List of Milwaukee Road locomotives

Locomotives of the Milwaukee Road, officially the Chicago, Milwaukee, St. Paul and Pacific Railroad.

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)
Diesel	ALCO, Baldwin, Davenport, EMD (Switchers, Cab units, Hood units), Fairbanks-Morse, General Electric, Whitcomb
Electric	Switchers, Passenger, Freight
References

Steam locomotives

Milwaukee Road steam locomotives were organized into classes by wheel arrangement.

Additional suffixes, where used indicated:

• s: fitted with 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.

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
A1	18	BLW	1896–1903	1934–1948	13 × 26 22 × 26	330×660 559×660	78	1.981	200	1.38	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	11	Milwaukee Road	1925–1929 (rebuilt)	1934–1948	19 × 26	483×660	79	2.007	200	1.38	20,197	89.84	Simple
A2	9	BLW	1901	1927–1929	15 × 28 25 × 28	381×711 635×711	84	2.134	200	1.38	20,420	90.83	Vauclain compound
A2-a	19	BLW	1902–1903	1927–1929	15 × 28 25 × 28	381×711 635×711	84	2.134	200	1.38	20,420	90.83	Vauclain compound
A2-b	5	Milwaukee Road	1907–1908	1927–1929	15 × 28 25 × 28	381×711 635×711	85	2.159	220	1.52	22,190	98.71	Compound
A2-c	12	BLW	1908–1909	1928–1930	15 × 28 25 × 28	381×711 635×711	85	2.159	220	1.52	22,190	98.71	Vauclain compound
A2	2	BLW 31274, 31275	1907	1951	15 × 28 25 × 28	381×711 635×711	85	2.159	220	1.52	22,200	98.75	Balanced compound, rebuilt simple as class A4-s
A4-s	2	Milwaukee Road	(rebuilt)	1951	22 × 28	559×711	79	2.007	200	1.38	29,160	129.71
A3-s	1	BLW 33778	1909	1951	22 × 28	559×711	73	1.854			25,240	112.27	Acquired with Idaho and Washington Northern Railroad. Rebuilt as class A4-as
A4-as	1	Milwaukee Road	(rebuilt)	1951	22 × 28	559×711	79	2.007	200	1.38	29,162	129.72
A	4	Alco	1935–1937	1949–1951	19 × 28	483×711	84	2.134	300	2.07	30,685	136.49	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.

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
B	1	BLW	1892	1914	12 × 26 20 × 26	305×660 508×660	62	1.575	190	1.31	15,600	69.39	Rebuilt to class G5-xs
B1	14	BLW	1895–1897	1913–1915	12½ × 26 21 × 26	318×660 533×660	62	1.575	200	1.38	C:17,950 S:21,540	C:79.85 S:95.81	All rebuilt to class G5-s
B2	37	BLW	1897–1899	1914–1925	13½× 26 23 × 26	343×660 584×660	62	1.575	200	1.38	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	7	BLW	1900	1915–1924	13½× 26 23 × 26	343×660 584×660	62	1.575	200	1.38	21,250	94.52	3 rebuilt to class G6-gs, 4 rebuilt to G6-n
B3-x	1	BLW	1899	1927	14 × 30 24 × 30	256×762 610×762	68	1.727	200	1.38	24,200	107.65	Scrapped
B3	25	BLW	1900	1915–1927	15 × 26 25 × 26	381×660 635×660	68	1.727	200	1.38	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	1	BLW	1899	1927	15 × 30 25 × 30	381×762 635×762	69	1.753	200	1.38	26,630	118.46	Scrapped
B4	16	BLW	1900	1921–1927	15 × 30 25 × 30	381×762 635×762	69	1.753	200	1.38	C:26,630 S:31,956	C:118.46 S:142.15	Narrow firebox. 10 rebuilt to class G7-as, 6 scrapped
B4	66	BLW	1901–1903	1915–1925	15 × 28 25 × 28	381×711 635×711	63	1.600	200	1.38	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.

