfying meal—served at your table while the countryside rolls by—the Virginia Scenic Railway was built for you.

    Read More

  11. Florida Easter Train Rides

    Jan 17, 26 10:23 AM

    9876332435788976546576.jpg
    The cold weather rarely invades Florida and the state nearly always warm and balmy early spring temperatures. Learn more about where you can find Easter-themed train rides across the Sunshine State.

    Read More

  12. Ohio Easter Train Rides

    Jan 17, 26 10:13 AM

    18785261358276893977980.jpg
    Ohio is home to several museums and excursion trains preserving the state's rich railroading heritage. A few of these locations host Easter-themed train rides each spring.

    Read More

  13. Massachusetts Valentine's Train Rides

    Jan 17, 26 09:58 AM

    19278172415238237296677.jpg
    The Cape Cod Central Railroad (CCCR) blends classic New England scenery with heritage equipment, narrated sightseeing, and some of the region’s best-known “rails-and-meals” experiences.

    Read More

  14. California Valentine's Train Rides

    Jan 17, 26 09:53 AM

    97214127418751572358317988666.jpg
    Operating out of West Sacramento, this excursion railroad has built a calendar that blends scenery with experiences—wine pours, themed parties, dinner-and-entertainment outings, and seasonal specials…

    Read More

  15. South Carolina Dinner Train Rides

    Jan 16, 26 11:13 PM

    9028827358258299187268930979808.jpg
    There is only location in the Palmetto State offering a true dinner train experience can be found at the South Carolina Railroad Museum. Learn more here.

    Read More

  16. Rhode Island Dinner Train Rides

    Jan 16, 26 11:01 PM

    Despite its small size, Rhode Island is home to one popular dinner train experience where guests can enjoy the breathtaking views of Aquidneck Island.

    Read More

  17. Pennsylvania's Thomas The Train Rides

    Jan 16, 26 04:13 PM

    "A Day Out With Thomas” train rides offer a unique opportunity for children and their families to engage in a magical and memorable experience, setting the stage for a full day of fun and adventure.

    Read More

  18. Illinois's Thomas The Train Rides

    Jan 16, 26 02:23 PM

    ChatGPT Image Jan 16, 2026, 02_21_08 PM.png
    In Illinois, the "A Day Out With Thomas" event offers a unique chance for families to immerse themselves in the enchanting world of Thomas and friends, creating memories that last a lifetime.

    Read More

  19. New Jersey's Thomas The Train Rides

    Jan 16, 26 02:11 PM

    182731263412419872587267.png
    Here's a comprehensive guide to what you can expect at Day Out With Thomas events in New Jersey.

    Read More

  20. Texas ~ Murder Mystery ~ Dinner Train Rides

    Jan 16, 26 01:54 PM

    8786d323rtui8654546.jpg
    Here’s a comprehensive look into the world of murder mystery dinner trains in Texas.

    Read More

  21. Connecticut ~ Murder Mystery ~ Dinner Train Rides

    Jan 16, 26 01:26 PM

    987532789579631312434697769.jpg
    All aboard the intrigue express! One location in Connecticut typically offers a unique and thrilling experience for both locals and visitors alike, murder mystery trains.

    Read More

  22. New Hampshire Dinner Train Rides In N. Conway!

    Jan 16, 26 10:47 AM

    2937428358237827896897269866.jpg
    Tucked into the heart of New Hampshire’s Mount Washington Valley, the Conway Scenic Railroad is one of New England’s most beloved heritage railways

    Read More

  23. Oregon Dinner Train Rides Near Mt. Hood!

    Jan 16, 26 10:44 AM

    91782481258158276969866.jpg
    The Mt. Hood Railroad is the moving part of that postcard—a century-old short line that began as a working railroad.

    Read More

  24. Maryland's - Wine Tasting - Train Rides

    Jan 15, 26 02:59 PM

    53474161566_73e6bbbda2_4k.jpg
    This article delves into the enchanting world of wine tasting train experiences in Maryland, providing a detailed exploration of their offerings, history, and allure.

