List of Milwaukee Road locomotives explained

These are locomotives of the Chicago, Milwaukee, St. Paul and Pacific Railroad, often referred to as the "Milwaukee Road". The Milwaukee was acquired by the Soo Line in 1985 and the Soo subsequently became part of the Canadian Pacific Railway.

bgcolor=c0c090	Steam	Class A (4-4-2), B (4-6-0), C (2-8-0), F (4-6-2, 4-6-4), G (4-6-0), H (4-4-0), I (0-6-0), J (0-4-0), K (2-6-2), L (2-8-2), M (2-6-0), N (2-6-6-2), S (4-8-4), X (Shays)
bgcolor=c0c090	Diesel	ALCO, Baldwin, Davenport, EMD (Switchers, Cab units, Hood units), Fairbanks-Morse, General Electric, Whitcomb
bgcolor=c0c090	Electric	Switchers, Passenger, Freight
bgcolor=c0c090	Rebuilds	EMD
----References

Steam

Milwaukee Road steam locomotives were organized into classes by wheel arrangement. Additional suffixes, where used indicated:

• s: fitted with a superheater (where the class was not fitted from new)
• r: fitted with a mechanical stoker (where the class was not fitted from new)

Class A: 4-4-2

Class A was the 4-4-2 type.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	A1		BLW	1896–1903	1934–1948	13 × 26 22 × 26	330×660 559×660	783NaN3	2002NaN2	C:15,577 S:20,250	C:69.29 S:90.08	Vauclain compound, all rebuilt simple 1921–1922 as class A1-a. Eleven superheated 1925–1929 as class A1-as.
	A1-as		Milwaukee Road	1925–1929 (rebuilt)	1934–1948	19 × 26	483×660	793NaN3	2002NaN2	201972NaN2	Simple
	A2		BLW	1901	1927–1929	15 × 28 25 × 28	381×711 635×711	843NaN3	2002NaN2	204202NaN2	Vauclain compound
	A2-a		BLW	1902–1903	1927–1929	15 × 28 25 × 28	381×711 635×711	843NaN3	2002NaN2	204202NaN2	Vauclain compound
	A2-b		Milwaukee Road	1907–1908	1927–1929	15 × 28 25 × 28	381×711 635×711	853NaN3	2202NaN2	221902NaN2	Compound
	A2-c		BLW	1908–1909	1928–1930	15 × 28 25 × 28	381×711 635×711	853NaN3	2202NaN2	221902NaN2	Vauclain compound
	A2		BLW 31274, 31275	1907	1951	15 × 28 25 × 28	381×711 635×711	853NaN3	2202NaN2	222002NaN2	Balanced compound, rebuilt simple as class A4-s
	A4-s		Milwaukee Road	(rebuilt)	1951	22 × 28	559×711	793NaN3	2002NaN2	291602NaN2
	A3-s		BLW 33778	1909	1951	22 × 28	559×711	733NaN3			252402NaN2	Acquired with Idaho and Washington Northern Railroad. Rebuilt as class A4-as
	A4-as		Milwaukee Road	(rebuilt)	1951	22 × 28	559×711	793NaN3	2002NaN2	291622NaN2
	A		Alco	1935–1937	1949–1951	19 × 28	483×711	843NaN3	3002NaN2	306852NaN2	Streamlined

Class B: 4-6-0

Class B was for Vauclain compound 4-6-0s built by Baldwin Locomotive Works. Most were rebuilt as simple engines, those not rebuilt were scrapped in the late 1920s.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	B		BLW	1892	1914	12 × 26 20 × 26	305×660 508×660	623NaN3	1902NaN2	156002NaN2	Rebuilt to class G5-xs
	B1		BLW	1895–1897	1913–1915	12 × 26 21 × 26	318×660 533×660	623NaN3	2002NaN2	C:17,950 S:21,540	C:79.85 S:95.81	All rebuilt to class G5-s
	B2		BLW	1897–1899	1914–1925	13× 26 23 × 26	343×660 584×660	623NaN3	2002NaN2	C:20,944 S:25,500	C:93.16 S:113.43	19 rebuilt to class G6-fs, 18 rebuilt to class G6-m
	B2		BLW	1900	1915–1924	13× 26 23 × 26	343×660 584×660	623NaN3	2002NaN2	212502NaN2	3 rebuilt to class G6-gs, 4 rebuilt to G6-n
	B3-x		BLW	1899	1927	14 × 30 24 × 30	256×762 610×762	683NaN3	2002NaN2	242002NaN2	Scrapped
	B3		BLW	1900	1915–1927	15 × 26 25 × 26	381×660 635×660	683NaN3	2002NaN2	C:23,079 S:28,080	C:102.66 S:124.91	9 rebuilt to class G6-s, 4 rebuilt to class G6-os, 12 rebuilt to class G6-ps.
	B4-x		BLW	1899	1927	15 × 30 25 × 30	381×762 635×762	693NaN3	2002NaN2	266302NaN2	Scrapped
	B4		BLW	1900	1921–1927	15 × 30 25 × 30	381×762 635×762	693NaN3	2002NaN2	C:26,630 S:31,956	C:118.46 S:142.15	Narrow firebox. 10 rebuilt to class G7-as, 6 scrapped
	B4		BLW	1901–1903	1915–1925	15 × 28 25 × 28	381×711 635×711	633NaN3	2002NaN2	C:27,222 S:32,666	C:121.09 S:145.31	Wide firebox. 20 rebuilt to class G7-bs, 4 rebuilt to class G7-cs, 25 rebuilt to class G8, 17 rebuilt to class G8-a,

