Northern Pacific Railway Locomotives

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==Steam locomotive classes==
Below is a table of information for the Northern Pacific Railway’s steam roster with a symbol, Whyte notation, common name and notes. (The notes were compiled by Richard Boyland and Wes Barris and first posted May 30, 1991, to the electronic newsgroup rec.railroad.) Included is a breakdown of the Northern Pacific classes, along with the date of their first construction (when known), builder, and road numbers.
===0-4-0===
Class 	Wheel
arrangement	Fleet
number(s)	Manufacturer 	Serial
numbers	Year made 	Quantity
made	Quantity
preserved	Year(s) retired	Comments
0-4-0 — OO	0-4-0 — OO	0-4-0 — OO	0-4-0 — OO 	0-4-0 — OO 	0-4-0 — OO	0-4-0 — OO	0-4-0 — OO	0-4-0 — OO 	0-4-0 — OO
Minnetonka	0-4-0 	 	Smith and Porter	 	1870 	4 	1 	 	NP's first locomotives; Minnetonka preserved
H 	0-4-0 	1050–1064 	Baldwin 	4968...7053	1880–1883 	15 	0 	 	
H-1 	0-4-0 	1070 	Baldwin 	2537 	1871 	1 	0 	1926 	Rebuilt as 0-4-0T shop switcher 11
H-2 	0-4-0 	1003 	Rhode Island 	 	1883 	1 	0 	 	Ex St. Paul and Duluth Railroad 37
H-3 	0-4-0 	1004 	Rhode Island 	 	1883 	1 	0 	 	
H-4 	0-4-0 	1071 	Grant 	 	 	1 	0 	 	
H-5 	0-4-0 	1072 	Rhode Island 	 	 	1 	0 	 	
 	0-4-0T 	Shop 12 	Baldwin 	10231 	1889 	1 	0 	1936 	Ex HHS&S
 	0-4-0F 	Shop 8 	H. K. Porter 	7979 	1945 	1 	1 	 	Fireless locomotive for tie creosoting plant
===0-6-0===
Class 	Wheel
arrangement	Fleet
number(s)	Manufacturer 	Serial
numbers	Year made 	Quantity
made	Quantity
preserved	Year(s) retired	Comments
0-6-0 — OOO	0-6-0 — OOO	0-6-0 — OOO	0-6-0 — OOO 	0-6-0 — OOO	0-6-0 — OOO	0-6-0 — OOO	0-6-0 — OOO	0-6-0 — OOO 	0-6-0 — OOO
I 	0-6-0 	982–999 	Baldwin 	6685...8628	1883–1887 	18 	0 	 	
I-1 	0-6-0 	981 	NP 	 	1891 	1 	0 	 	
I-2 	0-6-0 	1000–1002 	Dickson 	611–613 	1887 	3 	0 	 	Ex St. Paul and Duluth Railroad 60–62
K-1 	0-6-0 	948–976 	Baldwin 	5565...6519	1881–1882 	29 	0 	 	Rebuilt from 2-6-0
K-2 	0-6-0 	980 	Baldwin 	6506 	1882 	1 	0 	 	Rebuilt from 2-6-0
L 	0-6-0 	977–979 	Baldwin 	6936...6946	1883 	3 	0 	 	
L-1 	0-6-0 	940–941 	Grant 	1784–1785 	1889 	2 	0 	 	
L-2 	0-6-0 	930–939 	Rome 	253...650 	1887–1890 	10 	0 	 	
L-3 	0-6-0 	929 	Rome 	506 	1889 	1 	0 	 	
L-4 	0-6-0 	926–928 	Baldwin 	14795–14797	1896 	3 	1 	 	Ex St. Paul and Duluth Railroad 70–72; 927 rebuilt as 0–6–0T shop switcher 10 preserved
