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Union Pacific Railroad

Roster of Diesel and Turbine Locomotives, 1934-2009

This page was last updated on March 25, 2013.

(Return to UP Diesel Roster Index Page)

Roster Listing

GE C44AC (AC4400CW) -- 273 units
4400 horsepower; C-C trucks; 412,000 pounds operating weight

Road
Number
Previous
Number
Builder
Number
Builder
Date
Date To
6148 Series
Notes
UP 6148 SP 105 48478 Apr 1995 23 Sep 2005  
UP 6149 SP 100 48473 Apr 1995 3 Sep 2005  
UP 6150 SP 102 48475 Apr 1995 13 Jul 2004  
UP 6151 SP 103 48476 Apr 1995 14 Dec 2004  
UP 6152 SP 104 48477 Apr 1995 8 Feb 2004  
UP 6153 SP 110 48483 Apr 1995 17 Sep 2005  
UP 6154 SP 112 48489 Apr 1995 29 Jul 2005  
  SP 107 48480 Apr 1995    
UP 6155 SP 114 48491 Apr 1995 17 Jan 2007  
UP 6156 SP 108 48481 Apr 1995 30 Jul 2004  
UP 6157 SP 109 48482 Apr 1995 19 May 2004  
UP 6158 SP 176 48555 May 1995 17 Mar 2004  
UP 6159 SP 117 48494 Apr 1995 23 Feb 2007  
UP 6160 SP 167 48546 May 1995 3 Aug 2007  
UP 6161 SP 154 48533 May 1995 5 Apr 2007  
UP 6162 SP 125 48504 Apr 1995 28 Sep 2005  
UP 6163 SP 101 48474 Apr 1995 4 May 2007  
UP 6164 SP 149 48528 May 1995 12 Jan 2006  
UP 6166 SP 115 48492 Apr 1995 4 Sep 2003  
UP 6167 SP 121 48500 Apr 1995 4 May 2004  
UP 6168 SP 139 48518 Apr 1995 18 Apr 2007  
UP 6169 SP 166 48545 May 1995 15 Sep 2006  
UP 6170 SP 353 48769 Oct 1995 30 Jan 2004  
UP 6171 SP 131 48510 Apr 1995 4 Jul 2005  
UP 6172 SP 124 48503 Apr 1995 17 Oct 2004  
UP 6173 SP 128 48507 Apr 1995 19 Nov 2001  
UP 6174 SP 118 48495 Apr 1995 9 Mar 2006  
UP 6175 SP 127 48506 Apr 1995 25 Mar 2004  
UP 6176 SP 173 48552 May 1995 2 Sep 2006  
UP 6177 SP 126 48505 Apr 1995 18 Apr 2004  
UP 6178 SP 111 48484 Apr 1995 8 Jun 2005  
UP 6179 SP 123 48502 Apr 1995 15 Jun 2005  
UP 6180 SP 132 48511 Apr 1995 6 Jan 2004  
UP 6181 SP 155 48534 May 1995 6 Jan 2006  
UP 6182 SP 134 48513 May 1995 14 May 2005  
UP 6183 SP 135 48514 May 1995 2 Apr 2004  
UP 6184 SP 136 48515 Apr 1995 22 Jun 2004  
UP 6185 SP 137 48516 Apr 1995 12 Sep 2003  
UP 6186 SP 140 48519 Apr 1995 24 Jan 2008  
UP 6187 SP 122 48501 Apr 1995 11 Aug 2005  
UP 6188 SP 129 48508 Apr 1995 7 Sep 2005  
UP 6189 SP 146 48525 Apr 1995 1 Feb 2005  
UP 6190 SP 142 48521 Apr 1995 11 Aug 2004  
UP 6191 SP 143 48522 Apr 1995 4 Nov 2003  
UP 6192 SP 151 48530 May 1995 25 Sep 2005  
  SP 144 48523 Apr 1995    
UP 6193 SP 138 48517 Apr 1995 13 Aug 2004  
UP 6194 SP 148 48527 Apr 1995 25 Dec 2003  
UP 6195 SP 147 48526 Apr 1995 7 Oct 2005  
UP 6196 SP 133 48512 May 1995 11 Oct 2005  
UP 6197 SP 373 48789 Oct 1995 1 Feb 2008  
UP 6198 SP 141 48520 Apr 1995 21 Feb 2006  
UP 6199 SP 152 48531 May 1995 15 Jun 2001  
UP 6200 SP 156 48535 May 1995 24 May 2002  
UP 6201 SP 153 48532 May 1995 29 Aug 2005  
UP 6202 SP 130 48509 Apr 1995 2 Mar 2005  
UP 6203 SP 188 48567 May 1995 24 Apr 2008  
UP 6204 SP 157 48536 May 1995 17 Jul 2003  
UP 6205 SP 158 48537 May 1995 15 Apr 2005  
UP 6206 SP 159 48538 May 1995 24 Jan 2001  
UP 6207 SP 183 48562 May 1995 12 Dec 2006  