Class C: 2-8-0

Class C was the 2-8-0 type.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	C1-a		BLW 19400–19401	1901	1934–1935	22 × 28	559×711	553NaN3	2002NaN2	418882NaN2
	C1-b		BLW 19398–19399	1901	1934–1940	22 × 28	559×711	563NaN3	2002NaN2	411402NaN2	Later class C1-c
	C1-c		Milwaukee Road	1904–1907	1934–1949	22 × 28	559×711	553NaN3	2002NaN2	418902NaN2
	C1-d		Alco-Rogers	1908–1909	1934–1936	22 × 28	559×711	573NaN3	1902NaN2	383912NaN2	Acquired with Chicago, Terre Haute & Southeastern Railroad
	C1-e		Alco-Brooks	1905	1934–1936	19 × 28	495×711	573NaN3	2002NaN2	317542NaN2	Acquired with Chicago, Milwaukee & Gary Railroad; né Detroit Southern Railroad
	C1-f		BLW 32441–32442	1907	1934	21 × 28	533×711	553NaN3	2002NaN2	381662NaN2	Acquired with Chicago, Milwaukee & Gary Railroad
	C1-g		BLW 35425–35426	1910	1934	21 × 28	533×711	553NaN3	2002NaN2	381662NaN2	Acquired with Chicago, Milwaukee & Gary Railroad
	C2		Milwaukee Road (25) BLW (50)	1909–1910	1936–1965	23 × 30	584×762	633NaN3	2002NaN2	428202NaN2
	C3		BLW 32176, 32208	1907	1935	22 × 28	559×711	513NaN3	2002NaN2	451702NaN2	Acquired with Idaho and Washington Northern Railroad
	C3-a		BLW	1910–1911	1934–1951	22 × 30	559×762	553NaN3	2002NaN2	448802NaN2	Acquired with Idaho and Washington Northern Railroad
	C3-b		Alco-Rogers	1909	1945–1949	22 × 30	559×762	573NaN3	2002NaN2	433002NaN2
	C4		BLW 24742	1904	1927	20 × 24	508×610	493NaN3					Acquired with Montana Railroad
	C5		Milwaukee Road	1912	1951–1954	24 × 30	610×762	633NaN3	1852NaN2	431302NaN2
	C5-a		Alco-Brooks (35) Milwaukee Road (10)	1912–13	1945–1954	24 × 30	610×762	633NaN3	1852NaN2	431302NaN2
	C7		Alco-Schen	1910	1950–1953	25 × 32	635×813	613NaN3	1802NaN2	501632NaN2	Acquired with Chicago, Terre Haute & Southeastern Railroad
	C7-a		Alco-Schen	1912–1918	1950–1953	25 × 32	635×813	613NaN3	1802NaN2	501632NaN2	Acquired with Chicago, Terre Haute & Southeastern Railroad
	C9-a		Pittsburgh	1901	1921	19 × 24	483×610	503NaN3					Acquired with Tacoma Eastern Railroad
	C9-b		BLW 5943	1881	1929	20 × 24	508×610	503NaN3	1502NaN2	244802NaN2	Acquired with Bellingham Bay and British Columbia Railroad
	C9-c		BLW 13800	1893	1929	19 × 24	483×610	503NaN3	1502NaN2	265112NaN2	Acquired with Bellingham Bay and British Columbia Railroad
	C9-d		BLW 24742	1904	1927	20 × 24	508×610	543NaN3					Acquired with Bellingham Bay and British Columbia Railroad
	C9-d		BLW 13800	1906	1935	22 × 28	559×711	503NaN3	2002NaN2	460762NaN2	Acquired with Tacoma Eastern Railroad

Class D: 0-8-0

Class D was the 0-8-0 type.