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	2	BLW 19400–19401	1901	1934–1935	22 × 28	559×711	55	1.397	200	1.38	41,888	186.33
C1-b	2	BLW 19398–19399	1901	1934–1940	22 × 28	559×711	56	1.422	200	1.38	41,140	183.00	Later class C1-c
C1-c	65	Milwaukee Road	1904–1907	1934–1949	22 × 28	559×711	55	1.397	200	1.38	41,890	186.34
C1-d	10	Alco-Rogers	1908–1909	1934–1936	22 × 28	559×711	57	1.448	190	1.31	38,391	170.77	Acquired with Chicago, Terre Haute & Southeastern Railroad
C1-e	5	Alco-Brooks	1905	1934–1936	19½ × 28	495×711	57	1.448	200	1.38	31,754	141.25	Acquired with Chicago, Milwaukee & Gary Railroad; né Detroit Southern Railroad
C1-f	2	BLW 32441–32442	1907	1934	21 × 28	533×711	55	1.397	200	1.38	38,166	169.77	Acquired with Chicago, Milwaukee & Gary Railroad
C1-g	2	BLW 35425–35426	1910	1934	21 × 28	533×711	55	1.397	200	1.38	38,166	169.77	Acquired with Chicago, Milwaukee & Gary Railroad
C2	75	Milwaukee Road (25) BLW (50)	1909–1910	1936–1965	23 × 30	584×762	63	1.600	200	1.38	42,820	190.47
C3	2	BLW 32176, 32208	1907	1935	22 × 28	559×711	51	1.295	200	1.38	45,170	200.93	Acquired with Idaho and Washington Northern Railroad
C3-a	4	BLW	1910–1911	1934–1951	22 × 30	559×762	55	1.397	200	1.38	44,880	199.64	Acquired with Idaho and Washington Northern Railroad
C3-b	5	Alco-Rogers	1909	1945–1949	22 × 30	559×762	57	1.448	200	1.38	43,300	192.61
C4	1	BLW 24742	1904	1927	20 × 24	508×610	49	1.245					Acquired with Montana Railroad
C5	5	Milwaukee Road	1912	1951–1954	24 × 30	610×762	63	1.600	185	1.28	43,130	191.85
C5-a	45	Alco-Brooks (35) Milwaukee Road (10)	1912–13	1945–1954	24 × 30	610×762	63	1.600	185	1.28	43,130	191.85
C7	5	Alco-Schen	1910	1950–1953	25 × 32	635×813	61	1.549	180	1.24	50,163	223.14	Acquired with Chicago, Terre Haute & Southeastern Railroad
C7-a	12	Alco-Schen	1912–1918	1950–1953	25 × 32	635×813	61	1.549	180	1.24	50,163	223.14	Acquired with Chicago, Terre Haute & Southeastern Railroad
C9-a	1	Pittsburgh	1901	1921	19 × 24	483×610	50	1.270					Acquired with Tacoma Eastern Railroad
C9-b	1	BLW 5943	1881	1929	20 × 24	508×610	50	1.270	150	1.03	24,480	108.89	Acquired with Bellingham Bay and British Columbia Railroad
C9-c	1	BLW 13800	1893	1929	19 × 24	483×610	50	1.270	150	1.03	26,511	117.93	Acquired with Bellingham Bay and British Columbia Railroad
C9-d	1	BLW 24742	1904	1927	20 × 24	508×610	54	1.372					Acquired with Bellingham Bay and British Columbia Railroad
C9-d	1	BLW 13800	1906	1935	22 × 28	559×711	50	1.270	200	1.38	46,076	204.96	Acquired with Tacoma Eastern Railroad

Class D: 0-8-0

Class D was the 0-8-0 type.

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
D1	2	BLW 39758–39759	1913	1952	20 × 26	508×660	51	1.295	200	1.38	34,666	154.20	Acquired with Chicago, Terre Haute & Southeastern Railroad

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.

