The EMD SW7 was a diesel

Diesel locomotive

A diesel locomotive is a type of railroad locomotive in which the prime mover is a diesel engine, a reciprocating engine operating on the Diesel cycle as invented by Dr. Rudolf Diesel...

 switcher

Switcher

A switcher or shunter is a small railroad locomotive intended not for moving trains over long distances but rather for assembling trains ready for a road locomotive to take over, disassembling a train that has been...

 locomotive

Locomotive

A locomotive is a railway vehicle that provides the motive power for a train. The word originates from the Latin loco – "from a place", ablative of locus, "place" + Medieval Latin motivus, "causing motion", and is a shortened form of the term locomotive engine, first used in the early 19th...

 built by General Motors Electro-Motive Division between October 1949 and January 1951. It was powered by a V12

V12 engine

A V12 engine is a V engine with 12 cylinders mounted on the crankcase in two banks of six cylinders, usually but not always at a 60° angle to each other, with all 12 pistons driving a common crankshaft....

 567A engine

EMD 567

The EMD 567 is a line of diesel engines built by General Motors' Electro-Motive Division. This engine, which succeeded Winton's 201-A, was used in EMD's locomotives from 1938 until its replacement in 1966 by the EMD 645. It has a bore of , a stroke of and a displacement of 567 in³ per cylinder...

 developing 1200 hp. 489 SW7 locomotives were produced. The majority of the SW7s were built by EMD Plant #3 in Cleveland, Ohio. In addition, 15 TR4 cow-calf

Cow-calf

In North American railroading, a cow-calf locomotive is a set of switcher-type diesel locomotives. The set usually is a pair; some 3-unit sets were built, but this was rare. A cow is equipped with a driving cab; a calf is not...

 paired sets were produced.