Class E

Class E was reserved for the electric locomotives.

Class F: 4-6-2 and 4-6-4

Class F covered the 4-6-2 and 4-6-4 types.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	F1 (1st) 4-6-2		Schenectady 2855	1889	1926	19 × 24	483×610	683NaN3	1802NaN2	194902NaN2	Rebuild to G4-g class 4-6-0
	F2 4-6-2		Milwaukee Road	1905	1929	23 × 26	584×660	723NaN3	2002NaN2	344702NaN2
	F3 4-6-2		Alco-Brooks 47442–47491, 48714–47433	1910	1929–1954	23 × 28	584×711	793NaN3	2002NaN2	318702NaN2	All rebuilt to F3-s, F3-as or F3-bs. Two streamlined as F1 (second). One streamlined as F3 (second)
	F4 4-6-2		Milwaukee Road	1910	1916–1954	23 × 28	584×711	693NaN3	2002NaN2	364902NaN2	All rebuilt to F4-b (2), F4-ms (17) or F5-bs (6).
	F5 4-6-2		Milwaukee Road (15 new, 6 rebuilt from F4) Alco-Brooks (50) 51134–51163, 51328–51347	1911–1912	1934–1954	25 × 28	635×711	693NaN3	1852NaN2	398802NaN2	All rebuilt to F5-b, F5-n or F3-an.
	F6 4-6-4		BLW 61135–61148	1930	1952–1954	26 × 28	660×711	803NaN3	2252NaN2	452502NaN2
	F6-a 4-6-4		BLW 61655–61662	1931	1952–1954	26 × 28	660×711	803NaN3	2252NaN2	452502NaN2
	F7 4-6-4		Alco 69064–69069	1938	1949–1951	23 × 30	597×762	843NaN3	3002NaN2	501942NaN2	Streamlined