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	1	Schenectady 2855	1889	1926	19 × 24	483×610	68	1.727	180	1.24	19,490	86.70	Rebuild to G4-g class 4-6-0
F2 4-6-2	1	Milwaukee Road	1905	1929	23 × 26	584×660	72	1.829	200	1.38	34,470	153.33
F3 4-6-2	70	Alco-Brooks 47442–47491, 48714–47433	1910	1929–1954	23 × 28	584×711	79	2.007	200	1.38	31,870	141.76	All rebuilt to F3-s, F3-as or F3-bs. Two streamlined as F1 (second). One streamlined as F3 (second)
F4 4-6-2	70	Milwaukee Road	1910	1916–1954	23 × 28	584×711	69	1.753	200	1.38	36,490	162.32	All rebuilt to F4-b (2), F4-ms (17) or F5-bs (6).
F5 4-6-2	65 (+6)	Milwaukee Road (15 new, 6 rebuilt from F4) Alco-Brooks (50) 51134–51163, 51328–51347	1911–1912	1934–1954	25 × 28	635×711	69	1.753	185	1.28	39,880	177.40	All rebuilt to F5-b, F5-n or F3-an.
F6 4-6-4	14	BLW 61135–61148	1930	1952–1954	26 × 28	660×711	80	2.032	225	1.55	45,250	201.28
F6-a 4-6-4	8	BLW 61655–61662	1931	1952–1954	26 × 28	660×711	80	2.032	225	1.55	45,250	201.28
F7 4-6-4	6	Alco 69064–69069	1938	1949–1951	23½ × 30	597×762	84	2.134	300	2.07	50,194	223.27	Streamlined

