Union Pacific Railroad
Timeline of Motive Power, 1915-1933
(Return to UP Steam Roster Index Page)
(Return to UP Diesel Roster Index Page)
On March 1, 1915, Union Pacific put into effect a "Systemwide Numbering Plan" that would essentially renumber almost every locomotive, freight car, passenger car, and caboose owned by the railroad and its several subsidiaries.
1915
1,646 total steam on 1 January 1915
(No purchases)
| Retired (4) | 3 | 0-6-0 | UP 4313, 4316, 4335 |
| 1 | 4-6-0 | UP 1220 |
1916
1,642 total steam on 1 January 1916
| Added (10) | 10 | 0-6-0 | UP 4421-4430 |
| Retired (16) | 10 | 0-6-0 | UP 4300, 4301, 4302, 4303, 4304, 4305, 4307, 4317, 4328, 4333 |
| 2 | 2-8-0 | UP 140, 142 | |
| 4 | 4-4-0 | UP 911, 936, 1000, 1001 |
1917
1,636 total steam on 1 January 1917
| Added (40) | 30 | 2-8-2 | UP 2260-2265, 2267, 2269-2274, 2276, 2279, 2528-2532, 2709-2715, 2733-2735 |
| 10 | 2-10-2 | UP 5000-5009 | |
| Retired (6) | 2 | 0-6-0 | UP 4320, 4321 |
| 3 | 2-8-0 | UP 500, 501, 502 | |
| 1 | 4-4-0 | UP 1002 |
UP 2-8-8-2s 3600-3602 were sold to OSL in 1917; assigned as helper locomotives on Kings Hill eastbound out of Glenns Ferry, Idaho.
1918
1,670 total steam on 1 January 1918
| Added (113) | 20 | 0-6-0 | UP 4431-4450 |
| 10 | 0-6-0 | UP 4600-4609 (USRA pattern) | |
| 5 | 0-6-0 | OSL 4748-4752 | |
| 56 | 2-8-2 | UP 2166-2171, 2280-2294, 2311-2320, 2480-2499, 2535-2539 | |
| 6 | 2-10-2 | LA&SL 3800-3805 (to OSL 5300-5305 within a year) | |
| 16 | 2-8-8-0 | UP 3600-3614, OSL 3703 | |
| Retired (7) | 3 | 0-6-0 | UP 4311, 4315, 4334 |
| 4 | 4-4-0 | UP 912, 913, 917, 925 |
Seven OSL 2500 series 2-8-2s were transferred to LA&SL as LA&SL 3700 series, later LA&SL 2700 series
Seven LA&SL 3700 series 2-8-2s were transferred to OSL as OSL 2500 series
One OSL 3700 series 2-8-8-0 was transferred to UP as a UP 3600 series
1919
1,776 total steam on 1 January 1919
| Added (32) | 5 | 0-6-0 | UP 4753-4757 |
| 15 | 2-8-2 | UP 2540-2554 | |
| 7 | 4-6-2 | UP 3134-3138, 3226, 3227 | |
| 5 | 2-10-2 | UP 5010-5014 | |
| Retired (1) | 1 | 4-4-0 | UP 907 |
1920
1,807 total steam on 1 January 1920
| Added (100) | 30 | 0-6-0 | UP 4451-4480 |
| 16 | 2-8-2 | UP 2295-2310 | |
| 10 | 4-6-2 | UP 2900-2909 | |
| 25 | 2-10-2 | UP 5015-5039 | |
| 19 | 2-8-8-0 | UP 3615-3633 | |
| Retired (1) | 1 | 4-6-0 | UP 1705 |
UP 4451-4460 (USRA 0-6-0) renumbered to UP 4600-4609 to clear the 4400 series for additional CS pattern 0-6-0s
Six LA&SL 3800 series 2-10-2s were transferred to OSL as OSL 5300 series
1921
1,906 total steam on 1 January 1921
| Added (14) | 4 | 0-6-0 | UP 4243-4246 |
| 10 | 2-8-2 | UP 2555-2564 | |