Class G: 4-6-0

Class G was the simple 4-6-0 type, some of which were rebuilt from class B compounds.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	G1		Cooke	1892	1902	17 × 24	432×610	563NaN3	1302NaN2	206002NaN2	Acquired with Milwaukee and Superior Railroad
	G2		Brooks 1333–1335, 1514	1888–1889	1925–1927	18 × 24	457×610	563NaN3					Acquired with Milwaukee and Northern Railroad
	G2-a		Brooks 1707–1708	1890	1926	18 × 24	457×610	573NaN3					Acquired with Milwaukee and Northern Superior Railroad
	G2-b		PRR's Logansport, Indiana shops	1888	1926	19 × 22	483×559	503NaN3					Acquired with Tacoma Eastern Railroad
	G2-c		BLW 23673	1904	1931	18 × 24	457×610	633NaN3	2002NaN2	209802NaN2	Acquired with Tacoma Eastern Railroad
	G3		R.I. 2548, 2635–2640	1891–1892	1926–1927	18 × 24	457×610	573NaN3	1602NaN2	185502NaN2
	G4		Schen		1925	18 × 26	457×660	573NaN3					Acquired with Montana Railroad
	G4-a		Brooks 1219–1220, 1255–1256	1887	1926–1928	18 × 24	457×610	513NaN3	1502NaN2	194402NaN2	Acquired with Milwaukee and Northern Railroad
	G4-b		R.I. 3128–3129	1896	1927–1929	18 × 24	457×610	573NaN3	1852NaN2	191332NaN2	Acquired with Des Moines Northern and Western Railroad
	G4-c		R.I. 1047, 1052–1053	1881	1926	19 × 26	483×660	623NaN3
	G4-d		R.I. 1411–1430	1883	1926–1933	19 × 26	483×660	633NaN3	1502NaN2	189952NaN2
	G4-e		R.I. (40); Schen (35); Brooks (1); Grant (25);	1885–1888	1926–1933	19 × 26	483×660	633NaN3	1502NaN2	189952NaN2
	G4-f		BLW 15888–15891, 16017–16019	1898		18 × 24	457×610	513NaN3	1802NaN2	208722NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroad, né Southern Indiana
	G4-g		MILW's Milwaukee shops	1926 (rebuilt)	1930	19 × 24	483×610	683NaN3	1802NaN2	194942NaN2	Rebuilt from F1 class 4-6-2
	G5		R.I.	1891	1925–1934	19 × 26	483×660	573NaN3	1502NaN2	209952NaN2	Eight sold to Montana Railroad in 1907; re-acquired with Montana Railroad in 1910.
	G5-a		Schen 3302–3311 (10); BLW (9)	1890–1892	1926–1935	18 × 26	452×660	633NaN3	1802NaN2	204602NaN2
	G5-b		R.I. 2151	1889	1926	19 × 24	483×610	643NaN3
	G5-s		Milwaukee Road (re-builder)	1913–1915	1938–1945	19 × 26	483×660	633NaN3	1802NaN2	227942NaN2	Rebuilt from class B1
	G5-c		BLW 32348	1907	1927	19 × 26	483×660	563NaN3					Acquired with Bellingham Bay and British Columbia Railroad
	G5-d		Rogers 5386–5388	1899	1930–1934	18 × 26	457×660	513NaN3	1902NaN2	266762NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroad; né Southern Indiana Railroad
	G5-e		BLW	1903	1934	19 × 26	483×660	533NaN3	1802NaN2	270952NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroad; né Southern Indiana Railroad
	G6-a		Milwaukee Road's Milwaukee Shops	1905	1931–1936	20 × 26	521×660	733NaN3	2002NaN2	254452NaN2	17 superheated as class G6-as
	G6-b		Milwaukee Road's Milwaukee Shops	1907	1945–1948	20 × 26	521×660	733NaN3	2002NaN2	254452NaN2	4 superheated as class G6-bs
	G6-c		Alco-Brooks 45789–45801	1909	1930–1948	20 × 26	521×660	733NaN3	2002NaN2	254452NaN2	11 superheated ad class G6-cs
	G6-d		BLW 31269–31270	1907	1935	18 × 26	457×660	563NaN3	2002NaN2	255702NaN2	Acquired with Idaho and Washington Northern Railroad
	G6-e		BLW 31648, 32119, 32764	1907–1908	1935	19 × 26	483×660	633NaN3	2002NaN2	253272NaN2	Acquired with Idaho and Washington Northern Railroad
	G6-fs		Milwaukee Road (rebuilder)	1914–1918 (rebuilt)	1932–1954	20 × 26	508×660	633NaN3	1802NaN2	252602NaN2	Rebuilt from class B2
	G6-gs		Milwaukee Road (rebuilder)	1915 (rebuilt)	1945–1953	20 × 26	508×660	633NaN3	1802NaN2	252572NaN2	Rebuilt from class B2
	G6-h		Cooke 2252	1893	1930	21 × 26	533×660	633NaN3	1802NaN2	313262NaN2	Acquired with Tacoma Eastern Railroad
	G6-k		BLW 23682, 26638, 28486	1904–1906	1926–1932	20 × 26	508×660	573NaN3	1902NaN2	293272NaN2	Acquired with Tacoma Eastern Railroad
	G6-m		Milwaukee Road (rebuilder)	1921–1928 (rebuilt)	1950–1954	19 × 26	483×660	633NaN3	1802NaN2	253272NaN2	Rebuilt from class B2; all superheated as class G6-ms
	G6-n		Milwaukee Road (rebuilder)	1921–24 (rebuilt)	1941–1952	19 × 26	483×660	633NaN3	1802NaN2	253272NaN2	Rebuilt from class B2; all superheated as class G6-ns
	G6-os		Milwaukee Road (rebuilder)	1921 (rebuilt)	1949–1951	22 × 26	559×660	693NaN3	2002NaN2	310042NaN2	Rebuilt from class B3
	G6-ps		Milwaukee Road (rebuilder)	1921–1927 (rebuilt)	1947–1954	22 × 26	559×660	693NaN3	2002NaN2	310042NaN2	Rebuilt from class B3; Two streamlined as class G 1937–1948
	G6-s		Milwaukee Road (rebuilder)	1915–1918 (rebuilt)	1945–1951	22 × 26	572×660	693NaN3	1802NaN2	291902NaN2	Rebuilt from class B3
	G6-r		Alco-Rogers 37567–37572	1905	1934	19 × 26	483×660	573NaN3	1902NaN2	265542NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroaad, né Chicago Southern Railroad
	G7		Milwaukee Road's Milwaukee Shops	1904–1909	1928–1940	21 × 30	533×762	693NaN3	2002NaN2	326002NaN2	Seven superheated as class G7-s
	G7-as		Milwaukee Road (rebuilder)	1921 (rebuilt)	1940–1954	21 × 30	533×762	693NaN3	2002NaN2	325952NaN2	Rebuilt from class B4
	G7-bs		Milwaukee Road (rebuilder)	1915–1918 (rebuilt)	1950–1954	22 × 28	559×711	633NaN3	1802NaN2	329122NaN2	Rebuilt from class B4
	G7-cs		Milwaukee Road (rebuilder)	1918–1920 (rebuilt)	1948–1954	22 × 28	559×711	633NaN3	1802NaN2	329122NaN2	Rebuilt from class B4
	G8		Milwaukee Road (rebuilder)	1919–1920 (rebuilt)	1950–1957	22 × 28	559×711	633NaN3	2002NaN2	365682NaN2	Rebuilt from class B4
	G8-a		Milwaukee Road (rebuilder)	1921–1925 (rebuilt)	1948–1956	22 × 28	559×711	633NaN3	2002NaN2	365682NaN2	Rebuilt from class B4