Class G: 4-6-0

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

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
G1	1	Cooke	1892	1902	17 × 24	432×610	56	1.422	130	0.90	20,600	91.63	Acquired with Milwaukee and Superior Railroad
G2	4	Brooks 1333–1335, 1514	1888–1889	1925–1927	18 × 24	457×610	56	1.422					Acquired with Milwaukee and Northern Railroad
G2-a	2	Brooks 1707–1708	1890	1926	18 × 24	457×610	57	1.448					Acquired with Milwaukee and Northern Superior Railroad
G2-b	1	PRR's Logansport, Indiana shops	1888	1926	19 × 22	483×559	50	1.270					Acquired with Tacoma Eastern Railroad
G2-c	1	BLW 23673	1904	1931	18 × 24	457×610	63	1.600	200	1.38	20,980	93.32	Acquired with Tacoma Eastern Railroad
G3	7	R.I. 2548, 2635–2640	1891–1892	1926–1927	18 × 24	457×610	57	1.448	160	1.10	18,550	82.51
G4	1	Schen		1925	18 × 26	457×660	57	1.448					Acquired with Montana Railroad
G4-a	4	Brooks 1219–1220, 1255–1256	1887	1926–1928	18 × 24	457×610	51	1.295	150	1.03	19,440	86.47	Acquired with Milwaukee and Northern Railroad
G4-b	2	R.I. 3128–3129	1896	1927–1929	18 × 24	457×610	57	1.448	185	1.28	19,133	85.11	Acquired with Des Moines Northern and Western Railroad
G4-c	3	R.I. 1047, 1052–1053	1881	1926	19 × 26	483×660	62	1.575
G4-d	20	R.I. 1411–1430	1883	1926–1933	19 × 26	483×660	63	1.600	150	1.03	18,995	84.49
G4-e	101	R.I. (40); Schen (35); Brooks (1); Grant (25);	1885–1888	1926–1933	19 × 26	483×660	63	1.600	150	1.03	18,995	84.49
G4-f	7	BLW 15888–15891, 16017–16019	1898		18 × 24	457×610	51	1.295	180	1.24	20,872	92.84	Acquired with Chicago, Terre Haute and Southeastern Railroad, né Southern Indiana
G4-g	1	MILW's Milwaukee shops	1926 (rebuilt)	1930	19 × 24	483×610	68	1.727	180	1.24	19,494	86.71	Rebuilt from F1 class 4-6-2
G5	27	R.I.	1891	1925–1934	19 × 26	483×660	57	1.448	150	1.03	20,995	93.39	Eight sold to Montana Railroad in 1907; re-acquired with Montana Railroad in 1910.
G5-a	19	Schen 3302–3311 (10); BLW (9)	1890–1892	1926–1935	18 × 26	452×660	63	1.600	180	1.24	20,460	91.01
G5-b	1	R.I. 2151	1889	1926	19 × 24	483×610	64	1.626
G5-s	15	Milwaukee Road (re-builder)	1913–1915	1938–1945	19 × 26	483×660	63	1.600	180	1.24	22,794	101.39	Rebuilt from class B1
G5-c	1	BLW 32348	1907	1927	19 × 26	483×660	56	1.422					Acquired with Bellingham Bay and British Columbia Railroad
G5-d	3	Rogers 5386–5388	1899	1930–1934	18 × 26	457×660	51	1.295	190	1.31	26,676	118.66	Acquired with Chicago, Terre Haute and Southeastern Railroad; né Southern Indiana Railroad
G5-e	10	BLW	1903	1934	19 × 26	483×660	53	1.346	180	1.24	27,095	120.52	Acquired with Chicago, Terre Haute and Southeastern Railroad; né Southern Indiana Railroad
G6-a	28	Milwaukee Road's Milwaukee Shops	1905	1931–1936	20½ × 26	521×660	73	1.854	200	1.38	25,445	113.18	17 superheated as class G6-as
G6-b	5	Milwaukee Road's Milwaukee Shops	1907	1945–1948	20½ × 26	521×660	73	1.854	200	1.38	25,445	113.18	4 superheated as class G6-bs
G6-c	13	Alco-Brooks 45789–45801	1909	1930–1948	20½ × 26	521×660	73	1.854	200	1.38	25,445	113.18	11 superheated ad class G6-cs
G6-d	2	BLW 31269–31270	1907	1935	18 × 26	457×660	56	1.422	200	1.38	25,570	113.74	Acquired with Idaho and Washington Northern Railroad
G6-e	3	BLW 31648, 32119, 32764	1907–1908	1935	19 × 26	483×660	63	1.600	200	1.38	25,327	112.66	Acquired with Idaho and Washington Northern Railroad
G6-fs	18	Milwaukee Road (rebuilder)	1914–1918 (rebuilt)	1932–1954	20 × 26	508×660	63	1.600	180	1.24	25,260	112.36	Rebuilt from class B2
G6-gs	3	Milwaukee Road (rebuilder)	1915 (rebuilt)	1945–1953	20 × 26	508×660	63	1.600	180	1.24	25,257	112.35	Rebuilt from class B2
G6-h	1	Cooke 2252	1893	1930	21 × 26	533×660	63	1.600	180	1.24	31,326	139.34	Acquired with Tacoma Eastern Railroad
G6-k	3	BLW 23682, 26638, 28486	1904–1906	1926–1932	20 × 26	508×660	57	1.448	190	1.31	29,327	130.45	Acquired with Tacoma Eastern Railroad
G6-m	18	Milwaukee Road (rebuilder)	1921–1928 (rebuilt)	1950–1954	19 × 26	483×660	63	1.600	180	1.24	25,327	112.66	Rebuilt from class B2; all superheated as class G6-ms
G6-n	4	Milwaukee Road (rebuilder)	1921–24 (rebuilt)	1941–1952	19 × 26	483×660	63	1.600	180	1.24	25,327	112.66	Rebuilt from class B2; all superheated as class G6-ns
G6-os	4	Milwaukee Road (rebuilder)	1921 (rebuilt)	1949–1951	22 × 26	559×660	69	1.753	200	1.38	31,004	137.91	Rebuilt from class B3
G6-ps	12	Milwaukee Road (rebuilder)	1921–1927 (rebuilt)	1947–1954	22 × 26	559×660	69	1.753	200	1.38	31,004	137.91	Rebuilt from class B3; Two streamlined as class G 1937–1948
G6-s	10	Milwaukee Road (rebuilder)	1915–1918 (rebuilt)	1945–1951	22½ × 26	572×660	69	1.753	180	1.24	29,190	129.84	Rebuilt from class B3
G6-r	4	Alco-Rogers 37567–37572	1905	1934	19 × 26	483×660	57	1.448	190	1.31	26,554	118.12	Acquired with Chicago, Terre Haute and Southeastern Railroaad, né Chicago Southern Railroad
G7	81	Milwaukee Road's Milwaukee Shops	1904–1909	1928–1940	21 × 30	533×762	69	1.753	200	1.38	32,600	145.01	Seven superheated as class G7-s
G7-as	10	Milwaukee Road (rebuilder)	1921 (rebuilt)	1940–1954	21 × 30	533×762	69	1.753	200	1.38	32,595	144.99	Rebuilt from class B4
G7-bs	20	Milwaukee Road (rebuilder)	1915–1918 (rebuilt)	1950–1954	22 × 28	559×711	63	1.600	180	1.24	32,912	146.40	Rebuilt from class B4
G7-cs	4	Milwaukee Road (rebuilder)	1918–1920 (rebuilt)	1948–1954	22 × 28	559×711	63	1.600	180	1.24	32,912	146.40	Rebuilt from class B4
G8	25	Milwaukee Road (rebuilder)	1919–1920 (rebuilt)	1950–1957	22 × 28	559×711	63	1.600	200	1.38	36,568	162.66	Rebuilt from class B4
G8-a	15	Milwaukee Road (rebuilder)	1921–1925 (rebuilt)	1948–1956	22 × 28	559×711	63	1.600	200	1.38	36,568	162.66	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