L-5 	0-6-0 	923–925 	Rogers 	5424–5426 	1899 	3 	1 	 	Ex St. Paul and Duluth Railroad 73–75; 924 Under restoration Snoqualmie, Wa
L-6 	0-6-0 	900–919 	Schenectady 	59536–5955 	1901 	20 	0 	1928–1947 	914 rebuilt as 0–6–0T shop switcher 9 in 1931
L-7 	0-6-0 	1020–1035 	BaldwinAlco (Schen.)	20107...20775
27361–27366	1902–1903 	15 	1 	1929–1956 	1031 preserved
L-8 	0-6-0 	922 	Baldwin 	11372 	1890 	1 	0 	1938 	
L-9 	0-6-0 	1040–1134 	Alco (M / D / P)
Baldwin	39528...46914
29858...34609	1906–1910 	95 	2 	1930s–1950s 	1068 and 1070 preserved
L-10 	0-6-0 	1160–1169 	Alco (Schen.) 	52025–52034	1912 	10 	0 	1950s 	
===0-8-0===
Class 	Wheel
arrangement	Fleet
number(s)	Manufacturer 	Serial
numbers	Year made 	Quantity
made	Quantity
preserved	Year(s) retired	Comments
0-8-0 — OOOO	0-8-0 — OOOO	0-8-0 — OOOO	0-8-0 — OOOO 	0-8-0 — OOOO	0-8-0 — OOOO 	0-8-0 — OOOO	0-8-0 — OOOO	0-8-0 — OOOO 	0-8-0 — OOOO
G 	0-8-0 	1151–1159 	NP 	 	1906 (rebuilt)	9 	0 	1929–1937 	Rebuilt from class F 2-8-0 locomotives
G-1 	0-8-0 	1170–1173 	Alco (Brooks)	61229–61232 	1919 	4 	0 	1950s 	USRA 0-8-0
G-2 	0-8-0 	1174–1193 	Alco (Brooks)	62473–62492 	1920 	20 	0 	1950s 	USRA 0-8-0 copies
===2-6-0===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul	2-6-0 — oOOO — Mogul
D 	2-6-0 	580–591 	Baldwin 	6851...6909 	1883 	12 	0 	 	
D-1 	2-6-0 	942–947 	Baldwin 	5636...5701 	1881 	6 	0 	 	Rebuilt as 0–6–0
D-2 	2-6-0 	550–572 	Baldwin 	9544...9688 	1888–1889 	23 	0 	 	
D-3 	2-6-0 	420–424, 450–547 	Baldwin 	10178...11984 	1899–1891 	103 	0 	 	
D-5 	2-6-0 	404–418, 426–432 	Baldwin 	10298...11968 	1899–1891 	22 	0 	 	
D-6 	2-6-0 	400–403 	Rogers 	4842...5433 	1893–1899 	4 	0 	 	Ex St. Paul and Duluth Railroad 63–66
K 	2-6-0 	595–599 	Baldwin 	6590...6629 	1883 	5 	0 	 	
===2-6-2===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie	2-6-2 — oOOOo — Prairie
T 	2-6-2 	2300–2449 	Alco (Brooks) 	39508...42264 	1906–1907 	150 	1 	1924–1959 	6 rebuilt as class W-4 (2-8-2); 18 rebuilt as class T-1 2435 survives
T-1 	2-6-2 	2450–2467 	NP 	 	1926–1929 (rebuilt) 	18 	0 	1941–1959 	Rebuilt from class T
===2-8-0===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation	2-8-0 — oOOOO — Consolidation
F 	2-8-0 	95–103 	Baldwin 	6591...7002 	1883 	9 	0 	 	Rebuilt to class G (0–8–0) in 1906
F-1 	2-8-0 	50–81 	Baldwin 	9505...11959 	1888–1891 	32 	0 	1926–1951 	
F-2 	2-8-0 	82–83 	Baldwin 	 	1888 	2 	0 	1927–1928 	
F-3 	2-8-0 	84–91 	Rome 	455...651 	1889–1890 	8 	0 	1920s/30s 	