UP 6208 SP 194 48573 May 1995 19 Oct 2007  
UP 6209 SP 163 48542 May 1995 23 Mar 2007  
UP 6210 SP 116 48493 Apr 1995 11 Nov 2005  
UP 6211 SP 165 48544 May 1995 13 Aug 2004  
UP 6212 SP 162 48541 May 1995 27 Aug 2003  
UP 6213 SP 168 48547 May 1995 15 Apr 2005  
UP 6214 SP 160 48539 May 1995 8 Aug 2005  
UP 6215 SP 169 48548 May 1995 18 Feb 2005  
UP 6216 SP 303 48719 Jul 1995 26 Oct 2007  
UP 6217 SP 170 48549 May 1995 12 Mar 2005  
UP 6218 SP 171 48550 Jun 1995 19 Jun 2004  
UP 6219 SP 172 48551 May 1995 18 Jun 2003  
UP 6220 SP 113 48490 Apr 1995 9 Apr 2006  
UP 6221 SP 174 48553 May 1995 4 Sep 2005  
UP 6222 SP 175 48554 May 1995 11 Oct 2004  
UP 6223 SP 119 48496 Apr 1995 5 Jun 2005  
  SP 177 48556 May 1995    
UP 6224 SP 197 48576 May 1995 29 Nov 2005  
UP 6225 SP 178 48557 May 1995 15 Oct 2004  
UP 6226 SP 185 48564 May 1995 12 Jun 2004  
UP 6227 SP 182 48561 May 1995 6 Jan 2005  
UP 6228 SP 161 48540 May 1995 7 May 2008  
UP 6229 SP 181 48560 May 1995 20 Feb 2004  
UP 6230 SP 150 48529 May 1995 24 Jun 2004  
UP 6231 SP 180 48559 May 1995 13 Oct 2005  
UP 6232 SP 184 48563 May 1995 23 Jan 2004  
UP 6233 SP 189 48568 May 1995 27 Mar 2004  
UP 6234 SP 179 48558 May 1995 22 Feb 2007  
  SP 187 48566 May 1995    
UP 6235 SP 196 48575 May 1995 16 Mar 2006  
UP 6236 SP 257 48618 Jun 1995 30 May 2008  
UP 6237 SP 191 48570 May 1995 12 Mar 2003  
  SP 192 48571 May 1995    
UP 6238 SP 186 48565 May 1995 12 Jan 2007  
UP 6239 SP 190 48569 May 1995 13 Sep 2003  
UP 6240 SP 203 48664 Jul 1995 23 Aug 2007  
UP 6241 SP 193 48572 May 1995 11 May 2004  
UP 6242 SP 164 48543 May 1995 31 Mar 2006  
UP 6243 SP 195 48574 May 1995 22 Jun 2004  
UP 6244 SP 212 48673 Jul 1995 12 May 2004  
UP 6245 SP 198 48577 May 1995 25 May 2001  
UP 6246 SP 106 48479 Apr 1995 19 Jan 2006  
UP 6247 UP 6895 48640 Jun 1995 13 Jun 2008 1
  SP 199 48578 May 1995    
UP 6248 SP 355 48771 Oct 1995 16 Jul 2008  
UP 6249 SP 202 48663 Jul 1995 16 Sep 2002  
UP 6250 SP 239 48600 Jun 1995 20 Aug 2008  
UP 6251 SP 211 48672 Jul 1995 15 Feb 2003  
UP 6253 SP 258 48619 Jun 1995 11 Jan 2006  
UP 6255 SP 209 48670 Jul 1995 16 Sep 2003  
UP 6256 SP 206 48667 Jul 1995 14 Mar 2007  
UP 6257 SP 205 48666 Jul 1995 12 Aug 2005  
UP 6258 SP 251 48612 Jun 1995 11 Mar 2005  
UP 6259 SP 214 48675 Jul 1995 7 Nov 2003  
UP 6260 SP 210 48671 Jul 1995 4 Oct 2003  
UP 6261 SP 204 48665 Jul 1995 28 Feb 2007  
UP 6262 SP 220 48581 May 1995 12 May 2004  
UP 6263 SP 267 48628 Jun 1995 12 Jan 2005  
UP 6264 SP 208 48669 Jul 1995 12 Apr 2007  
UP 6265 SP 213 48674 Jul 1995 12 Dec 2002  
UP 6266 SP 216 48486 Apr 1995 30 Jul 2003  
UP 6267 SP 217 48487 Apr 1995 15 Aug 2003  
UP 6268 SP 227 48588 Jun 1995 16 Oct 2003  
UP 6269 SP 201 48662 Jul 1995 22 Oct 2003  
UP 6270 SP 285 48646 Jun 1995 27 Jun 2005  
UP 6271 SP 225 48586 Jun 1995 6 Sep 2003  
UP 6272 SP 301 48497 May 1995 24 Jan 2005  
UP 6273 SP 226 48587 Jun 1995 9 Jun 2004  
UP 6274 SP 228 48589 Jun 1995 24 May 2003  
UP 6275 SP 230 48591 Jun 1995 16 Apr 2004  
UP 6276 SP 235 48596 Jun 1995 26 Mar 2003  