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
H6	2	Brooks 1599–1600	1890	1926–1927	17 × 24	432×610	62	1.575					Acquired 1893 with Milwaukee and Northern
H6-b	3	Schen.3556–3557 R. I. 2797	1891–1892	1926–1930	17 × 24	432×610	62	1.575					Acquired 1899 with Des Moines and North Western
H6-c	4	Brooks 1432–1433, 1512–1513	1888–1889	1926	17 × 24	432×610	62	1.575					Acquired 1893 with Milwaukee and Northern
H6-d	31	R. I. 1687–1696 Brooks 1148 Cooke 1754–1763 Grant (10)	1886–1887	1926–1947	18 × 24	457×610	68	1.727	150	1.03	14,500	64.50
H7	18	R. I. 1272–1293, 1304–1306	1882–1883	1925–1932	18 × 24	457×610	63	1.600	150	1.03	15,705	69.86
H7-a	3	R. I. 1676–1678	1886	1928–1930	18 × 24	457×610	63	1.600	150	1.03	15,740	70.02	Acquired with Chicago, Evanston and Lake Shore Railroad
H7-b	10	Schen. 2962–2971	1889–1900	1927–1933	17 × 24	432×610	63	1.600	180	1.24	16,840	74.91
H7-c	1	BLW 18555	1901	1928	17 × 24	432×610	68	1.727					Acquired from Davenport, Rock Island and Northwestern Railroad
H7-d	1	BLW 18699	1901	1928	17 × 24	432×610	68	1.727					Acquired from Davenport, Rock Island and Northwestern Railroad
H8	9	Rogers 6228–6232 Alco (4)	1904–1905	1934–1951	18 × 26	457×660	69	1.753	180	1.24	19,236	85.57	Acquired with Chicago, Terre Haute and Southeastern Railroad

Class I: 0-6-0

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

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
I1	3	BLW 2391, 4330, 4340	1871, 1878	1917	16 × 24	406×310	50	1.270
I2	2	Brooks 1340, 1673	1888, 1890	1918	17 × 24	432×310	50	1.270					Acquired with Milwaukee and Northern
I3	9	Rhode Island 2621, 2622, 2624, 2702–2707	1891	1926–1945	18 × 24	457×310	50	1.270	160	1.10	20,736	92.24	Two rebuilt to 0-6-0ST as class I3-ax
I4	3	Milwaukee Shops	1891–1895	1926–1928	18 × 24	457×310	51	1.295	180	1.24	23,330	103.78
I4-a	43	Milwaukee Shops (38) BLW 16206–16210 (5)	1898–1902	1909–1944	18 × 24	457×310	51	1.295	180	1.24	23,330	103.78	One rebuilt to 0-6-0ST as class I-4ax
I5	6	Milwaukee Shops	1902–1903	1931–1934	19 × 26	483×660	51	1.295	180	1.24	28,160	125.26
I5-a	166	Milwaukee Shops	1903–1913	1933–1955	19 × 26	483×660	51	1.295	180	1.24	28,158	125.25	Two rebuilt to 0-6-0ST as class I-5ax
I5-b	2	BLW 32423, 34354	1907, 1910	1934	19 × 26	483×660	51	1.295	180	1.24	28,158	125.25	Acquired with Chicago, Milwaukee and Gary
I6-s	10	Milwaukee Shops	1913–1914	1948–1956	20 × 26	508×660	51	1.295	180	1.24	31,200	138.78

Class J: 0-4-0

Class J covered 0-4-0 switchers.