F-4 	2-8-0 	92–94 	Grant 	1714–1716 	1887 	3 	0 	 	
F-5 	2-8-0 	45–46 	Schenectady 	 	1900 	2 	0 	1926 	Ex Seattle and International Railway 11–12; Rebuilt as 0–8–0
F-6 	2-8-0 	47 	Richmond 	 	1895 	1 	0 	1927 	Ex Seattle and International Railway 8; Rebuilt as 0–8–0
F-7 	2-8-0 	48–49 	Rhode Island 	1882–1883 	1888 	2 	0 	 	Ex Seattle and International Railway 7 & 9
F-8 	2-8-0 	4–6 	PRR Altoona 	 	1891 	3 	0 	 	
Y 	2-8-0 	30–43 	Schenectady 	4900...4913 	1898 	14 	0 	1941–1955 	
Y-1 	2-8-0 	17–29 	Schenectady 	5468–5480 	1899–1900 	13 	1 	1925–1958 	25 preserved
Y-2 	2-8-0 	1250–1279 	SchenectadyAlco (Richmond) 	5881–5892
25815–25832 	1901–1902 	30 	0 	1925–1958 	
Y-3 	2-8-0 	1200–1213 	Schenectady 	5893–5906 	1901 	14 	0 	1945–1955 	
Y-4 	2-8-0 	1280–1293 	Alco (Schen.) 	27347–27360 	1903 	14 	0 	1925–1935 	
Y-5 	2-8-0 	1214–1223 	Alco (Schen.) 	27337–27346 	1903 	10 	0 	1927–1937 	
===2-8-2===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado	2-8-2 — oOOOOo — Mikado
W 	2-8-2 	1500–1659 	Alco (Brooks) 	30203...42234 	1904–1907 	160 	0 	1930–1959 	
W-1 	2-8-2 	1660–1699 	Alco (Schen.) 	46840–46879 	1910 	40 	0 	1925–1958 	
W-2 	2-8-2 	1900–1919 	Alco (Brooks) 	30222...31134 	1904–1905 	20 	0 	1930–1958 	Built as tandem compound locomotives
W-3 	2-8-2 	1700–1834 	Alco (Brooks) 	52849...62466 	1913–1920 	135 	1 	1926–1960 	Ten sold to Spokane, Portland and Seattle Railway as their 530–539; 539 is preserved. No. 1776 pulled the farewell to steam excursions for the NP in 1957.
W-4 	2-8-2 	2500–2505 	NP (Brainerd Shops) 	 	1919 (rebuilt) 	6 	0 	1955–1958 	Rebuilt from class T 2-6-2 locomotives
W-5 	2-8-2 	1835–1859 	Alco (Schen.) 	64348–64372 	1923 	25 	0 	1952–1960 	
===2-10-0===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod	2-10-0 — oOOOOO — Decapod
M 	2-10-0 	1–2 	Baldwin 	8168–8169 	1886 	2 	0 	1930–1933 	
On the NP the Decapods were used at either end of a very short train over the temporary switchback line across Stampede Pass while Stampede Tunnel was being constructed between 1887 and 1888. They featured blind drivers (no flanges on the wheels) for operation on sharp curves. They were later relegated to use as yard switchers.
===4-4-0===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American	4-4-0 — ooOO — American
25½C 	4-4-0 	3–26 	Baldwin 	2639...2662 	1871–1873 	23 	1 	 	21 sold in 1877 to the Canadian Pacific Railway and became CPR no. 1 Countess of Dufferin, and is preserved as such.