UP 6277 SP 223 48584 May 1995 24 Oct 2001  
UP 6279 SP 248 48609 Jun 1995 30 Jun 2006  
UP 6280 SP 231 48592 Jun 1995 12 Feb 2002  
UP 6281 SP 215 48485 Apr 1995 17 Mar 2005  
UP 6282 SP 229 48590 Jun 1995 16 Mar 2006  
UP 6284 SP 237 48598 Jun 1995 17 Dec 2002  
UP 6285 SP 242 48603 Jun 1995 13 Jan 2001  
UP 6286 SP 236 48597 Jun 1995 24 Apr 2003  
UP 6287 SP 233 48594 May 1995 31 Oct 2003  
UP 6288 SP 238 48599 Jun 1995 13 Mar 2004  
UP 6289 SP 243 48604 Jun 1995 20 Nov 2003  
UP 6290 SP 244 48605 Jun 1995 15 Apr 2004  
UP 6291 SP 245 48606 Jun 1995 13 Aug 2003  
UP 6292 SP 246 48607 Jun 1995 7 Jun 2004  
UP 6293 SP 247 48608 Jun 1995 10 Feb 2003  
UP 6294 SP 241 48602 Jun 1995 5 Jun 2004  
UP 6295 SP 218 48488 Apr 1995 10 Jun 2004  
UP 6296 SP 250 48611 Jun 1995 7 Feb 2003  
UP 6298 SP 252 48613 Jun 1995 1 Jul 2003  
UP 6299 SP 253 48614 Jun 1995 2 Feb 2004  
UP 6301 SP 255 48616 Jun 1995 25 May 2004  
UP 6302 SP 376 48792 Oct 1995 10 Nov 2003  
UP 6303 SP 222 48583 May 1995 25 Mar 2005  
UP 6304 SP 254 48615 Jun 1995 27 May 2004  
UP 6305 SP 234 48595 Jun 1995 6 Jul 2004  
UP 6306 SP 261 48622 Jun 1995 30 Mar 2004  
UP 6307 SP 262 48623 Jun 1995 9 Jul 2003  
UP 6309 SP 263 48624 Jun 1995 12 Nov 2003  
UP 6310 SP 264 48625 Jun 1995 18 May 2004  
UP 6311 SP 232 48593 Jun 1995 23 Feb 2007  
  SP 266 48627 Jun 1995    
UP 6312 SP 207 48668 Jul 1995 21 Aug 2004  
UP 6313 SP 219 48580 May 1995 10 Sep 2004  
UP 6314 SP 270 48631 Jun 1995 15 Dec 2003  
UP 6315 SP 269 48630 Jun 1995 12 Jun 2003  
UP 6316 SP 271 48632 Jun 1995 10 Feb 2001  
UP 6317 SP 274 48635 Jun 1995 27 Aug 2004  
UP 6318 SP 280 48641 Jun 1995 23 Jul 2004  
UP 6319 SP 273 48634 Jun 1995 6 Mar 2004  
UP 6320 SP 268 48629 Jun 1995 22 Apr 2005  
UP 6321 SP 277 48638 Jun 1995 21 Jun 2004  
UP 6322 SP 299 48660 Jul 1995 21 Jun 2004  
UP 6323 SP 278 48639 Jun 1995 28 May 2003  
UP 6325 SP 377 48793 Oct 1995 27 May 2005  
UP 6326 SP 332 48748 Jul 1995 1 Jun 2007  
UP 6327 SP 284 48645 Jun 1995 14 Jul 2003  
UP 6328 SP 334 48750 Jul 1995 1 Jun 2007  
UP 6329 SP 289 48650 Jul 1995 30 Oct 2004  
UP 6330 SP 288 48649 Jul 1995 3 Apr 2004  
UP 6331 SP 281 48642 Jun 1995 2 Mar 2005  
UP 6332 SP 287 48648 Jun 1995 3 Jul 2003  
UP 6333 SP 286 48647 Jun 1995 9 Jan 2003  
UP 6334 SP 293 48654 Jul 1995 6 Nov 2003  
UP 6335 SP 290 48651 Jul 1995 1 Dec 2003  
UP 6336 SP 240 48601 Jun 1995 23 Oct 2004  
UP 6337 SP 292 48653 Jul 1995 19 Sep 2003  
UP 6338 SP 272 48633 Jun 1995 25 Jun 2005  
UP 6339 SP 297 48658 Jul 1995 11 Sep 2003  
UP 6340 SP 305 48721 Jul 1995 11 Jun 2003  
UP 6343 SP 259 48620 Jun 1995 9 Feb 2007  
UP 6344 SP 298 48659 Jul 1995 18 Jan 2002  
UP 6345 SP 296 48657 Jul 1995 3 Jun 2004  
UP 6346 SP 300 48661 Jul 1995 25 Feb 2002  
UP 6347 SP 302 48498 Apr 1995 12 Sep 2003 2
UP 6348 SP 375 48791 Oct 1995 17 Aug 2005  
UP 6349 SP 306 48722 Jul 1995 22 May 2003  
UP 6350 SP 338 48754 Jul 1995 21 Mar 2007  
UP 6351 SP 359 48775 Oct 1995 8 Jan 2007  
UP 6352 SP 329 48745 Jul 1995 23 Jun 2005  
UP 6353 SP 295 48656 Jul 1995 28 Oct 2004  