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
J1	2	BLW 3488–3489	1873	1905	14 × 22	356×559	49	1.245
J2	3	Brooks	1883–1887	1911–1917	16 × 22	406×559	48	1.219					Acquired with Milwaukee and Northern
J2-a	80	various	1878–1882	1906–1930	16 × 22	406×559	50	1.270	130	0.90	12,200	54.27
J3	5	Grant	1893	1918–1926	16 × 22	406×559	51	1.295	160	1.10	15,020	66.81

Class K: 2-6-2

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

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
K1	195	Alco (125) Milwaukee Road (70)	1907–1909	1935–1945	21 × 28	533×711	63	1.600	200	1.38	33,320	148.21	71 rebuilt to K1-as
K1-as	71	Alco (41) Milwaukee Road (30)		1935–1955	21½ × 28	546×711	63	1.600	185	1.28	32,310	143.72	rebuilt from K1
K1-a	1	BLW 34918	1910	1927	17 × 24	432×610	44	1.118					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.

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
L1	20	Milwaukee Road	1909	1945–1954	24 × 30	610×762	63	1.600	200	1.38	46,630	207.42	2 locomotives superheated as L1-s
L1-s	2	Milwaukee Road		1940	26 × 30	660×762	63	1.600	185	1.28	50,620	225.17
L2	180	Milwaukee Road (40) Alco (140)	1912–1914	1935–1955	26 × 30	660×762	63	1.600	200	1.38	54,723	243.42	69 fitted with stokers as class L2-r
L2a	100	BLW	1920	1949–1954	26 × 30	660×762	63	1.600	200	1.38	54,723	243.42
L2b	100	BLW	1922–1923	1950–1956	26 × 30	660×762	63	1.600	200	1.38	54,723	243.42
L3	100	Alco 59740–59789, 61042–61046, 61148–61192	1918–1919	1938–1956	27 × 32	686×813	63	1.600	200	1.38	62,949	280.01	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.

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
M1	2	BLW	1905	1925, 1927	18 × 24	457×610	63	1.600	190	1.31	19,930	88.65	Acquired with Montana Railroad
M1a	1	BLW	1891	1928	17 × 24	432×610	54	1.372					Acquired with Bellingham Bay and British Columbia Railroad
M1b	3	BLW	1892	1930	20 × 24	508×610	51	1.295	140	0.97	22,400	99.64	Acquired with Chicago, Terre Haute and Southeastern Railroad
M1c	2	BLW	1901	1930	20 × 24	508×610	51	1.295	160	1.10	25,600	113.87	Acquired with Chicago, Terre Haute and Southeastern Railroad, originally Southern Indiana Railroad
M1d	11	Rogers	1904, 1905	1910–1934	20 × 24	508×610	51	1.295	160	1.10	25,600	113.87	Acquired with Chicago, Terre Haute and Southeastern Railroad, originally Southern Indiana Railroad.
M1e	4	Alco	1904, 1905	1934	19 × 26	483×660	57	1.448	200	1.38	27,996	124.53	Acquired with Chicago, Milwaukee and Gary Railroad, originally, Illinois, Iowa and Minnesota Railroad.
M2	4	Alco	1905, 1906	1927–1934	20 × 28	508×711	63	1.600	200	1.38	30,222	134.43	ex Chicago Junction.