Class H: 4-4-0

Class H covered the 4-4-0 "American" type.

• Milwaukee Road class H1
• Milwaukee Road class H2
• Milwaukee Road class H3
• Milwaukee Road class H4
• Milwaukee Road class H5

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	H6		Brooks 1599–1600	1890	1926–1927	17 × 24	432×610	623NaN3					Acquired 1893 with Milwaukee and Northern
	H6-b		Schen.3556–3557 R. I. 2797	1891–1892	1926–1930	17 × 24	432×610	623NaN3					Acquired 1899 with Des Moines and North Western
	H6-c		Brooks 1432–1433, 1512–1513	1888–1889	1926	17 × 24	432×610	623NaN3					Acquired 1893 with Milwaukee and Northern
	H6-d		R. I. 1687–1696 Brooks 1148 Cooke 1754–1763 Grant (10)	1886–1887	1926–1947	18 × 24	457×610	683NaN3	1502NaN2	145002NaN2
	H7		R. I. 1272–1293, 1304–1306	1882–1883	1925–1932	18 × 24	457×610	633NaN3	1502NaN2	157052NaN2
	H7-a		R. I. 1676–1678	1886	1928–1930	18 × 24	457×610	633NaN3	1502NaN2	157402NaN2	Acquired with Chicago, Evanston and Lake Shore Railroad
	H7-b		Schen. 2962–2971	1889–1900	1927–1933	17 × 24	432×610	633NaN3	1802NaN2	168402NaN2
	H7-c		BLW 18555	1901	1928	17 × 24	432×610	683NaN3					Acquired from Davenport, Rock Island and Northwestern Railroad
	H7-d		BLW 18699	1901	1928	17 × 24	432×610	683NaN3					Acquired from Davenport, Rock Island and Northwestern Railroad
	H8		Rogers 6228–6232 Alco (4)	1904–1905	1934–1951	18 × 26	457×660	693NaN3	1802NaN2	192362NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroad

Class I: 0-6-0

Class I covered the 0-6-0 switcher types.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	I1		BLW 2391, 4330, 4340	1871, 1878	1917	16 × 24	406×310	503NaN3
	I2		Brooks 1340, 1673	1888, 1890	1918	17 × 24	432×310	503NaN3					Acquired with Milwaukee and Northern
	I3		Rhode Island 2621, 2622, 2624, 2702–2707	1891	1926–1945	18 × 24	457×310	503NaN3	1602NaN2	207362NaN2	Two rebuilt to 0-6-0ST as class I3-ax
	I4		Milwaukee Shops	1891–1895	1926–1928	18 × 24	457×310	513NaN3	1802NaN2	233302NaN2
	I4-a		Milwaukee Shops (38) BLW 16206–16210 (5)	1898–1902	1909–1944	18 × 24	457×310	513NaN3	1802NaN2	233302NaN2	One rebuilt to 0-6-0ST as class I-4ax
	I5		Milwaukee Shops	1902–1903	1931–1934	19 × 26	483×660	513NaN3	1802NaN2	281602NaN2
	I5-a		Milwaukee Shops	1903–1913	1933–1955	19 × 26	483×660	513NaN3	1802NaN2	281582NaN2	Two rebuilt to 0-6-0ST as class I-5ax
	I5-b		BLW 32423, 34354	1907, 1910	1934	19 × 26	483×660	513NaN3	1802NaN2	281582NaN2	Acquired with Chicago, Milwaukee and Gary
	I6-s		Milwaukee Shops	1913–1914	1948–1956	20 × 26	508×660	513NaN3	1802NaN2	312002NaN2