UP 6354 SP 307 48723 Jul 1995 28 Jan 2003  
UP 6355 SP 308 48724 Jul 1995 31 Jan 2004  
UP 6356 SP 324 48740 Jul 1995 15 Mar 2007  
  SP 309 48725 Jul 1995    
UP 6357 SP 304 48720 Jul 1995 2 Jun 2003  
UP 6358 SP 313 48729 Jul 1995 30 May 2003  
UP 6359 SP 312 48728 Jul 1995 8 Jan 2004  
UP 6360 SP 316 48732 Jul 1995 1 Aug 2003  
UP 6361 SP 320 48736 Jul 1995 9 Jul 2003  
UP 6362 SP 310 48726 Jul 1995 3 Jun 2004  
UP 6363 SP 354 48770 Oct 1995 7 May 2006  
  SP 319 48735 Jul 1995    
UP 6365 SP 347 48763 Aug 1995 17 Aug 2007  
UP 6366 SP 314 48730 Jul 1995 25 Apr 2002  
UP 6367 SP 321 48737 Jul 1995 14 Jun 2003  
UP 6368 SP 315 48731 Jul 1995 13 Feb 2004  
UP 6369 SP 323 48739 Jul 1995 4 Jun 2003  
UP 6370 SP 318 48734 Jul 1995 21 Feb 2004  
UP 6371 SP 325 48741 Jul 1995 18 Jul 2003  
UP 6372 SP 326 48742 Jul 1995 21 Jul 2003  
UP 6373 SP 276 48637 Jun 1995 24 Jun 2004  
UP 6374 SP 328 48744 Jul 1995 9 Feb 2002  
UP 6375 SP 283 48644 Jun 1995 29 Jul 2004  
UP 6376 SP 294 48655 Jul 1995 3 Aug 2004  
UP 6377 SP 331 48747 Jul 1995 11 Feb 2003  
UP 6378 SP 311 48727 Jul 1995 6 Aug 2004  
UP 6379 SP 333 48749 Jul 1995 18 Jun 2004  
  SP 335 48751 Jul 1995    
UP 6380 SP 282 48643 Jul 1995 10 Aug 2004  
UP 6381 SP 322 48738 Jul 1995 2 Sep 2004  
UP 6382 SP 336 48752 Jul 1995 25 Nov 2003  
UP 6383 SP 337 48753 Jul 1995 21 May 2004  
UP 6384 SP 291 48652 Jul 1995 14 Oct 2004  
UP 6385 SP 339 48755 Jul 1995 24 Feb 2004  
UP 6386 SP 340 48756 Jul 1995 10 Sep 2004  
UP 6387 SP 341 48757 Jul 1995 29 Apr 2003  
UP 6388 SP 342 48758 Jul 1995 4 Apr 2003  
UP 6389 SP 364 48780 Oct 1995 24 Sep 2005  
  SP 343 48759 Jul 1995    
UP 6390 SP 260 48621 Jun 1995 14 Sep 2004  
UP 6391 SP 345 48761 Aug 1995 12 Nov 2001  
UP 6392 SP 346 48762 Aug 1995 19 Aug 2004  
UP 6393 SP 275 48636 Jun 1995 21 Sep 2004  
UP 6394 SP 348 48764 Aug 1995 25 Jun 2004  
UP 6395 SP 200 48579 May 1995 8 Nov 2004  
UP 6396 SP 350 48766 Aug 1995 3 Sep 2004  
UP 6397 SP 351 48767 Aug 1995 31 Oct 2002  
  SP 352 48768 Aug 1995    
UP 6398 SP 344 48760 Aug 1995 22 Nov 2004  
UP 6399 SP 120 48499 Apr 1995 21 Mar 2001  
UP 6400 SP 330 48746 Jul 1995 25 Jan 2005  
UP 6401 SP 265 48626 Jun 1995 24 Nov 2004  
UP 6402 SP 358 48774 Oct 1995 2 Jul 2005  
UP 6403 SP 357 48773 Oct 1995 26 Feb 2004  
UP 6404 SP 349 48765 Aug 1995 28 Jan 2005  
UP 6405 SP 317 48733 Jul 1995 3 Feb 2005  
UP 6406 SP 360 48776 Oct 1995 4 Mar 2003  
UP 6407 SP 361 48777 Oct 1995 29 Jun 2004  
UP 6408 SP 362 48778 Oct 1995 23 Nov 2004  
UP 6409 SP 363 48779 Oct 1995 12 Sep 2004  
UP 6410 SP 327 48743 Jul 1995 4 Aug 2005  
UP 6411 SP 365 48781 Oct 1995 20 May 2005  
UP 6412 SP 366 48782 Oct 1995 13 May 2003  
UP 6413 SP 367 48783 Oct 1995 29 Jun 2004  
UP 6414 SP 368 48784 Oct 1995 24 Jun 2005  
UP 6415 SP 369 48785 Oct 1995 11 Jun 2004  
UP 6416 SP 370 48786 Oct 1995 24 May 2000 3
UP 6417 SP 371 48787 Oct 1995 14 Jan 2002  
UP 6418 SP 372 48788 Oct 1995 15 Apr 2003  
UP 6419 SP 374 48790 Oct 1995 17 Aug 2004  
UP 6420 SP 378 48794 Oct 1995 16 Jul 2004  

