EMD’s SD90MAC-H locomotives head through Leyden, Colorado, for some testing at Plainview on January 30, 1998. Leading is EMD No. 8504 that is painted in a special scheme for EMD’s 75th anniver... (more)

Electro-Motive Division SD90MAC-H demonstrator locomotive No. 8504 heads west on Union Pacific’s former Rio Grande main line at Rocky, Colorado, for some high-altitude testing on February 3, 199... (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 ... (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)

During the high-horsepower race in the late ‘90s, four 6,000 horsepower Electro-Motive Division SD90MAC-H locomotives, along with EMD’s test car, head up to East Portal, Colorado, for some hig... (more)

Electro-Motive Division SD90MAC-H No. 8504, specially painted for EMD’s 75th anniversary, is the DPU on a westbound loaded coal train that is testing on Union Pacific’s Moffat Tunnel route. Th... (more)

Shamu
Four 6,000 horsepower Electro-Motive Division SD90MAC-H locomotives, along with EMD’s test car, head up to East Portal, Colorado, for some high-altitude testing on January 30, 1... (more)