    Read More

  25. Colorado's - Wine Tasting - Train Rides

    Jan 15, 26 02:46 PM

    drgw_mb_geeps.jpg
    To truly savor these local flavors while soaking in the scenic beauty of Colorado, the concept of wine tasting trains has emerged, offering both locals and tourists a luxurious and immersive indulgenc…

    Read More

  26. Iowa ~ Wine Tasting ~ Train Rides

    Jan 15, 26 02:36 PM

    1928417241258723569896897.jpg
    The state not only boasts a burgeoning wine industry but also offers unique experiences such as wine by rail aboard the Boone & Scenic Valley Railroad.

    Read More

  27. Georgia's Wine Train Rides In Cordele!

    Jan 15, 26 02:26 PM

    33411540341_1601ca1dde_k.jpg
    While the railroad offers a range of themed trips throughout the year, one of its most crowd-pleasing special events is the Wine & Cheese Train—a short, scenic round trip designed to feel like a t…

    Read More

  28. Indiana ~ Murder Mystery ~ Dinner Train Rides

    Jan 15, 26 02:22 PM

    98qw754174175782689387998.jpg
    This piece explores the allure of murder mystery trains and why they are becoming a must-try experience for enthusiasts and casual travelers alike.

    Read More

  29. Ohio ~ Murder Mystery ~ Dinner Train Rides

    Jan 15, 26 02:10 PM

    54064480208_2c1c4efe08_k.jpg
    The murder mystery dinner train rides in Ohio provide an immersive experience that combines fine dining, an engaging narrative, and the beauty of Ohio's landscapes.

    Read More

  30. Nevada Dinner Train Rides In Ely!

    Jan 15, 26 02:01 PM

    16544497471_f924a19a33_k.jpg
    If you’ve ever wished you could step through a time portal into the hard-working world of a 1900s short line the Nevada Northern Railway in Ely is about as close as it gets.

    Read More

  31. Michigan Dinner Train Rides In Owosso!

    Jan 15, 26 09:46 AM

    73127461247812357132578235823698766.jpg
    The Steam Railroading Institute is best known as the home of Pere Marquette #1225 and even occasionally hosts a dinner train!

    Read More

  32. Arizona's - Wine Tasting - Train Rides

    Jan 14, 26 02:04 PM

    7834453146_9bee2c1119_o.jpg
    For those who want to experience the charm of Arizona's wine scene while embracing the romance of rail travel, wine tasting train rides offer a memorable journey through the state's picturesque landsc…

    Read More

  33. Arkansas's - Wine Tasting - Train Rides

    Jan 14, 26 01:57 PM

    921842174651267258392869896788.jpg
    This article takes you through the experience of wine tasting train rides in Arkansas, highlighting their offerings, routes, and the delightful blend of history, scenery, and flavor that makes them so…

    Read More

  34. Tennessee ~ Murder Mystery ~ Dinner Train Rides

    Jan 14, 26 01:42 PM

    8676443234543254657.jpg
    Amidst the rolling hills and scenic landscapes of Tennessee, an exhilarating and interactive experience awaits those with a taste for mystery and intrigue.

    Read More

  35. California ~ Murder Mystery ~ Dinner Train Rides

    Jan 14, 26 01:26 PM

    9753dxw454766754w3qds54465.jpg
    When it comes to experiencing the allure of crime-solving sprinkled with delicious dining, California's murder mystery dinner train rides have carved a niche for themselves among both locals and touri…

    Read More

  36. Illinois ~ Murder Mystery ~ Dinner Train Rides

    Jan 14, 26 01:13 PM

    14180316949_0e9a4fafa4_o.jpg
    Among Illinois's scenic train rides, one of the most unique and captivating experiences is the murder mystery excursion.

    Read More

  37. Vermont's - Murder Mystery - Dinner Train Rides

    Jan 14, 26 12:57 PM

    8237425354235427872689297.jpg
    There are currently murder mystery dinner trains offered in Vermont but until recently the Champlain Valley Dinner Train offered such a trip!