| Retired (56) | 8 | 0-6-0 | UP 4310, 4312, 4319, 4325, 4330, 4331, 4336, 4337 |
| 6 | 2-8-0 | UP 131, 132, 134, 135, 136, 141 | |
| 15 | 4-4-0 | UP 900, 903, 918, 922, 924, 927, 929, 930, 1005, 1007, 1010, 1102, 1103, 1108, 1111 | |
| 13 | 4-4-2 | UP 3321, 3322, 3323, 3324, 3325, 3326, 3327, 3328, 3329, 3330, 3331, 3332, 3333 | |
| 14 | 4-6-0 | UP 1231, 1238, 1320, 1344, 1346, 1348, 1349, 1351, 1352, 1358, 1501, 1702, 1706, 1708 |
1922
1,864 total steam on 1 January 1922
| Added (42) | 2 | 2-10-2 | UP 5400, 5401 |
| 40 | 4-8-2 | UP 7000-7039 | |
| Retired (28) | 5 | 0-6-0 | UP 4306, 4314, 4326, 4329, 4332 |
| 1 | 2-8-0 | UP 137 | |
| 17 | 4-4-0 | UP 905, 909, 916, 1003, 1009, 1011, 1012, 1052, 1053, 1054, 1055, 1056, 1057, 1058, 1059, 1060, 1061 | |
| 5 | 4-6-0 | UP 1304, 1308, 1500, 1516, 1521 |
1923
1,878 total steam on 1 January 1923
| Added (116) | 15 | 4-8-2 | UP 7850-7864 |
| 86 | 2-10-2 | UP 5040-5089, 5306-5318, 5402-5408, 5410, 5414, 5500-5514 | |
| 15 | 2-8-8-0 | UP 3634-3643, OSL 3704, 3705, OWRR&N 3803-3805 | |
| Retired (72) | 3 | 0-6-0 | UP 4318, 4322, 4327 |
| 1 | 2-8-0 | UP 138 | |
| 16 | 4-4-0 | UP 901, 902, 908, 910, 915, 920, 934, 938, 939, 944, 946, 1004, 1006, 1008, 1013, 1014 | |
| 17 | 4-4-2 | UP 3302, 3303, 3304, 3305, 3306, 3307, 3308, 3309, 3310, 3311, 3313, 3314, 3315, 3316, 3317, 3320, 3334 | |
| 35 | 4-6-0 | UP 1202, 1205, 1206, 1209, 1210, 1227, 1241, 1302, 1305, 1307, 1310, 1312, 1313, 1316, 1325, 1327, 1331, 1337, 1340, 1341, 1342, 1347, 1350, 1353, 1354, 1355, 1356, 1359, 1513, 1514, 1540, 1541, 1545, 1554, 1736 |
Eighteen UP 2200 series 2-8-2s were transferred to OSL as OSL 2500 series
Ten OSL 2500 series 2-8-2s were transferred to LA&SL as LA&SL 2700 series
Ten OSL 2500 series 2-8-2s were transferred to UP as UP 2300 series
Ten LA&SL 2700 series 2-8-2s were transferred to OSL as OSL 2500 series
Six UP 4300 series 0-6-0s were transferred to OSL as OSL 4700 series
1924
1,922 total steam on 1 January 1924
| Added (35) | 5 | 4-8-2 | UP 7865-7869 |
| 10 | 2-10-2 | UP 5515-5524 | |
| 20 | 2-8-8-0 | UP 3645-3664 | |
| Retired (31) | 2 | 0-6-0 | UP 4324, 4700 |
| 4 | 2-8-0 | UP 104, 133, 139, 416 | |
| 3 | 4-4-0 | UP 904, 921, 923 | |
| 22 | 4-6-0 | UP 1200, 1201, 1203, 1204, 1207, 1208, 1213, 1214, 1215, 1246, 1345, 1357, 1518, 1519, 1520, 1525, 1526, 1529, 1539, 1542, 1701, 1703 |
UP 2-8-0 416 rebuilt to 0-8-0 4500
1925
1,926 total steam on 1 January 1925
| Added (1) | 1 | 4-10-2 | UP 8000 (three cylinder design) |
| Retired (77) | 7 | 0-6-0 | UP 4227, 4228, 4340, 4343, 4345, 4346, 4347 |
| 1 | 2-8-0 | UP 106 | |
| 9 | 4-4-0 | UP 937, 1050, 1051, 1106, 1119, 1120, 1121, 1122, 1123 | |
