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NORFOLK SOUTHERN
DIESEL LOCOMOTIVE ROSTER

EMD/NS SD70ACU Nos. 7229-7339

45 Units Active (17 of those are currently stored)

 

 

This roster compiled and maintained by Chris R. Toth. 
Roster last updated on June 25, 2025.

 


Active Roster

 
Road No. Rebuilt From Rebuild Date Rebuilt By Original Build Date Order
No.		 Builder
No.		 Notes
7229 NS SD90MAC 7229/UP 3481/UP 8015 08-2016 NS 01-1996 936449 936449-16 See numbering note at bottom of roster.
7230 NS SD90MAC 7230/UP 3470/UP 8000 01-2018 NS 10-1995 936449 936449-1  
7232 NS SD90MAC 7232/UP 3472/UP 8002 03-2017 NS 01-1996 936449 936449-3 Unit currently stored, but still on the active roster.
7235 NS SD90MAC 7235/UP 3490/UP 8005 06-2016 NS 01-1996 936449 936449-6  
7236 NS SD90MAC 7236/UP 3476/UP 8006 11-2016 NS 01-1996 936449 936449-7  
7237 NS SD90MAC 7237/UP 3477/UP 8007 05-2017 NS 01-1996 936449 936449-8  
7240 NS SD90MAC 7240/UP 3480/UP 8010 11-2017 NS 01-1996 936449 936449-11  
7242 NS SD90MAC 7242/UP 3485/UP 8012 11-2016 NS 01-1996 936449 936449-13  
7243 NS SD90MAC 7243/UP 3483/UP 8013 09-2016 NS 01-1996 936449 936449-14  
7245 NS SD90MAC 7245/UP 3488/UP 8016 06-2016 NS 02-1996 936449 936449-17  
7246 NS SD90MAC 7246/UP 3473/UP 8017 12-2016 NS 02-1996 936449 936449-18  
7247 NS SD90MAC 7247/UP 3489/UP 8018 04-2017 NS 02-1996 936449 936449-19  
7249 NS SD90MAC 7249/UP 3475/UP 8020 12-2016 NS 02-1996 936449 936449-21 Unit currently stored, but still on the active roster.
7252 NS SD90MAC 7252/UP 3491/UP 8023 07-2016 NS 02-1996 936449 936449-24  
7253 NS SD90MAC 7253/UP 3492/UP 8024 10-2016 NS 03-1996 936449 936449-25  
7254 NS SD90MAC 7254/UP 3518/UP 8035 12-2016 Progress Rail 06-1996 956613 956613-11  
7258 NS SD90MAC 7258/UP 3501/UP 8029 04-2016 NS 06-1996 956613 956613-5  
7263 NS SD90MAC 7263/UP 3517/UP 8034 03-2016 NS 06-1996 956613 956613-10 Unit currently stored, but still on the active roster.
7265 NS SD90MAC 7265/UP 3523/UP 8037 05-2016 NS 08-1996 956613 956613-13  
7266 NS SD90MAC 7266/UP 3525/UP 8038 07-2017 NS 08-1996 956613 956613-14 Unit currently stored, but still on the active roster.
7269 NS SD90MAC 7269/UP 3528/UP 8041 01-2018 NS 08-1996 956613 956613-17 Unit currently stored, but still on the active roster.
7273 NS SD90MAC 7273/UP 3536/UP 8045 07-2016 NS 08-1996 956613 956613-21  
7278 NS SD90MAC 7278/UP 3542/UP 8050 03-2017 Progress Rail 08-1996 956613 956613-26  
7281 NS SD90MAC 7281/UP 3497/UP 8053 07-2017 NS 08-1996 956613 956613-29 Unit currently stored, but still on the active roster.
7284 NS SD90MAC 7284/UP 3507/UP 8056 08-2017 NS 08-1996 956613 956613-32 Unit currently stored, but still on the active roster.
7285 NS SD90MAC 7285/UP 3508/UP 8057 12-2016 Progress Rail 08-1996 956613 956613-33  
7291 NS SD90MAC 7291/UP 3516/UP 8063 08-2017 NS 08-1996 956613 956613-39 Unit currently stored, but still on the active roster.
7295 NS SD90MAC 7295/UP 3524/UP 8067 12-2017 NS 09-1996 956613 956613-41  
7297 NS SD90MAC 7297/UP 3531/UP 8069 04-2016 NS 09-1996 956613 956613-45 Unit currently stored, but still on the active roster.
7300 NS SD90MAC 7300/UP 3538/UP 8072 07-2017 NS 09-1996 956613 956613-48 Unit currently stored, but still on the active roster.
7302 NS SD90MAC 7302/UP 3541/UP 8074 04-2017 NS 09-1996 956613 956613-50 Unit currently stored, but still on the active roster.
7303 NS SD90MAC 7303/UP 3549/UP 8078 04-2017 NS 01-1997 966714 966714-4  
7304 NS SD90MAC 7304/UP 3550/UP 8079 01-2017 NS 02-1997 966714 966714-5 Unit currently stored, but still on the active roster.
7309 NS SD90MAC 7309/UP 3620/UP 8142 08-2016 NS 04-1997 966714 966714-68  
7312 NS SD90MAC 7312/UP 3579/UP 8161 01-2017 NS 06-1997 966714 966714-87  
7322 NS SD90MAC 7322/UP 3695/UP 8218 03-2017 NS 02-1998 976800 976800-40 Unit currently stored, but still on the active roster.
7329 NS SD90MAC 7329/CEFX 104 10-2018 NS 11-1999 986927 986927-5 Unit currently stored, but still on the active roster.
7332 NS SD90MAC 7332/CEFX 120 04-2019 NS 12-1999 986927 986927-21  
7333 NS SD90MAC 7333/CEFX 121 09-2018 NS 12-1999 986927 986927-22  
7334 INRD SD90MAC 9002/CEFX 124 03-2019 NS 12-1999 986927 986927-25  
7335 NS SD90MAC 7335/CEFX 125 12-2018 NS 12-1999 986927 986927-26  
7336 NS SD90MAC 7336/INRD 9003/CEFX 126 12-2018 NS 12-1999 986927 986927-27 Unit currently stored, but still on the active roster.
7337 NS SD90MAC 7337/INRD 9008/CEFX 135 09-2018 NS 01-2000 986927 986927-36 Unit currently stored, but still on the active roster.
7338 NS SD90MAC 7338/INRD 9006/CEFX 138 04-2019 NS 02-2000 986927 986927-39 Unit currently stored, but still on the active roster.
7339 NS SD70ACU/SD90MAC 7314/UP 3631/UP 8176 09-2016 NS 07-1997 966714 966714-102 Unit renumbered from NS 7314 10/2018.