B 	4-4-0 	650–671 	Baldwin 	8560...8688 	1887 	22 	0 	 	
B-1 	4-4-0 	672–673 	Baldwin 	10247...10252 	1889 	2 	0 	 	
B-2 	4-4-0 	649 	Schenectady 	 	1887 	1 	0 	 	
B-3 	4-4-0 	691–692 	Grant 	1783, 1780 	1888 	2 	0 	 	
C-1 	4-4-0 	680–691 	New York 	35–46 	1883 	12 	1 	 	684 preserved
C-2 	4-4-0 	694–695 	Baldwin 	6581...6583 	1883 	2 	0 	 	
C-3 	4-4-0 	696–740 	Baldwin 	6535...10692 	1883–1890 	45 	0 	 	
C-4 	4-4-0 	741–742 	Baldwin 	5997...5999 	1882 	2 	0 	 	
C-5 	4-4-0 	743–747 	New York 	6–10 	1883 	15 	0 	 	
C-6 	4-4-0 	748–803 	Portland 	463–518 	1888 	56 	0 	 	
C-7 	4-4-0 	817–818 	Pittsburgh 	862 	1888 	1 	0 	 	
C-8 	4-4-0 	805–806 	Taunton 	829–830 	1882 	2 	0 	 	
C-9 	4-4-0 	807–816 	Hinkley 	1548...1560 	1882 	10 	0 	 	
C-10 	4-4-0 	817–818 	Baldwin 	5714...5902 	1881 	2 	0 	 	
C-11 	4-4-0 	819–865 	Baldwin 	4584...6523 	1879–1883 	47 	0 	 	
C-12 	4-4-0 	866–869 	Manchester 	868–871 	1880–1881 	4 	0 	 	
C-13 	4-4-0 	870–898 	Portland 	376...461 	1881–1883 	29 	0 	 	
C-14 	4-4-0 	899 	Baldwin 	5715 	1881 	1 	0 	 	
C-19 	4-4-0 	675–678 	Rome 	249–252 	1887 	4 	0 	 	
C-20 	4-4-0 	633–637 	Dickson 	605–609 	1887 	5 	0 	 	Ex St. Paul and Duluth Railroad 54–58
C-21 	4-4-0 	638–640 	Rome 	350–352 	1888 	3 	0 	 	Ex St. Paul and Duluth Railroad 67–69
C-22 	4-4-0 	1110–1118 	Brooks 	1105...1198 	1886 	8 	0 	 	Ex St. Paul and Duluth Railroad 41–48
C-23 	4-4-0 	1123–1128 	Rogers 	2945–2948 	1883 	4 	0 	 	Ex St. Paul and Duluth Railroad 18–21
C-24 	4-4-0 	1129–1130 	McQueen 	 	1881 	2 	0 	 	
C-25 	4-4-0 	1131–1134 	Baldwin 	 	1879 	4 	0 	 	
C-26 	4-4-0 	1135–1136 	Baldwin 	 	1870 	2 	0 	 	
C-27 	4-4-0 	1137 	Baldwin 	 	1870 	1 	0 	 	
C-28 	4-4-0 	1138–1139 	Baldwin 	 	1871 	2 	0 	 	
C-29 	4-4-0 	1140–1144 	Baldwin 	 	1874 	5 	0 	 	
C-30 	4-4-0 	1145–1148 	Rhode Island 	1779...1937 	1887–1888 	4 	0 	 	Ex Seattle and International Railway 1–4
C-31 	4-4-0 	1149–1150 	Rhode Island 	2085–2086 	1888 	1 	0 	 	Ex Seattle and International Railway 101–102
C-32 	4-4-0 	1151 	Baldwin 	 	 	1 	0 	 	
C-33 	4-4-0 	1153 	 	 	 	1 	0 	 	
===4-4-2===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic	4-4-2 — ooOOo — Atlantic
N 	4-4-2 	600–602 	Baldwin 	17290–17292 	1899 	3 	0 	1927–1932 	Ex St. Paul and Duluth Railroad 80–82
N-1 	4-4-2 	603–605 	Baldwin 	33291–33293 	1909 	3 	0 	1936 	
===4-6-0===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler	4-6-0 — ooOOO — Ten-Wheeler
E 	4-6-0 	390–398 	Baldwin 	6392...7021 	1882 	9 	0 	1910s 	
E-1 	4-6-0 	360–364 	Manchester 	1407–1411 	1888 	5 	0 	 	
E-2 	4-6-0 	370–383 	Baldwin 	9691...9704 	1888 	14 	0 	1926–1932 	
E-3 	4-6-0 	330–358 	Baldwin 	10182...11301 	1889–1890 	29 	0 	1925–1935 	
E-4 	4-6-0 	388–389 	Rhode Island 	2432–2433 	1890 	2 	0 	 	
E-5 	4-6-0 	386–387 	Schenectady 	4072–4073 	1893 	2 	0 	1927 	