    Read More

  38. Massachusetts Dinner Train Rides On Cape Cod!

    Jan 14, 26 12:20 PM

    0821341273423578346893897689437897.jpg
    The Cape Cod Central Railroad (CCCR) has carved out a special niche by pairing classic New England scenery with old-school hospitality, including some of the best-known dining train experiences in the…

    Read More

  39. Maine Dinner Train Rides In Portland!

    Jan 14, 26 11:31 AM

    971824712512641587923568969289798078.jpg
    While this isn’t generally a “dinner train” railroad in the traditional sense—no multi-course meal served en route—Maine Narrow Gauge does offer several popular ride experiences where food and drink a…

    Read More

  40. Kentucky Dinner Train Rides In Bardstown!

    Jan 13, 26 01:14 PM

    52769945142_c47f285374_k.jpg
    The essence of My Old Kentucky Dinner Train is part restaurant, part scenic excursion, and part living piece of Kentucky rail history.

    Read More

  41. Kansas Dinner Train Rides In Abilene!

    Jan 13, 26 12:44 PM

    836265236523857217352396892897.jpg
    If you’re looking for a heritage railroad that feels authentically Kansas—equal parts prairie scenery, small-town history, and hands-on railroading—the Abilene & Smoky Valley Railroad (A&SV) delivers.

    Read More

  42. Michigan ~ Murder Mystery ~ Dinner Train Rides

    Jan 13, 26 11:24 AM

    12i47127634123561258712378287896893789.jpg
    Among the lesser-known treasures of this state are the intriguing murder mystery dinner train rides—a perfect blend of suspense, dining, and scenic exploration.

    Read More

  43. Virginia's - Murder Mystery - Dinner Train Rides

    Jan 13, 26 11:11 AM

    679569bv3442q354789675.jpg
    Among the state's railroad attractions, murder mystery dinner trains stand out as a captivating fusion of theatrical entertainment, fine dining, and scenic travel.

    Read More

  44. Arizona Dinner Train Rides At The Grand Canyon!

    Jan 13, 26 10:59 AM

    11719275286_946bf1fdf8_k.jpg
    While the Grand Canyon Railway does not offer a true, onboard dinner train experience it does offer several upscale options and off-train dining.

    Read More

  45. Georgia Dinner Train Rides In Nashville!

    Jan 13, 26 10:27 AM

    572064638_1365889122214459_4501521349488404988_n.jpg
    If you’ve ever wished you could slow down, trade traffic for jointed rail, and let a small-town landscape roll by your window while a hot meal is served at your table, the Azalea Sprinter delivers tha…

    Read More

  46. Indiana Valentine's Train Rides

    Jan 12, 26 04:27 PM

    238527354615487268923689987.jpg
    If you’ve ever wished you could step into a time when passenger trains were a Saturday-night treat and a whistle echoing across farm fields meant “adventure,” the Nickel Plate Express delivers that fe…

    Read More

  47. Ohio Valentine's Train Rides!

    Jan 12, 26 04:20 PM

    921781726712478287532687978978.jpg
    The Hocking Valley Scenic Railway offers one of the region’s most atmospheric ways to experience the Hocking Hills area: from the rhythmic click of jointed rail to the glow of vintage coaches rolling…

    Read More

  48. Wisconsin's - Wine Tasting - Train Rides

    Jan 12, 26 03:10 PM

    1923841284174287159826989877.jpg
    Wisconsin might not be the first state that comes to mind when one thinks of wine, but this scenic region is increasingly gaining recognition for its unique offerings in viticulture.

    Read More

  49. California's - Wine Tasting - Train Rides

    Jan 12, 26 02:34 PM

    8h215316247817259128689.jpg
    This article explores the charm, routes, and offerings of these unique wine tasting trains that traverse California’s picturesque landscapes.

    Read More

  50. Wisconsin Scenic Train Rides In North Freedom!

    Jan 12, 26 02:20 PM

    18274172412589256892679878.jpg
    The Mid-Continent Railway Museum is a living-history museum built around the sights, sounds, and everyday rhythms of small-town and shortline railroading in the early 20th century, what the museum cal…

    Read More