SW7

Railroad	Quantity	Road numbers	Notes
Arkansas and Louisiana Missouri Railway	1	11
Atlantic Coast Line Railroad Atlantic Coast Line Railroad The Atlantic Coast Line Railroad was an American railroad that existed between 1900 and 1967, when it merged with the Seaboard Air Line Railroad, its long-time rival, to form the Seaboard Coast Line Railroad...	9	643–651
Central Railroad of New Jersey Central Railroad of New Jersey The Central Railroad of New Jersey , commonly known as the Jersey Central Lines or CNJ, was a Class I railroad with origins in the 1830s, lasting until 1976 when it was absorbed into Conrail with the other bankrupt railroads of the Northeastern United States...	4	1080–1083
Charleston and Western Carolina Railway	2	800–801
Chesapeake and Ohio Railway Chesapeake and Ohio Railway The Chesapeake and Ohio Railway was a Class I railroad formed in 1869 in Virginia from several smaller Virginia railroads begun in the 19th century. Led by industrialist Collis P...	26	5214–5239
Chicago and Eastern Illinois Railroad Chicago and Eastern Illinois Railroad The Chicago and Eastern Illinois Railroad was a Class I railroad that linked Chicago to southern Illinois, St. Louis, and Evansville. Founded in 1877, it grew aggressively and stayed relatively strong throughout the Great Depression and two World Wars before being purchased by the Missouri Pacific...	6	126–131
Chicago and Eastern Illinois (Chicago Heights Terminal and Transfer Railroad)	2	132–133
Chicago and Illinois Western Railroad	3	101–103
Chicago, Burlington and Quincy Railroad Chicago, Burlington and Quincy Railroad The Chicago, Burlington and Quincy Railroad was a railroad that operated in the Midwestern United States. Commonly referred to as the Burlington or as the Q, the Burlington Route served a large area, including extensive trackage in the states of Colorado, Illinois, Iowa, Kentucky, Missouri,...	20	9249–9268
Clinchfield Railroad Clinchfield Railroad The Clinchfield Railroad was an operating and holding company for the Carolina, Clinchfield and Ohio Railway . The line ran from the coalfields of Virginia and Elkhorn City, Kentucky, to the textile mills of South Carolina...	6	350–355
Colorado and Southern Railway Colorado and Southern Railway The Colorado and Southern Railway was a railroad company in the western United States that operated independently from 1898 to 1908, then as part of the Chicago, Burlington and Quincy Railroad until it was absorbed into the Burlington Northern Railroad in 1981.The railway began as the...	1	154
Conemaugh and Black Lick Railroad	15	103–117
Cornwall Railroad	3	120–122
Detroit and Toledo Shore Line Railroad Detroit and Toledo Shore Line Railroad The Detroit and Toledo Shore Line Railroad is a historic railroad that operated in northwestern Ohio and southeastern Michigan.The Pleasant Bay Railway was incorporated in Michigan in March 1898 and purchased the Toledo and Ottawa Beach Railway, an Ohio company incorporated in January 1898, in...	3	116–118
Detroit Terminal	1	116
Detroit, Toledo and Ironton Railroad Detroit, Toledo and Ironton Railroad The Detroit, Toledo and Ironton Railroad was a railroad that operated between its namesake cities of Detroit, Michigan and Ironton, Ohio via Toledo between 1905 and 1983.-Early history:...	5	920–924
Erie Railroad Erie Railroad The Erie Railroad was a railroad that operated in New York State, New Jersey, Pennsylvania, Ohio, Indiana, and Illinois, originally connecting New York City with Lake Erie...	6	428–433
Great Northern Railway Great Northern Railway (US) The Great Northern Railway , running from Saint Paul, Minnesota, to Seattle, Washington—more than 1,700 miles —was the creation of the 19th century railroad tycoon James J. Hill and was developed from the Saint Paul and Pacific Railroad...	11	163–170, 11–13
Illinois Central Railroad Illinois Central Railroad The Illinois Central Railroad , sometimes called the Main Line of Mid-America, is a railroad in the central United States, with its primary routes connecting Chicago, Illinois with New Orleans, Louisiana and Birmingham, Alabama. A line also connected Chicago with Sioux City, Iowa...	50	9300–9319, 9400–9429
Kansas City Southern Railway Kansas City Southern Railway The Kansas City Southern Railway , owned by Kansas City Southern Industries, is the smallest and second-oldest Class I railroad company still in operation. KCS was founded in 1887 and is currently operating in a region consisting of ten central U.S. states...	10	1300–1309
Kansas City Southern Railway (Louisiana and Arkansas Railway Louisiana and Arkansas Railway The Louisiana and Arkansas Railway was a railroad that operated in the states of Arkansas, Louisiana, and Texas. The railroad's main line extended 332 miles, from Hope, Arkansas to Shreveport and New Orleans... )	6	1310–1315