E-6 	4-6-0 	365 	Rhode Island 	2337 	1890 	1 	0 	 	
E-7 	4-6-0 	366–368 	Cooke 	2223–2225 	1892 	3 	0 	 	
E-8 	4-6-0 	369 	Baldwin 	11280 	1890 	1 	0 	1919 	
P 	4-6-0 	250–258, 270–278 	Schenectady 	4542...4726 	1897–1898 	18 	0 	1926–1941 	
P-1 	4-6-0 	207–218, 226–236 	SchenectadyAlco (Schen.) 	5122...5931,
25660...25841 	1899–1902 	23 	0 	1927–1940 	
P-2 	4-6-0 	240–249 	SchenectadyAlco (Schen.) 	5716...5929,
25657...25842 	1901–1902 	10 	0 	1935–1941 	
P-3 	4-6-0 	1400–1419 	SchenectadyAlco (Rich.) 	5916–5925,
25662–25671 	1901–1902 	20 	0 	1920s 	
R 	4-6-0 	170–189 	Schenectady 	4535...4593 	1897 	20 	0 	1920s 	
S 	4-6-0 	153–168 	Schenectady 	4727...4899 	1898 	16 	0 	1920s 	
S-1 	4-6-0 	134–147 	Schenectady 	5134...5147 	1899 	14 	0 	1926–1929 	
S-2 	4-6-0 	104–133 	Schenectady 	5473...5612 	1900 	30 	0 	1925–1928 	
S-3 	4-6-0 	1300–1323 	SchenectadyAlco (Schen.) 	5907–5915,
25650...25840 	1901–1902 	24 	0 	1926–1934 	
S-4 	4-6-0 	1350–1399 	Baldwin 	20273...20662 	1907 	40 	4 	1945–1958 	1354, 1356, 1364 and 1382 preserved
S-10 	4-6-0 	320–329 	Alco (Rogers) 	37575–37584 	1907 	10 	1 	1930–1950 	328 preserved
S-11 	4-6-0 	150–152 	Grant 	1766–1768 	1888 	3 	0 	 	
===4-6-2===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific	4-6-2 — ooOOOo — Pacific
Q 	4-6-2 	2080–2099 	Alco 	27317–27336 	1903 	20 	0 	1929–1947 	
Q-1 	4-6-2 	2100–2147 	Alco 	30228...42501 	1904–1907 	48 	0 	1930–1952 	
Q-2 	4-6-2 	2175–2176 	Alco 	39999–40000 	1906 	2 	0 	1934 	Built as Cole balanced compounds
Q-3 	4-6-2 	2148–2170 	Baldwin 	33248...33627 	1909 	23 	4 	1945–1959 	2152, 2153, 2156 and 2164 preserved
Q-4 	4-6-2 	2177–2207 	Baldwin 	33796...34144 	1909–1910 	31 	0 	1931–1959 	
Q-4 	4-6-2 	2208–2225 	Alco 	48186–48203 	1910 	18 	0 	1931–1959 	
Q-5 	4-6-2 	2226–2235 	Alco 	62422–62441 	1920 	20 	0 	1947–1959 	
Q-6 	4-6-2 	2246–2265 	Alco 	64328–64347 	1923 	20 	0 	1953–1959 	
===4-8-0===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
Numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon	4-8-0 — ooOOOO Twelve-Wheeler or Mastodon
X 	4-8-0 	13–16 	Schenectady 	4523–4526 	1897 	4 	0 	1936–1940 	
===4-8-4===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern	4-8-4 — ooOOOOoo — Northern
A 	4-8-4 	2600–2611 	Alco 	67010–67021 	1926 	12 	0 	1949–1959 	Serial nos. not in order
A-1 	4-8-4 	2626 	Alco 	68056 	1930 	1 	0 	1955 	ex-Timken 1111
A-2 	4-8-4 	2650–2659 	Baldwin 	61771–61780 	1934–1935 	10 	0 	1953–1958 	
A-3 	4-8-4 	2660–2667 	Baldwin 	62163–62170 	1938 	8 	0 	1954–1958 	
A-4 	4-8-4 	2670–2677 	Baldwin 	64155–64162 	1941 	8 	0 	1954–1958 	
A-5 	4-8-4 	2680–2689 	Baldwin 	64667–64676 	1943 	10 	0 	1957–1959 	
===Mallet and simple articulated locomotives===
Class 	Wheel