Class N: 2-6-6-2

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

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
N1	25	Alco-S 48838–48862	1910–1911	1928–1935	23½ × 30 37 × 30	597×762 940×762	57	1.448	200	1.38	70,396	313.14	Compound Mallet. 17 rebuilt to class N3
N2	16	Alco-S 51057–51066, 52124–52129	1912	1934–1949	23½ × 30 37 × 30	597×762 940×762	57	1.448	200	1.38	70,396	313.14	Compound Mallet
N3	17	Milwaukee Road (re-built)	1929–1931	1950–1954	21½ × 30	546×762	57	1.448	200	1.38	87,720	390.20	Four cylinder simple articulated. Rebuilt from class N1

Class S: 4-8-4

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

Class	Quantity	Builder	Built	Retired	Cylinders (bore × stroke)		Driver diameter		Boiler pressure		Tractive effort		Notes
					in	mm	in	m	psi	MPa	lbf	kN
S1	2	BLW 61176 (1), Milwaukee Shops (1)	1930 (1), 1938 (1)	1954	28 × 30	711×762	74	1.88	230	1.59	62,136	276.39
S2	40	BLW 62089–62118, 62344–62353	1937–1940	1954–1956	26 × 32	660×813	74	1.88	285	1.97	70,816	315.01
S3	10	Alco 71973–71982	1944	1954–1956	26 × 32	660×813	74	1.88	250	1.72	62,116	276.31	Two preserved: (261) at NRM, 265 at IRM

Class X: Shays

Class X consisted of Shay locomotives.

• Milwaukee Road class X1

Diesel locomotives

ALCO

Model	Milwaukee class	Quantity	Built	Retired	Notes
ALCO HH600	6-AS	2	1939	1961
ALCO HH660	6.6-AS	2	1940	1961
ALCO HH1000	10-AS	2	1940
Alco S-2	10-AS	31	1940–50
Alco S-4	10-AS	34	1950–54
ALCO RS-1	10-ARS	7	1941 (2); 1943 (2); 1953 (3)	1943 (2); 1967 (5)	Two requisitioned by US Army in 1943.
ALCO RSC-2	15-ARS	22	1946–47		Four rebuilt by Alco to RSC-25 in 1965
ALCO RS-3	16-ARS	21	1953–55
ALCO RSD-5	16-ARS	6	1953	1976
ALCO DL-107	20-AP	2	1941

Baldwin

Model	Milwaukee class	Quantity	Built	Retired	Notes
Baldwin VO-660	6.6-BS	1	1940	1961
Baldwin VO-1000	10-BS	12	1940–45	1967–1976
Baldwin DS-4-4-1000	10-BS	10	1948–49
Baldwin S-12	12-BS	21	1951–54	1969–1977
Baldwin RS-12	12-BRS	2	1951–52	1975–1976
Baldwin AS-616	16-BRS-6	8	1951–53		Two were built as AS-616B models

Davenport

Model	Milwaukee class	Quantity	Built	Retired	Notes
Davenport 44-ton		2	1942	1958, 1967	380 hp

EMD

Switchers

Model	Milwaukee class	Quantity	Built	Retired	Notes
EMD SW1	6-ES	25	1939–45	1975–1983
EMD NW2	10-ES	8	1939–1947	1981–1984
EMD TR2		2 units (1 A-B cow-calf set)	1949	1978–1979
EMD SW7	10-ES	1	1950	1984
EMD TR4		12 units (6 A-B cow-calf sets)	1950–1951	1980–1984
EMD SW9	12-ES	3	1951	1982–1984
EMD SW1200	12-ES	48	1954	1980–(end)
EMD MP15AC	15-ES	64	1975–76	(end)	all to Soo Line Railroad

Cab units

Model	Milwaukee class	Quantity	Built	Retired	Notes
EMD E6	20-EP	2 A units	1941	1961
EMD E7	20-EP	10 A units	1946	1969
EMD E9	24-EP	18 units (6 ABA sets)	1956	1973	Built to UP specification with steam generators for inter-city service.
EMD E9	24-EP	6 A units	1961	1982	Built equipped with head end power for suburban service.
EMD FT	13.5-EF	52 units (26 A-B semi-permanently coupled pairs, making up 13 ABBA sets)	1941–45	1959
EMD F3	15-EF	16 units (4 ABBA sets)	1949	1965
EMD F7	15-EF	118 units (68 A units, 50 B units)	1949–1953	1974–1984
EMD FP7	15-EP	32 (16 FP7-F7B-FP7 sets)	1950–1952	1976–1984	Five sets re-assigned to freight service
EMD F9	17.5-EF	12 units (6 AB sets)	1954	1977–1982	Four A units re-equipped for suburban service

