EMDX Demonstrator 90 sits at EMD's LaGrange Plant.

Powered by a pair of Union Pacific EMD SD90MAC-H 6,000 hp locomotives, a long southbound UP freight grinds upgrade out of Walong, California, climbing Tehachapi Pass on March 28, 2001. This area i... (more)

Electro-Motive Division SD90MAC-H locomotives, along with EMD’s test car, head through Rocky, Colorado, for some testing at Plainview on February 2, 1998. Leading the way on the west end is EMD No... (more)

Union Pacific EMD SD90MAC-H No. 8930 leads an eastbound freight through downtown Laramie, Wyoming, on September 14, 2006.

A pair of EMD SD90MAC-H units and a Southern Pacific SD40M-2 pull a westbound intermodal train through Utah's Tooele Valley on July 8, 2000. UP 8555 and 8553 were assembled by Super Steel Schenect... (more)

A long, heavy Union Pacific freight powered by two SD90MAC-H 6000 horsepower locomotives grinds past the south (east) switch of Walong on California’s Tehachapi Pass on March 28, 2001.

On March 6, 2001, a southbound Union Pacific manifest freight climbing the steep grades of Tehachapi Pass has stalled at Bealville, California, with locomotive problems. No surprise, since this he... (more)

Big MAC Attack! Two 6000 Horsepower SD90MAC-H locomotives drag a lumber laden manifest upgrade at Bealville.

A southbound Union Pacific manifest freight climbing the steep grades of Tehachapi Pass has stalled at Bealville, California, with locomotive problems. No surprise, since this train is powered by ... (more)

Two Union Pacific EMD SD90MAC-H locomotives pull an eastbound manifest freight up Tehachapi Pass at Cable, California, on a sunny March 8, 2001.

BNSF run through power leads an empty oil train through Smithton PA in beautiful fall colors.

Two Union Pacific SD90MAC-H's (the true 6000hp version) going up Tehachapi Loop, California October 06, 2001.

Two new Union Pacific SD90MAC-H #8523 and #8522 built 4/99 at Electro-Motive Canada London, Ontario sitting in Canadian Pacific yard May 22, 1999 . Photographer Pierre Ozorak. Photo taken f... (more)

After some stationary high-altitude testing by Union Pacific and Electro-Motive Division, the four 6,000 horsepower SD90MAC-H locomotives, got a workout with some tonnage. A test train consisting ... (more)