arrangement 	Fleet
number(s) 	Manufacturer 	Serial
numbers 	Year made 	Quantity
made 	Quantity
preserved 	Year(s) retired 	Comments
Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives	Mallet and Simple Articulated Locomotives
Z 	2-6-6-2 	3000–3015 	Baldwin 	30566...31557 	1907 	16 	0 	1927–1939 	
Z-1 	2-6-6-2 	3100–3105 	Baldwin 	34389...34483 	1910 	6 	0 	 	
Z-2 	2-8-8-2 	4000–4004 	Baldwin 	34382–34386 	1910 	5 	0 	1945 	
Z-3 	2-8-8-2 	4005–4025 	Alco 	52839...62472 	1913, 1917, 1920 	21 	0 	1945–1958 	
Z-4 	2-8-8-2 	4500–4503 	Alco 	64373–64376 	1923 	4 	0 	1951–1954 	
Z-5 	2-8-8-4 	5000 	Alco 	67578 	1928 	1 	0 	1952 	
Z-5 	2-8-8-4 	5001–5011 	Baldwin 	61292...61495 	1930 	11 	0 	1953–1957 	
Z-6 	4-6-6-4 	5100–5120 	Alco 	68760–68780 	1936–1937 	21 	0 	1955–1959 	
Z-7 	4-6-6-4 	5121–5126 	Alco 	69540–69545 	1941 	6 	0 	1956–1959 	
Z-8 	4-6-6-4 	5130–5149 	Alco 	70143...71962 	1943–44 	20 	0 	1955–1959 	
Both of the Northern Pacific's 2-6-6-2 classes were copies of GN designs, including their Belpaire fireboxes, a rarity on NP steam locomotives. NP 3015, last of the Class Z's, had a troubled existence, suffering a crown sheet failure at Kennedy, Washington, on Stampede Pass circa 1916, then later derailing on the Wallace Branch in Idaho in 1933. In both instances the engine crew members were killed or injured.
The Z-2 2-8-8-2s wound up in helper service on Bozeman Pass. The Z-3s, purchased in successive batches, became the main line road and helper power on the route across Stampede Pass until the arrival of EMD's FTs in April, 1944. They were also used as helpers on the steep ascent of the NP's Prairie Line out of Tacoma, Washington, as well as in hauling wartime munitions trains over Stimson Hill between Elma, Washington and the Puget Sound Naval Shipyard at Bremerton, Washington, circa 1944–1945.
The Z-5 Yellowstones were two locomotives under one boiler, these were the largest locomotives in the world when delivered in 1928. They eliminated the use of two locomotives on the head-end of freight trains on the Yellowstone Division in eastern Montana and western North Dakota. The 2-8-8-4 was first built for the Northern Pacific Railway in 1928.
The 4-6-6-4 locomotives were so large that in many places in Montana the Northern Pacific had to widen the centers of its double track on the Rocky Mountain Division. As a rule they did not work west of Easton, Washington, due to the confines of Stampede Tunnel under the summit of Stampede Pass. Despite the inaccuracy, these classes were generally referred to by NP engine crews as Mallets.
==Diesel locomotives==
===American Locomotive Company===
Northern Pacific Railway's Alcos were mostly confined to the east end of the road, on the Lake Superior and St. Paul Divisions.
