General Notes:
1. Three GG20B units built in June-July 2005 by Motive Power Inc. (Wabtec) in Boise, ID. First unit (6000) completed 6-13-2005 and shipped to Fort Lewis, WA (near Tacoma). From RailPower website. (http://www.railpower.com/usarmy.html)
2. Initial deployment from Extra 2200 South and other sources: USAX 6000 to Fort Lewis, WA; USAX 6001 to the Sierra Army Depot in Hurlong, CA; USAX 6002 to the USMC Logistics Center in Yermo, CA. From Extra 2000 South #128, page 21. 6001 later moved to Fort Sill, OK.

Notes:
A. Frame number checked by webmaster during visit in early 2006.
B. Actual unit number confirmed by frame number verification by Bob Lehmuth Dec. 2006 with much thanks. This confirmed that the 6002 was built using TM 855 as a core, despite earlier reports that that unit had been used as the core for 6001.
C. All three units have now (Autumn 2009) been moved to Hill Air Force Base near Ogden, UT for work. An Army source expected them to be converted to gensets, but nothing firm has been released by the Army yet. Units previously had been moved to Hill for warranty replacement for the batteries in early 2006. Update: According to sources at the DGRC, these units will be parted out and scrapped unless another solution is found.

History:

Notes:
A. USAX 6000 history from Extra 2200 South, #127. Additional build info filled in from the Illinois Central All Time Dieslel Rosters (http://www.illinoiscentral.net/rosters/alltimeroster.html). History info filled in by cross-referencing the frame number using the data on the Unofficial EMD Home Page (http://www.trainweb.org/emdloco/).
B. USAX 6001 history from Extra 2200 South, #127. Additional build info filled in from the Illinois Central All Time Dieslel Rosters (http://www.illinoiscentral.net/rosters/alltimeroster.html). Actual unit verified by process of elimination because of frame number verifications of 6000 and 6002.
C. Unit history from Extra 2200 South, #127. Additional build info filled in from the Kansas City Southern Historical Society rosters used with much appreciation.

General Notes:
1. Can be called a Phase III body style, with larger vents over the batteries. There are some minor component differences over earlier versions as well. 3rd Generation units according to Railpower. Both units upgraded to 4th gen. specs after recall. 6004 was the 1st RP unit to be upgraded, prior to delivery.

Notes:
A. 6003 shipped sometime in July, destination unkown. Unit is on UP trace system, but not showing up. From info collected at source, and UP trace. Reportedly headed to Fort McCoy near Sparta, WI. From Robert Dennis. Still at Ft. McCoy per sightings in Sept. 2009. Reported moved to Hill AFB by contact at the DGRC in December 2009.
B. USAX 6004 was originally built as CP 1702, among the first of a 35-unit order by Canadian Pacific. CP 1700-1706 were to be constructed in 2005 for testing. From CP Railway press release 3-14-2005. Order cancelled and CP 1700-1704 were returned to Railpower and resold. CP 1705 was built but not yet delivered. From Railpower press release dated Dec. 5, 2006. Units dispersed as follows: CP 1700 to Amtrak 599, RPRX 2406; CP 1701 to RPRX 1701; CP 1702 to USAX 6004; CP 1703 to BP Amoco 1703; CP 1704 to BNSF 1205; CP 1705 to RPRX 1705, NITX 1705.

History:

Notes:
A. Original unit number WC 2057 from Extra 2200 South #129, page 21. Extra information from the Unofficial EMD Homepage (http://www.trainweb.org/emdloco/) Original build date unconfirmed, but locomotives on both sides of this unit in the order were built in March, 1964. Core number of USAX 1876 originally reported, but this proved to be incorrect. USAX 1876 was at CAD at the time of 6003's conversion.
B. Donor unit history from the CP Locomotive Roster and Photo Archives.

General Notes:
1. According to a recent press release from NRE, the US Army has ordered a pair of 3GS21Bs for use at Fort Hood, TX. (The press release is not archived online.) they didn't say anything about NRE gensets. Nevertheless, news that they were ordering two 3GS21B's and one 3GS21C was reported in the Trains Magazine special "Locomotive 2007" edition.
2. 6500-6501, Build location and builder's plate data confirmed by Mark Mautner.
3. Later unit orders (6502-6503 and 6504-6506) built to same spec as 6500-6501 despite new variant of hood design, etc. being in regular production.
4. 6502-6503, plate check performed by JMoore. 6504, plate info relayed via KenZ 2nd hand. 6506, plate check performed by Colorado Zephyr. Info in all three cases taken from emissions decal on units because they did not have builder's plates installed.
5. 6506 Plate Info provided by Sean Graham-White.

Notes:
A. Because the Army wanted their new units to be delivered quickly, two locomotives from the BNSF order were diverted to fill this order. As such, the 6500 and 6501 are built to BNSF specs. From various discussions and on-site confirmation.
B. Deployment information from on-site verification by webmaster.
C. Deployment information from a press release by NRE and from on-site reports by COZephyr, Nathan Zachmann, and others.

Photos: (Click to enlarge)