Class J: 0-4-0

Class J covered 0-4-0 switchers.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	J1		BLW 3488–3489	1873	1905	14 × 22	356×559	493NaN3
	J2		Brooks	1883–1887	1911–1917	16 × 22	406×559	483NaN3					Acquired with Milwaukee and Northern
	J2-a		various	1878–1882	1906–1930	16 × 22	406×559	503NaN3	1302NaN2	122002NaN2
	J3		Grant	1893	1918–1926	16 × 22	406×559	513NaN3	1602NaN2	150202NaN2

Class K: 2-6-2

Class K comprised 2-6-2 "Prairie" locomotives.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	K1		Alco (125) Milwaukee Road (70)	1907–1909	1935–1945	21 × 28	533×711	633NaN3	2002NaN2	333202NaN2	71 rebuilt to K1-as
	K1-as		Alco (41) Milwaukee Road (30)		1935–1955	21 × 28	546×711	633NaN3	1852NaN2	323102NaN2	rebuilt from K1
	K1-a		BLW 34918	1910	1927	17 × 24	432×610	443NaN3					Acquired with Puget Sound and Willapa Harbor Railroad. Sold to Cascade Timber Company

Class L: 2-8-2

Class L was for 2-8-2 "Mikado" locomotives.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	L1		Milwaukee Road	1909	1945–1954	24 × 30	610×762	633NaN3	2002NaN2	466302NaN2	2 locomotives superheated as L1-s
	L1-s		Milwaukee Road		1940	26 × 30	660×762	633NaN3	1852NaN2	506202NaN2
	L2		Milwaukee Road (40) Alco (140)	1912–1914	1935–1955	26 × 30	660×762	633NaN3	2002NaN2	547232NaN2	69 fitted with stokers as class L2-r
	L2a		BLW	1920	1949–1954	26 × 30	660×762	633NaN3	2002NaN2	547232NaN2
	L2b		BLW	1922–1923	1950–1956	26 × 30	660×762	633NaN3	2002NaN2	547232NaN2
	L3		Alco 59740–59789, 61042–61046, 61148–61192	1918–1919	1938–1956	27 × 32	686×813	633NaN3	2002NaN2	629492NaN2	USRA Heavy Mikado. 18 fitted with booster as class L3-a. One fitted with tender booster as class L3-b

Class M: 2-6-0

Class M was for the 2-6-0 type.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	M1		BLW	1905	1925, 1927	18 × 24	457×610	633NaN3	1902NaN2	199302NaN2	Acquired with Montana Railroad
	M1a		BLW	1891	1928	17 × 24	432×610	543NaN3					Acquired with Bellingham Bay and British Columbia Railroad
	M1b		BLW	1892	1930	20 × 24	508×610	513NaN3	1402NaN2	224002NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroad
	M1c		BLW	1901	1930	20 × 24	508×610	513NaN3	1602NaN2	256002NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroad, originally Southern Indiana Railroad
	M1d		Rogers	1904, 1905	1910–1934	20 × 24	508×610	513NaN3	1602NaN2	256002NaN2	Acquired with Chicago, Terre Haute and Southeastern Railroad, originally Southern Indiana Railroad.
	M1e		Alco	1904, 1905	1934	19 × 26	483×660	573NaN3	2002NaN2	279962NaN2	Acquired with Chicago, Milwaukee and Gary Railroad, originally, Illinois, Iowa and Minnesota Railroad.
	M2		Alco	1905, 1906	1927–1934	20 × 28	508×711	633NaN3	2002NaN2	302222NaN2	ex Chicago Junction.

Class N: 2-6-6-2

Class N consisted of articulated locomotives of 2-6-6-2 arrangement.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	N1		Alco-S 48838–48862	1910–1911	1928–1935	23 × 30 37 × 30	597×762 940×762	573NaN3	2002NaN2	70396lbf	Compound Mallet. 17 rebuilt to class N3
	N2		Alco-S 51057–51066, 52124–52129	1912	1934–1949	23 × 30 37 × 30	597×762 940×762	573NaN3	2002NaN2	70396lbf	Compound Mallet
	N3		Milwaukee Road (re-built)	1929–1931	1950–1954	21 × 30	546×762	573NaN3	2002NaN2	877202NaN2	Four cylinder simple articulated. Rebuilt from class N1

Class S: 4-8-4

Class S were 4-8-4 "Northern" locomotives.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	S1		BLW 61176 (1), Milwaukee Shops (1)	1930 (1), 1938 (1)	1954	28 × 30	711×762	742NaN2	2302NaN2	62136lbf
			BLW 62089–62118, 62344–62353	1937–1940	1954–1956	26 × 32	660×813	742NaN2	285psi	70816lbf
			Alco 71973–71982	1944	1954–1956	26 × 32	660×813	742NaN2	2502NaN2	62116lbf	Two preserved: (261) in Minneapolis, 265 at IRM

Class X: Shay

Class X covered Lima Shay's.