General Notes:

a. Original total of 279 SP units, numbered SP 100-378; 277 units went to UP at merger; SP retired two units (SP 145 and 224) prior to the UP merger; SP 145 and 224 were wrecked on 21 February 1996 at Pando, Colorado, on Tennessee Pass; both units were scrapped at the wreck site; the cab from SP 145, along with a set of trucks and both fuel tanks, was salvaged and retained at the former SP Burnham Shops in Denver, Colorado; the cab from SP 145 was used in August 1997 to repair wreck-damaged C&NW 8671, which became UP 9775.
b. SP 100-271 assigned UP 6380-6549 in September 1997, three units (UP 6500, 6527, 6534) renumbered; assigned UP 6148-6317 in December 1999 (UP 6500, 6527, 6534 assigned UP 6421-6423 to clear the 6500 series numbers for use by new C44ACs in January to June 2000).
c. SP 272-378 assigned UP 6888-6994 in September 1997, one unit (UP 6895) renumbered; assigned UP 6318-6420 in December 1999 (UP 6895 assigned UP 6424).
d. These 273 units are assigned UP numbers not in SP sequence; SP 375-378 assigned UP 6268, 6295, 6302, 6325, the numbers that would have been held by the four previously renumbered units (SP 221, 249, 256, 279) assigned to the UP 6421-6424 series.
e. UP's designation for these units is C44AC; GE's designation is AC4400CW.