Lakeside and Marblehead Railroad Lakeside and Marblehead Railroad Incorporated on April 17, 1886, at Marblehead, Ohio, the Lakeside and Marblehead Railroad was a short standard gauge railroad that spanned about seven miles in length...	1	12
Lehigh Valley Railroad Lehigh Valley Railroad The Lehigh Valley Railroad was one of a number of railroads built in the northeastern United States primarily to haul anthracite coal.It was authorized April 21, 1846 in the U.S. state of Pennsylvania and incorporated September 20, 1847 as the Delaware, Lehigh, Schuylkill and Susquehanna Railroad...	5	220–224
Louisiana Midland Railway Louisiana Midland Railway The Louisiana Midland Railway, was a Class III railroad operating in the US state of Louisiana. The branch of the Louisiana & Arkansas Railway that would become the Louisiana Midland fell under different names those names and time line are as followed:...	1	10
Louisville and Nashville Railroad Louisville and Nashville Railroad The Louisville and Nashville Railroad was a Class I railroad that operated freight and passenger services in the southeast United States.Chartered by the state of Kentucky in 1850, the L&N, as it was generally known, grew into one of the great success stories of American business...	22	2245–2266
Maine Central Railroad Maine Central Railroad The Maine Central Railroad Company was a railroad in central and southern Maine. It was chartered in 1856 and began operations in 1862. It operated a mainline between South Portland, Maine, east to the Canada-U.S...	3	331–333
Milwaukee Road	1	1646	renumbered
Missouri Pacific Railroad Missouri Pacific Railroad The Missouri Pacific Railroad , also known as the MoPac, was one of the first railroads in the United States west of the Mississippi River. MoPac was a Class I railroad growing from dozens of predecessors and mergers, including the St. Louis, Iron Mountain and Southern Railway , Texas and Pacific...	5	9142–9146
Monessen Southwestern	1	21
Montour Railroad Montour Railroad Montour Railroad is a former short line railroad company operating passenger and freight service on standard gauge track in southwestern Pennsylvania...	1	72
Nashville, Chattanooga and St. Louis Railway Nashville, Chattanooga and St. Louis Railway The Nashville, Chattanooga and St. Louis Railway was a railway company operating in the southern United States in Kentucky, Tennessee, Alabama and Georgia...	10	24–33
New York Central Railroad New York Central Railroad The New York Central Railroad , known simply as the New York Central in its publicity, was a railroad operating in the Northeastern United States...	34	8851–8855, 8880–8897, 8911–8921
New York Central (Indiana Harbor Belt Railroad Indiana Harbor Belt Railroad The Indiana Harbor Belt Railroad is a Class III railroad in the United States. The line comprises of track—30 miles of single mainline track, of double-main track and of additional yard and side track—starting northwest of Chicago in Franklin Park, Illinois, traveling southeast... )	40	8835–8850, 8856–8879
New York Central (Chicago River and Indiana Railroad)	6	8898–8903
New York Central (Peoria and Eastern Railway Peoria and Eastern Railway The Peoria and Eastern Railway was incorporated on February 21, 1890, for the purpose of constructing or acquiring a railway between Pekin, Illinois, and Indianapolis, Indiana. The following day, the company acquired such a railroad from Charles H... )	7	8904–8910
New York, Chicago and St. Louis Railroad New York, Chicago and St. Louis Railroad The New York, Chicago and St. Louis Railroad , abbreviated NYC&St.L, was a railroad that operated in the mid-central United States. Commonly referred to as the Nickel Plate Road, the railroad served a large area, including trackage in the states of New York, Pennsylvania, Ohio, Indiana, and Illinois...  (“Nickel Plate Road”)	3	230–232
Northern Pacific Railway Northern Pacific Railway The Northern Pacific Railway was a railway that operated in the west along the Canadian border of the United States. Construction began in 1870 and the main line opened all the way from the Great Lakes to the Pacific when former president Ulysses S. Grant drove in the final "golden spike" in...	8	107–114
Pennsylvania Railroad Pennsylvania Railroad The Pennsylvania Railroad was an American Class I railroad, founded in 1846. Commonly referred to as the "Pennsy", the PRR was headquartered in Philadelphia, Pennsylvania....	48	8861–8868, 8871–8872, 9358–9395
Peoria and Pekin Union Railway Peoria and Pekin Union Railway The Peoria and Pekin Union Railway is a switching and terminal railroad in Illinois that began operating in 1881 and was leased to the Tazewell and Peoria Railroad in 2004. Its main yard and roundhouse are in East Peoria, Illinois, and it owns track on both sides of the Illinois River...	5	406–410