Image	Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
						in	mm	in	m	psi	MPa	lbf	kN
	Milwaukee Road class X1		Lima 2057	1908	after 1947	11 × 12		323NaN3	200		22,563 lbs		Class B, 50 Ton Shay. CM&StP 1499, renumbered as CM&StP 25 in 1912
	Milwaukee Road class X2		Lima 1912	6/1907	sold 1919	12 × 15		363NaN3	200		30,375 lbs		Class C, 3 truck shay. Acquired with the Idaho & Washington Northern Railroad as their #6. Renumbered as CM&StP 26 in 1916.

Diesel

ALCO

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1939	1961
				1940	1961
				1940	1965
				1940–50	1960-66
				1950–54	1966-76
				1941 (2); 1943 (2); 1953 (3)	1943 (2); 1967 (5)	First two requisitioned by US Army in 1943.
				1946–47	1967-76 (RSC-2) / 1976 (RSC-2m)	Three swapped trucks with RS-2s in 1955. Four others rebuilt by Alco to "RSC-2m" in 1965
				1949	1967-72	Three swapped trucks with RSC-2s in 1955
				1953–55	1966-76
				1953	1976
				1941	1962

Baldwin

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1940	1961
				1940–45	1965–72
				1948–49	1967-76
				1950–54	1968–76
				1951–52	1974–76
				1951–53	1967-76	Two were built as AS-616B models (rebuilt as AS-616 in 1953)

EMD

Switchers

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1939–41	1975–1983
				1939–1947	1981–1984
				1949	1978–1979
				1950	1984
				1950–1951	1980–1984
				1951	1982–1984
				1954	1980–(end)
				1975–76	(end)	all to Soo Line Railroad

Cab units

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1941	1961
				1946	1969
				1956	1973	Built to UP specification with steam generators for inter-city service.
				1961	1982	Built equipped with head end power for suburban service.
				1941–45	1959
				1949	1965
				1949–1953	1974–1984
				1950–1952	1976–1984	Five sets reassigned to freight service
				1954	1977–1982	Four A units re-equipped for suburban service

Cowl units

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1968	1982–1984	Built for intercity passenger train service. All five later re-equipped for freight train service after formation of Amtrak.
				1974		Built for suburban commuter passenger service. All later turned over to RTA when RTA assumed responsibility for suburban commuter passenger service. Two units remain in service with Metra in 2014. Model was unique to Milwaukee Road.

Hood units

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1952–53		17 rebuilt to "SD10"
				1954–59		54 rebuilt to "GP20m"
				1954		4 rebuilt to "SD10"
				1963	1984
				1965	1984
				1969–72		Model unique to the Milwaukee Road
				1966–69
				1968
				1972–74
				1973–74

Fairbanks-Morse

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1944–50	1978–81
				1950–55	1972–81
				1954–56	1967–76
				1953	1972-75	Railfan nickname - Baby Trainmaster
				1951	1966-67	6 ABA sets
				1946–48	1963	originally 6 ABA sets, 1 AA set

General Electric

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1940–1941	1958–1967
				1973	1984–1985
				1965	1966 (1), 1984 (11)	One unit wrecked at Whitman, Minnesota in 1966
				1966	1984
				1966–68	1980 (1), 1984 (9)
				1974	1985
				1968	1980 (1), 1982 (3)
				1972	1984–1985

Whitcomb

Image	Model	Milwaukee class	Quantity	Built	Retired	Notes
				1940–1941	1941 (1), 1954–68	380 hp, 1 sold to Purdue University in 1941
				1929-30	1944	built as 300 hp gas-electric, rebuilt to 650 hp diesel-electric in 1941; sold to US Government 1944

Electric

The Milwaukee Road was one of the most electrified railroads in the United States. The system used was 3,000 volt DC overhead line.

Switchers

• Milwaukee Road class ES-1 - 1 example (built 1915), the Great Falls, Montana switcher. Used 1,500 volts DC.
• Milwaukee Road class ES-2 - 4 examples (built 1916–19).