Notes:

1. UP 6247 was renumbered from UP 6895, which had been renumbered from SP 279 on 4 July 1998.
2. UP 6347 builder date changed from July 1995 to April 1995 based on builder plate checked by Norm Metcalf, as UP 6347.
3. UP 6416 (ex SP 370) was the first unit in this group to be renumbered, completed on 24 May 2000.
   

GE C44AC (AC4400CW) -- 4 units
4400 horsepower; C-C trucks; 415,000 pounds operating weight

Road
Number
First
Number
Second
Number
Builder
Number
Builder
Date
Date To
6380/6888
Series
Date To
6421 Series
Notes
UP 6421 SP 221 UP 6500 48582 May 1995 21 Dec 1998 22 Mar 2000  
UP 6422 SP 249 UP 6527 48610 Jun 1995 14 Sep 1999 28 Feb 2000 1
UP 6423 SP 256 UP 6534 48617 Jun 1995 18 Jun 1997 29 Feb 2000 2
UP 6424 SP 356   48772 Oct 1995   28 Sep 2005  
  SP 279 UP 6895 48640 Jun 1995 4 Jul 1998    

General Notes:

a. Of the original total of 277 former SP C44ACs, only these four units were renumbered to their previously assigned UP number series, UP 6380-6549 (for SP 100-271) and 6888-6994 (for SP 272-378); the other 273 units were renumbered direct to the UP 6148-6420 group.
b. UP's designation for these units is C44AC; GE's designation is AC4400CW.
c. Assigned as part of the UP 6380-6549 series and the 6888-6994 series in September 1997, four units (UP 6500, 6527, 6534, 6895) renumbered; assigned UP 6421-6424 in December 1999.

Notes:

1. UP 6422, as SP 249, was wrecked on 12 September 1998 at Shawnee Junction, Wyoming; moved to Coast Engine & Equipment Co., Tacoma, Washington, for wreck damage repairs in February 1999; repairs completed, as UP 6527, and returned to service on 14 September 1999. While being repainted, an incorrect builder's number was applied to the unit; it now has builder's number 48810 instead of the correct 48610.
2. UP 6423 (ex UP 6534, ex SP 256) was the first in this group to be repainted to Union Pacific, completed on 18 June 1997.
   