Phelps Dodge Corporation (New Cornelia Branch Mine)	1	6
Philadelphia, Bethlehem and New England Railroad	4	31–34
River Terminal Railway	2	61–62
Southern Railway (Alabama Great Southern Railroad Alabama Great Southern Railroad The Alabama Great Southern Railroad is a railroad in the U.S. states of Alabama, Georgia, Louisiana, Mississippi, and Tennessee. It is an operating subsidiary of the Norfolk Southern Corporation , running southwest from Chattanooga to New Orleans through Birmingham and Meridian... )	5	6505–6509
Southern Railway (Cincinnati, New Orleans and Texas Pacific Railway Cincinnati, New Orleans and Texas Pacific Railway The Cincinnati, New Orleans and Texas Pacific Railway is a railroad that runs from Cincinnati, Ohio, south to Chattanooga, Tennessee, forming part of the Norfolk Southern Railway system. The rail line that it operates, the Cincinnati Southern Railway, is owned by the City of Cincinnati and is... )	14	6060–6073
Southern Railway (Georgia Southern and Florida Railway Georgia Southern and Florida Railway Also known as the Suwanee River Route from its crossing of the Suwanee River, the Georgia Southern and Florida Railway was founded in 1885 as the Georgia Southern and Florida Railroad and began operations between Macon, GA and Valdosta, GA in 1889, extending to Palatka, FL in 1890... )	4	8200–8203
Southern Railway (New Orleans and North Eastern Railway)	12	6852–6863
St. Louis Southwestern Railway St. Louis Southwestern Railway The St. Louis Southwestern Railway , known by its nickname of "The Cotton Belt Route" or simply Cotton Belt, was organized on January 15, 1891, although it had its origins in a series of short lines founded in Tyler, Texas, in 1870 that connected northeastern Texas to Arkansas and southeastern...  (“Cotton Belt”)	4	1054–1057
St. Louis-San Francisco Railway St. Louis-San Francisco Railway The St. Louis – San Francisco Railway , also known as the Frisco, was a railroad that operated in the Midwest and South Central U.S. from 1876 to 1980.-History:...  (“Frisco”)	5	300–304
Texas and Pacific Railway Texas and Pacific Railway The Texas and Pacific Railway Company was created by federal charter in 1871 with the purpose of building a southern transcontinental railroad between Marshall, Texas, and San Diego, California....	4	1020–1023
Union Pacific Railroad Union Pacific Railroad The Union Pacific Railroad , headquartered in Omaha, Nebraska, is the largest railroad network in the United States. James R. Young is president, CEO and Chairman....	25	1800–1824
Union Railroad Union Railroad (Pittsburgh, Pennsylvania) The Union Railroad is a Class III switching railroad located in Allegheny County in Western Pennsylvania. The company is owned by Transtar, Inc., which is itself a subsidiary of USS Corp, more popularly known as United States Steel...	4	571–574
Wabash Railroad Wabash Railroad The Wabash Railroad was a Class I railroad that operated in the mid-central United States. It served a large area, including trackage in the states of Ohio, Indiana, Illinois, Iowa, Michigan, Missouri and Ontario. Its primary connections included Chicago, Illinois, Kansas City, Missouri, Detroit,...	8	355–362
Weyerhaueser Timber Company Weyerhaeuser Weyerhaeuser is one of the largest pulp and paper companies in the world. It is the world's largest private sector owner of softwood timberland; and the second largest owner of United States timberland, behind Plum Creek Timber...	2	300–301
Woodward Iron Company Woodward Iron Company The Woodward Iron Company was founded on December 31, 1881, by two brothers, William & Joseph Woodward. William was the company president and Joseph was the company secretary. The company operated mines, quarries and furnaces that were connected by a private industrial railroad in Bessemer,...	2	50–51
Youngstown and Southern Railway	2	70–71
Total	489

TR4

Railroad	Quantity	Road numbers	Notes
Atchison, Topeka and Santa Fe Railway Atchison, Topeka and Santa Fe Railway The Atchison, Topeka and Santa Fe Railway , often abbreviated as Santa Fe, was one of the larger railroads in the United States. The company was first chartered in February 1859...	2 sets	2418,A–2419,A
Belt Railway of Chicago Belt Railway of Chicago The Belt Railway of Chicago , headquartered in Chicago, is the largest switching terminal railroad in the United States. It is co-owned by six Class I railroads — BNSF Railway, Canadian National Railway, Canadian Pacific Railway, CSX Transportation, Norfolk Southern Railway, and Union...	5 sets	502AB–506AB
Chesapeake and Ohio Railway Chesapeake and Ohio Railway The Chesapeake and Ohio Railway was a Class I railroad formed in 1869 in Virginia from several smaller Virginia railroads begun in the 19th century. Led by industrialist Collis P...	2 sets	6001AB–6002AB
Milwaukee Road	6 sets	2001AB–2006AB
Total	15 sets