Cowl units

Model	Milwaukee class	Quantity	Built	Retired	Notes
EMD FP45	36-EP-6	5	1968	1982–1984	all five re-equipped for freight service
EMD F40C		15	1974	2005	Built for suburban service. Model unique to the Milwaukee Road

Hood units

Model	Milwaukee class	Quantity	Built	Retired	Notes
EMD SD7	15-ERS-6	24	1952–53		17 rebuild to "SD10"
EMD GP9	17.5-ERS	128	1954–59
EMD SD9	17.5-ERS-6	14	1954		Four rebuilt to "SD10"
EMD GP30	22.5-ERS	16	1963	1984
EMD GP35	25-ERS	12	1965	1984
EMD SDL39	23-ERS-6	10	1969–72		Model unique to the Milwaukee Road
EMD GP40	30-ERS-4	72	1966–69
EMD SD45	36-ERS-6	10	1968
EMD SD40-2	30-ERS-6	90	1972–74
EMD GP38-2	20-ERS-2	16	1973–74

Fairbanks-Morse

Model	Milwaukee class	Quantity	Built	Retired	Notes
FM H-10-44	10-FS	24	1944–50	1978–1981
FM H-12-44	12-FS	48	1950–55	1975–1981
FM H-16-44	16-FRS	37	1954–56	1976–1979
FM H-16-66	16-FRS-6	6	1953	1976	Baby Trainmaster
FM CF-16-4	15-FF	18 (6 ABA sets)	1951	1960–68
FM Erie-built	20-FP	20 (14 A units, 6 B units: 6 ABA sets, 1 AA set)	1946–48	1959–1963

General Electric

Model	Milwaukee class	Quantity	Built	Retired	Notes
GE 44-ton	3.6-GS	3	1940–1941	1966–1967
GE U23B	23-GRS	5	1973	1984–1985
GE U25B	25-GRS	12	1965	1966 (1), 1984 (11)	One unit wrecked at Whitman, Minnesota in 1966
GE U28B	28-GRS	12	1966	1984
GE U30B	30-GRS	10	1966–68	1980 (1), 1984 (9)
GE U30C	30-GRS-6	8	1974	1985
GE U33C	33-GRS-6	4	1968	1980 (1), 1982 (3)
GE U36C	36-GRS-6	4	1972	1984–1985

Whitcomb

Model	Milwaukee class	Quantity	Built	Retired	Notes
Whitcomb 44-ton (B-B)		7	1940–1941		300 hp
Whitcomb 80-ton (1D1)		2	1929, 1930	1944	300 hp; sold to US Government

Electric locomotives

The Milwaukee 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 Twelve 2-unit boxcab sets (24 locomotives) built in 1915 by ALCO/GE. Converted to freight class EF-1 in 1920. In 1950, 2 boxcab 2-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". 2 examples built by GE in 1946. Converted to freight class EF-4 in 1956.

Freight

• Milwaukee Road class EF-1 Thirty 2-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. In addition the EP-4 locomotives were converted to EF-4 specification in 1956.
• Milwaukee Road class EF-5 4-unit boxcab sets formed with any combination of regular or bobtail units in the middle.

References

• Hyde, Fred. "Milwaukee Road All-time Diesel Roster, 1939-1993". Milwaukee Road Online. http://www.trainweb.org/milwaukee/roster.txt. Retrieved 2006-01-08. 
• Ross, Don. "Chicago Milwaukee St. Paul & Pacific". Don's Rail Photos. http://donsdepot.donrossgroup.net/indexmil.htm. Retrieved 2006-01-09. 
• Edson, William D. (Spring 1977). "Milwaukee Road All Time Steam, Diesel and Electric Roster". Railroad History (The Railway and Locomotive Historical Society Inc.) (136): 29–124.