GE C44AC (AC4400CW) -- 3 units
4400 horsepower; C-C trucks; 412,000 pounds operating weight

Road
Number
First
Number
Builder
Date
Builder
Number
Date To
6380 Series
6421 Series
Number
Date To
6421 Series
Notes
UP 6500 SP 221 May 1995 48582 21 Dec 1998 UP 6421 22 Mar 2000  
UP 6527 SP 249 Jun 1995 48610 14 Sep 1999 UP 6422 28 Feb 2000 1
UP 6534 SP 256 Jun 1995 48617 18 Jun 1997 UP 6423 29 Feb 2000 2

General Notes:

a. UP's designation for these units is C44AC; GE's designation is AC4400CW.
b. SP 100-271 assigned UP 6380-6549 in September 1997, three units (6500, 6527, 6534) renumbered; assigned UP 6148-6317 in December 1999; the above three renumbered units were assigned UP 6421-6423 in December 1999 to clear the 6500 series for use by new C44ACs in January to June 2000.

Notes:

1. UP 6527, as SP 249, was wrecked on 12 September 1998 at Shawnee Junction, Wyoming; moved to Coast Engine & Equipment Co., Tacoma, Washington, for wreck damage repairs in February 1999; repairs completed and returned to service on 14 September 1999 as UP 6527. While being repainted, an incorrect builder's number was applied to the unit; it now has builder's number 48810 instead of the correct 48610.
2. UP 6534 (ex SP 256) was the first in this group to be repainted to Union Pacific, completed on 18 June 1997.
   

GE C44AC (AC4400CW) -- 120 units
4400 horsepower; C-C trucks; 415,000 pounds operating weight