Passenger

• Milwaukee Road class EP-1 - 12 2-unit boxcab sets (24 locomotives) built in 1915 by ALCO/GE. Converted to freight class EF-1 in 1920. In 1950, two boxcab two-unit sets were converted for passenger service (class EP-1A).
• Milwaukee Road class EP-2 - The "Bi-Polars". 5 built by GE in 1919.
• Milwaukee Road class EP-3 - The "Quills" (quill drive). 10 built by Baldwin/Westinghouse in 1919.
• Milwaukee Road class EP-4 - "Little Joes". Two examples built by GE in 1946. Converted to freight class EF-4 in 1956.

Freight

• Milwaukee Road class EF-1 - 30 two-unit boxcab sets (60 locomotives) built in 1915 by ALCO/GE, identical to EP-1 but for gearing and paint. In addition, the EP-1 units were converted to EF-1 specification in 1920.
• Milwaukee Road class EF-2 - 3-unit boxcab sets formed from EF-1s in the 1930s.
• Milwaukee Road class EF-3 - 3-unit boxcab sets formed from EF-1s with the middle unit shortened by removing the cab and leading truck; the resultant B units were known as "bobtails".
• Milwaukee Road class EF-4 - "Little Joes". 10 examples built by GE in 1946 for the Soviet Ministry of Railways as Class A. In addition, the EP-4 locomotives were converted to EF-4 specification in 1956.
• Milwaukee Road class EF-5 - Four-unit boxcab sets formed with any combination of regular or bobtail units in the middle.

Rebuilds

Rebuilt EMD

Image	Model	Milwaukee class	Rebuilder	Total rebuilt	Rebuild date	Retired	Notes	Refs.
			Milwaukee Road's Milwaukee shops					^[1]
			Milwaukee Road's West Milwaukee shops

Preserved locomotives

Steam

Only six Milwaukee Road steam locomotives survive:

Image	MILW No.	Class	Type	Manufacturer	Serial No.	Date	Notes	Refs.
	111	—			73
					71974
					71978
				Milwaukee Shops	—	1885	Originally No. 37, renumbered 58 in 1898, then 1057 in 1899.
				Milwaukee Road (r/b)	19543		Rebuilt from class B4 no. 4335 (Baldwin 19543 of 1901) and numbered 2404; renumbered 1004 in 1938
				Milwaukee Shops	—		Originally 1207, renumbered 1416 in 1938; at EMTRAC in Evansville, Indiana.

In addition, the tender from a class S2 locomotive also survives in Ingomar, Montana.

Diesel

Image	MILW No.	Model	Class	Manufacturer	Rebuilder	Serial No.	Build date	Rebuild date	Current status	Notes	Refs.
	532			General Motors Electro-Motive Division (EMD)	Milwaukee Road's West Milwaukee shops	18780	February 1954	October 1975	Operational; Whitewater Valley Scenic Railroad at Connersville, Indiana		^[2]
	988			American Locomotive Company	Not rebuilt	75135	January 1947	Not rebuilt	On static display; Mid-Continent Railway Museum at North Freedom, Wisconsin		^[3]

Electric

• 10200A+B, later E50A+B - class EF-1 at the Lake Superior Railroad Museum in Duluth, Minnesota
• 10211B, later E57B - class ES-3 at Harlowton, Montana
• 10251, later E2 - class EP-2, at the National Museum of Transportation in St. Louis, Missouri
• E70 - class EF-4 at Deer Lodge, Montana

References

• Web site: Surviving Milwaukee Road Steam Locomotives . Steam Locomotive dot Com . Barris . Wes.
• Web site: Milwaukee Road All-time Diesel Roster, 1939-1993 . Hyde, Fred . Milwaukee Road Online . 2006-01-08 .
• Web site: Chicago Milwaukee St. Paul & Pacific . Ross, Don . Don's Rail Photos . 2006-01-09 .
• Edson . William D. . Spring 1977 . Milwaukee Road All Time Steam, Diesel and Electric Roster . Railroad History . 136 . 29–124 . The Railway and Locomotive Historical Society Inc. .

Notes and References

1. Book: Murray, Tom . The Milwaukee Road . 2005-10-29 . Voyageur Press . 978-0-7603-2072-3 . 117 . en.
2. Web site: Whitewater Valley Railroad - MILW 532 . https://web.archive.org/web/20110721001810/http://www.whitewatervalleyrr.org/roster/?op=details&id=6&cat=diesel&sid=f2c3c8f9ad351e3e36b3e52ebd3f1e5f . 2011-07-21.
3. Web site: Milwaukee Road #988 . 2024-05-08 . Mid-Continent Railway Museum . en-US.