General Info

NS Model Designation = SD70ACU
Horsepower = 4,500 (see note below)
Fuel Tank Capacity = 4,700 gallons (see note below)
Maximum Weight = See note below
Dynamic Braking = Yes
Control = Single
Cab Signals = Yes
LSL (Locomotive Speed Limiter) = Yes
Air Conditioning = Yes
Units are powered by an EMD 16-cylinder 710G3C-ES engine.

Units that have received a full engine overhaul meet Tier 1+ emission standards, while units that
have not yet received a full engine overhaul meet Tier 0+ emission standards. While all of the rebuilds are
being upgraded to 4,500 traction horsepower, the Tier 0+ units generally only make 4,300-4,400 horsepower.
Those units that have been overhauled and meet Tier 1+ emission standards are:
7233, 7235, 7242, 7243, 7250, 7253, 7254, 7258, 7269, 7278, 7291, 7293, 7296,
7298, 7305, 7308, 7313, 7319, 7323, 7329, 7330, 7331, 7332, 7333, 7334, 7335, 7336, 7337, 7338

As originally built by EMD, the SD90MAC had a fuel tank capacity of 5,700 gallons. While owned by Union Pacific,
the units started developing cracks in the frames around the fuel tank mounts.  UP worked with EMD to solve the
frame cracking problem by adding additional mounting brackets between the frame and fuel tank. In addition, the fuel
filler pipes were modified to only allow a maximum of 4,700 gallons of fuel to be added. All of the former UP units had
this modification when they were delivered to NS. NS did this modification to the former CIT units during rebuilding.

As originally built by EMD, the SD90MAC had a maximum weight of 415,000 pounds. After being rebuilt in
the SD70ACU program, the maximum weight initially increased to 420,000 pounds due to the additional weight
of the new widenose and cab.  Starting with the 35th SD70ACU rebuild, NS began adding additional weight to
each end of the units to increase the maximum weight to 432,000 pounds. The first 34 units will also have the
additional weight added as shop time permits. Those units that have received the additional weight are:
7230, 7231, 7232, 7233, 7234, 7236, 7237, 7239, 7240, 7241, 7242, 7243, 7244, 7246, 7247, 7249,
7251, 7253, 7254, 7255, 7257, 7259, 7260, 7266, 7269, 7271, 7272, 7274, 7275, 7277, 7278, 7280,
7281, 7284, 7285, 7287, 7288, 7289, 7291, 7295, 7296, 7300, 7301, 7302, 7303, 7304, 7306, 7307,
7308, 7310, 7311, 7312, 7313, 7314, 7315, 7316, 7317, 7318, 7321, 7322, 7323, 7325, 7326, 7328,
7329, 7330, 7331, 7332, 7333, 7334, 7335, 7336, 7337, 7338, 7339.

Original cab and electrical cabinet were replaced with new EMD SD70ACe style isolated cab,
AAR-style control stand, and electrical cabinet with Mitsubishi electronics.

Units retain their original TA22 main alternator and 1TB2830 traction motors.

Equipped CCB II computer controlled braking system.

Equipped with GE Ultra Cab II Cab Signaling and LSL (Locomotive Speed Limiter).

All units are equipped with NS LEADER/PTC (Positive Train Control) system.

Equipped for use in DPU (Distributed Power Unit) operation.

Equipped with Automatic Engine Stop/Start.

New electric parking brake added with brake wheel on the left side of the long hood.

Ditch lights added to the rear during rebuilding.

Units Equipped with Helperlink for helper service operations:

7229, 7230, 7232, 7235, 7236, 7237, 7240, 7241, 7242, 7243, 7245, 7246, 7247, 7249, 7253, 7254, 7265, 7273

Numbering Notes

NS 7229 was added to the SD90MAC numbering in December 2014 when the former UP 3481/8015
was sent as a trade-in to EMD in place of former UP 3666/8196, which was to have become NS 7319. Since
the former UP 3481/8015 was from the first UP SD90MAC order, NS chose to number it as 7229.

NS SD90MAC 7329 was originally supposed to have been former UP 8274, but UP retained that unit
and sent UP 8247 to EMD in its place. The unit was delivered to NS as UP 8247 and was not renumbered or
placed in service as an NS unit prior to entering the NS SD70ACU capital rebuild program. It was
numbered 7319 to fill the open 7319 number slot to make the 7229-7328 series a solid group of 100 units.

 
 

 

 

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