| 9 | 4-4-2 | UP 3300, 3301, 3312, 3318, 3319, 3376, 3377, 3379, 3402 | |
| 46 | 4-6-0 | UP 1211, 1216, 1223, 1226, 1228, 1229, 1232, 1240, 1252, 1257, 1265, 1266, 1271, 1274, 1275, 1278, 1279, 1281, 1282, 1284, 1285, 1288, 1333, 1335, 1338, 1502, 1505, 1509, 1510, 1512, 1523, 1524, 1528, 1536, 1555, 1560, 1561, 1591, 1592, 1593, 1594, 1595, 1596, 1704, 1707, 1710 | |
| 5 | 4-8-0 | UP 1800-1804 |
1926
1,850 total steam on 1 January 1926
| Added (24) | 9 | 4-10-2 | LA&SL 8800-8808 (three-cylinder design) |
| 15 | 4-12-2 | UP 9000-9014 | |
| Retired (79) | 5 | 0-6-0 | UP 4323, 4341, 4701, 4702, 4900 |
| 9 | 2-8-0 | UP 101, 102, 108, 109, 110, 111, 112, 114, 116 | |
| 10 | 4-4-0 | UP 906, 914, 919, 931, 933, 941, 943, 1114, 1117, 1118 | |
| 1 | 4-4-2 | UP 3378 | |
| 48 | 4-6-0 | UP 1221, 1222, 1225, 1233, 1234, 1237, 1250, 1253, 1254, 1256, 1262, 1264, 1267, 1268, 1269, 1270, 1272, 1277, 1280, 1283, 1286, 1287, 1289, 1300, 1306, 1309, 1317, 1318, 1330, 1339, 1343, 1361, 1503, 1507, 1511, 1515, 1522, 1543, 1547, 1548, 1550, 1551, 1553, 1557, 1559, 1570, 1712, 1725 | |
| 1 | 4-6-2 | UP 3164 | |
| 5 | 4-8-0 | UP 1805, 1806, 1807, 1851, 1854 |
1927
1,795 total steam on 1 January 1927
(No purchases)
| Retired (39) | 15 | 0-6-0 | UP 4339, 4342, 4363, 4364, 4370, 4371, 4372, 4373, 4381, 4385, 4390, 4395, 4398, 4726, 4901 |
| 11 | 2-8-0 | UP 115, 130, 143, 711, 712, 713, 714, 715, 716, 717, 4746 | |
| 8 | 4-6-0 | UP 1244, 1365, 1517, 1527, 1531, 1535, 1709, 1732 | |
| 5 | 4-6-2 | UP 2801, 2814, 2822, 2845, 2848 |
1928
1,756 total steam on 1 January 1928
| Added (23) | 23 | 4-12-2 | UP 9015-9029 (15 locomotives), OWRR&N 9700-9707 (8 locomotives) |
| Retired (99) | 17 | 0-6-0 | UP 4338, 4354, 4362, 4376, 4379, 4384, 4387, 4389, 4391, 4393, 4399, 4706, 4718, 4719, 4722, 4724, 4727 |
| 12 | 2-8-0 | UP 151, 156, 157, 4747, 6009, 6016, 6042, 6060, 6064, 6073, 6074, 6084 | |
| 6 | 2-8-8-2 | OSL 3700, 3701, 3702, OWRR&N 3800, 3801, 3802 | |
| 13 | 4-4-2 | UP 3403, 3404, 3405, 3406, 3407, 3408, 3410, 3411, 3500, 3506, 3507, 3508, 3509 | |
| 36 | 4-6-0 | UP 1230, 1314, 1319, 1321, 1324, 1328, 1329, 1332, 1336, 1360, 1504, 1506, 1508, 1532, 1533, 1534, 1537, 1538, 1544, 1546, 1549, 1552, 1562, 1563, 1564, 1565, 1566, 1567, 1568, 1569, 1571, 1713, 1714, 1727, 1728, 1729 | |
| 10 | 4-6-2 | UP 2806, 2810, 2817, 2825, 2849, 3154, 3156, 3159, 3162, 3171 | |
| 5 | 4-8-0 | UP 1850, 1852, 1853, 1855, 1856 |
Five OWR&N 5400 series 2-10-2s sent to OSL as OSL 5300 series
Five UP 5000 series 2-10-2s sent to LA&SL as LA&SL 5500 series
1929
1,680 total steam on 1 January 1929
| Added (25) | 25 | 4-12-2 | UP 9030-9054 |