Model 	hp 	Quantity	Built 	Road numbers	Notes
HH-660	660 	3 	1940 	600–602 	Delivered as 125–127; first two sold to NP subsidiary Walla Walla Valley Railway
S-1 	660 	1 	1945 	603 	Delivered as 131
S-2 	1000	13 	1941–1949	700–712 	Delivered as 107–108, 113–118, 150–152
S-4 	1000	12 	1951–1953	713–724 	
S-6 	900 	1 	1955 	750 	
RS-1 	1000	4 	1945 	800–803 	Delivered as 155–158
RS-3 	1600	14 	1953–1955	850–863 	
RS-11 	1800	18 	1958–1960	900–917 	
===Baldwin Locomotive Works===
Model 	hp 	Quantity	Built 	Road numbers	Notes
VO-660 	660 	3 	1940–1942	650–652 	Delivered as 128–130
VO-1000 	1000	28 	1941–1945	400–427 	Delivered as 109–112, 119–124, 153–154, 159–174
DRS 4-4-1500	1500	2 	1948 	500–501 	Delivered as 175–176. Rebuilt 1959 and 1966 with EMD 567 engine
DRS 6-6-1500	1500	1 	1948 	525 	Delivered as 177. Rebuilt 1959 with EMD 567 engine
===Electro-Motive Division===
Model 	hp 	Quantity	Built 	Road numbers 	Notes
NW 	1000	1 	1938 	100 	Rebuilt 1956 by EMD as SW900m
NW2 	1000	7 	1940–1948	99, 101–106 	99 was New York, Ontario and Western 115, bought 1957
SW7 	1200	8 	1949 	107–114 	
SW9 	1200	4 	1952–1953	115–118 	
SW1200	1200	59 	1955–1957	119–177 	
GP7 	1500	20 	1950–1953	550–569 	
GP9 	1750	176 	1954–1958	200–375 	
GP18 	1800	9 	1960 	376–384 	
FT 	1350	22 A,
22 B	1944 	5400ABCD–5410ABCD 	Delivered as 6000ABCD–6010ABCD
F3 	1500	25 A
24 B	1947–1948	6000A-6004C, 6005B-6006C, 6500A-6509C, 6005A-6006D, 6051A-6052A, 6503C-6506C 	6000s are freight, 6500s are passenger
F7 	1500	45 A
34 B	1947–1952	6007A-6012D, 6007B-6012B, 6013D-6018D, 6013C-6018C, 6019D-6020D, 6019C-6020C, 6050B, 6500C, 6501C-6502C, 6507C-6508C, 6509C-6512C, 6510B-6512B, 6513C, 6513B, 6550B, 6551B-6553B, 	6000s are freight, 6500s are passenger
FP7 	1500	2 	1952 	6600–6601 	Used on St. Paul to Winnipeg passenger train
F9 	1750	39 A
32 B	1949–1956	6700C, 6700B, 6700C, 6701C, 6701B, 6702A-6704A, 6702B-6703B, 6702C, 6703A-6705A, 6703C, 6704B-6709B, 6704C, 6705C, 6706A, 6706C, 6707A, 6707C, 6710B, 7000D-7001D, 7000C-7001C, 7002D-7006D, 7002C-7006C, 7007D, 7007C, 7008D-7009D, 7008C-7009C, 7010D-7014D, 7010C-7014C, 7050A, 7051A-7051A	6700s are passenger, 7000s are freight. 7003D is preserved at the Oklahoma Railway Museum in Oklahoma City, lettered as Frisco 814. 7012A donated to Western Forest Industries Museum / Mt Rainier Scenic RR in Mineral, WA.
SD45 	3600	30 	1966–1968	3600–3629 	20 more on order at merger into Burlington Northern
===General Electric===
Model 	hp 	Quantity	Built 	Road numbers	Notes
44-Ton	380 	1 	1946 	98 	South Tacoma shops switcher
44-Ton	400 	1 	1943 	99 	Ordered by NP subsidiary Duluth Union Depot and Transfer; temporarily delivered to NP while DUDT resolved labor issues, then transferred to them as No. 5
U-25C 	2500	30 	1964–1965	2500–2529 	
U-28C 	2800	12 	1966 	2800–2811 	
U-33C 	3300	10 	1969 	3300–3309 	
*Schrenk, Lorenz P., and Frey, Robert L. (1997). Northern Pacific Classic Steam Era. Mukilteo, Washington: Hundman Publishing.
*Schrenk, Lorenz P., and Frey, Robert L. (1985). Northern Pacific Railway Supersteam Era 1925–1945. San Marino, California: Golden West Books.
Category:Northern Pacific locomotives
Category:Lists
Category:Locomotive Roster