Road
Number
Builder
Number
Builder
Date
Date
Delivered
Notes
UP 6430 52582 Nov 2000 28 Nov 2000  
UP 6431 52581   28 Nov 2000  
UP 6432 52580   27 Nov 2000  
UP 6433 52579 Oct 2000 16 Nov 2000  
UP 6434 52578   16 Nov 2000  
UP 6435 52577   7 Nov 2000  
UP 6436 52576 Oct 2000 7 Nov 2000  
UP 6437 52575   4 Nov 2000  
UP 6438 52574   4 Nov 2000  
UP 6439 52573   31 Oct 2000  
UP 6440 52572   31 Oct 2000  
UP 6441 52571   31 Oct 2000  
UP 6442 52570 Oct 2000 29 Oct 2000  
UP 6443 52569   29 Oct 2000  
UP 6444 52568   22 Oct 2000  
UP 6445 52567   22 Oct 2000  
UP 6446 52566 Oct 2000 17 Oct 2000  
UP 6447 52565   17 Oct 2000  
UP 6448 52564   4 Oct 2000  
UP 6449 52563 Sep 2000 4 Oct 2000  
UP 6450 52562   4 Oct 2000  
UP 6451 52561   4 Oct 2000  
UP 6452 52560   4 Oct 2000  
UP 6453 52559 Sep 2000 4 Oct 2000  
UP 6454 52558   1 Oct 2000  
UP 6455 52557 Sep 2000 2 Oct 2000  
UP 6456 52556   26 Sep 2000  
UP 6457 52555   26 Sep 2000  
UP 6458 52554   29 Sep 2000  
UP 6459 52553   24 Sep 2000  
UP 6460 52552   24 Sep 2000  
UP 6461 52551 Sep 2006 26 Sep 2000  
UP 6462 52550 Jul 2000 2 Oct 2000  
UP 6463 52549 Jun 2000 22 Jul 2000  
UP 6464 52548   8 Jul 2000  
UP 6465 52547   27 Jul 2000  
UP 6466 52546 Jun 2000 8 Jul 2000  
UP 6467 52545   13 Jul 2000  
UP 6468 52544 Jun 2000 1 Jul 2000  
UP 6469 52543   8 Jul 2000  
UP 6470 52542   8 Jul 2000  
UP 6471 52541 Jun 2000 4 Jul 2000  
UP 6472 52540   4 Jul 2000  
UP 6473 52539   8 Jul 2000  
UP 6474 52538   8 Jul 2000  
UP 6475 52537   29 Jun 2000  
UP 6476 52536   2 Jul 2000  
UP 6477 52535   30 Jun 2000  
UP 6478 52534 Jun 2000 30 Jun 2000  
UP 6479 52533   29 Jun 2000  
UP 6480 52532   25 Jun 2000  
UP 6481 52531 Jun 2000 2 Jul 2000  
UP 6482 52530   25 Jun 2000  
UP 6483 52529   25 Jun 2000  
UP 6484 52528 Jun 2000 25 Jun 2000  
UP 6485 52527 Jun 2000 24 Jun 2000  
UP 6486 52526   25 Jun 2000  
UP 6487 52525   24 Jun 2000  
UP 6488 52524 Jun 2000 25 Jun 2000  
UP 6489 52523 Jun 2000 24 Jun 2000  
UP 6490 52522 Jun 2000 24 Jun 2000  
UP 6491 52521 Jun 2000 23 Jun 2000  
UP 6492 52520   23 Jun 2000  
UP 6493 52519 Jun 2000 24 Jun 2000  
UP 6494 52518   24 Jun 2000  
UP 6495 52517   24 Jun 2000  
UP 6496 52516 Jun 2000 24 Jun 2000  
UP 6497 52515   25 Jun 2000  
UP 6498 52514   24 Jun 2000  
UP 6499 52513 Jun 2000 24 Jun 2000  
UP 6500 52512   18 Jun 2000  
UP 6501 52511 Jun 2000 21 Jun 2000  
UP 6502 52510 Jun 2000 20 Jun 2000  
UP 6503 52509 Jun 2000 18 Jun 2000  
UP 6504 52508   4 Jun 2000  
UP 6505 52507 May 2000 3 Jun 2000  
UP 6506 52506   4 Jun 2000  
UP 6507 52505   3 Jun 2000  
UP 6508 52504   29 May 2000  
UP 6509 52503   29 May 2000  
UP 6510 52502 May 2000 29 May 2000  
UP 6511 52501   24 May 2000  
UP 6512 52500 May 2000 24 May 2000  
UP 6513 52499   8 Jul 2000  
UP 6514 52498   15 May 2000  
UP 6515 52497   15 May 2000  
UP 6516 52496 Apr 2000 15 May 2000  
UP 6517 52495   15 May 2000  
UP 6518 52494 Apr 2000 8 May 2000  
UP 6519 52493   8 May 2000  
UP 6520 52492 Apr 2000 3 May 2000  
UP 6521 52491   3 May 2000  
UP 6522 52490 Apr 2000 3 May 2000  
UP 6523 52489   29 Apr 2000  
UP 6524 52488   3 May 2000  
UP 6525 52127 Feb 2000 12 May 2000  
UP 6526 52126   22 Apr 2000  
UP 6527 52125 Feb 2000 3 May 2000  
UP 6528 52124   2 May 2000  
UP 6529 52123 Feb 2000 31 Mar 2000  
UP 6530 52122 Feb 2000 31 Mar 2000  
UP 6531 52121 Feb 2000 31 Mar 2000  
UP 6532 52120 Feb 2000 2 Mar 2000  
UP 6533 52119   1 Mar 2000  
UP 6534 52118   7 Mar 2000  
UP 6535 52117   1 Mar 2000  
UP 6536 52116   1 Mar 2000  
UP 6537 52115   2 Mar 2000  
UP 6538 52114   1 Mar 2000  
UP 6539 52113 Jan 2000 6 Mar 2000  
UP 6540 52112 Jan 2000 2 Mar 2000  
UP 6541 52111 Jan 2000 8 Mar 2000  
UP 6542 52110   6 Mar 2000  
UP 6543 52109   6 Mar 2000  
UP 6544 52108   1 Mar 2000  
UP 6545 52107 Jan 2000 7 Mar 2000  
UP 6546 52106 Jan 2000 1 Mar 2000 1
UP 6547 52105 Jan 2000 6 Mar 2000  
UP 6548 52104   2 Mar 2000  
UP 6549 52103   7 Mar 2000  

General Note:

a. These units were delivered in builder's number sequence, but in reverse road number sequence, beginning with the highest-numbered unit, UP 6549, to allow UP time to renumber the two former SP C44ACs that occupied the same number series, UP 6527 (ex SP 249), renumbered to UP 6422 on 28 February 2000, and UP 6534 (ex SP 256), renumbered to UP 6423 on 29 February 2000.

Notes:

1. UP 6546 apparently has two frame batch numbers, 1920-04 and 1911-169. (checked by Norm Metcalf)

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