| Retired (51) | 21 | 0-6-0 | UP 4231, 4353, 4358, 4359, 4368, 4380, 4388, 4394, 4400, 4705, 4709, 4714, 4720, 4730, 4732, 4758, 4759, 4760, 4761, 4762, 4763 |
| 14 | 2-8-0 | UP 409, 424, 484, 701, 6017, 6021, 6026, 6037, 6047, 6048, 6052, 6055, 6063, 6065 | |
| 2 | 4-4-0 | UP 1115, 1116 | |
| 3 | 4-4-2 | UP 3409, 3512, 3514 | |
| 5 | 4-6-0 | UP 1236, 1247, 1315, 1323, 1719 | |
| 6 | 4-6-2 | UP 2804, 2805, 2811, 2840, 3174, 3175 |
1930
1,690 total steam on 1 January 1930
| Added (25) | 25 | 4-12-2 | UP 9078-9087 (10 locomotives), OSL 9500-9514 (15 locomotives) |
| Retired (61) | 23 | 0-6-0 | UP 4232, 4360, 4361, 4382, 4383, 4392, 4429, 4704, 4708, 4710, 4711, 4712, 4713, 4715, 4716, 4717, 4723, 4725, 4728, 4729, 4733, 4734, 4932 |
| 25 | 2-8-0 | UP 100, 103, 153, 270, 297, 331, 444, 450, 488, 515, 521, 522, 550, 551, 552, 553, 554, 734, 754, 4745, 6032, 6034, 6044, 6071, 6083 | |
| 2 | 4-4-2 | UP 3400, 3401 | |
| 6 | 4-6-0 | UP 1255, 1276, 1363, 1364, 1369, 1558 | |
| 5 | 4-6-2 | UP 2808, 2836, 2837, 2839, 3155 |
1931
1,654 total steam on 1 January 1931
(No purchases)
| Retired (15) | 2 | 0-6-0 | UP 4352, 4927 |
| 6 | 2-8-0 | UP 118, 510, 519, 703, 708, 729 | |
| 7 | 4-6-0 | UP 1368, 1717, 1720, 1722, 1723, 1724, 1726 |
(Acquired electric locomotive E-100 from Glendale & Montrose)
(Acquired 12 ton Davenport for tie plant)
1932
1,639 total steam on 1 January 1932
(No purchases)
| Retired (9) | 6 | 2-8-0 | UP 723, 6011, 6036, 6038, 6058, 6062 |
| 1 | 2-8-2 | UP 2701 | |
| 2 | 4-6-0 | UP 1334, 1721 |
1933
1,630 total steam on 1 January 1933
(No purchases)
| Retired (123) | 13 | 0-6-0 | UP 4229, 4344, 4365, 4401, 4402, 4404, 4409, 4721, 4737, 4738, 4739, 4905, 4910 |
| 59 | 2-8-0 | UP 152, 205, 210, 212, 215, 246, 259, 261, 263, 278, 280, 287, 293, 294, 314, 323, 354, 406, 454, 461, 466, 471, 482, 496, 511, 514, 516, 517, 520, 564, 571, 572, 574, 575, 578, 586, 589, 597, 601, 606, 609, 615, 704, 709, 720, 722, 724, 725, 726, 727, 6000, 6004, 6025, 6027, 6046, 6068, 6078, 6082, 6086 | |
| 5 | 4-4-0 | UP 932, 935, 940, 942, 945 | |
| 8 | 4-4-2 | UP 3501, 3502, 3503, 3504, 3505, 3510, 3511, 3513 | |
| 16 | 4-6-0 | UP 1245, 1259, 1263, 1303, 1311, 1326, 1362, 1367, 1572, 1574, 1576, 1581, 1582, 1711, 1718, 1746 | |
| 22 | 4-6-2 | UP 2807, 2813, 2816, 2821, 2831, 2833, 2834, 2838, 2841, 2843, 2847, 3101, 3102, 3103, 3112, 3161, 3165, 3169, 3172, 3173, 3207, 3211 | |
(Note: UP's diesel era began with the delivery of the M-10000, a distillate powered articulated Streamliner train, and M-10001, a diesel powered articulated Streamliner train, in May and June 1934.)
Next - Classic Era (1934-1982)
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