A welder grinds some fresh weld repairs to a plow at Union Pacific’s Downing B. Jenks Shop at North Little Rock, Arkansas, on May 19, 2015. On the left is EMD SD40-2 No. 3071 which is in the pro... (more)

During a pouring springtime rainfall at North Little Rock, Arkansas, EMD SD40-2 No. 3361 is sitting just outside the main shop building at Union Pacific’s Downing B. Jenks Shop on May 20, 2015. ... (more)

First shift paint shop supervisor David Smith inspects a Scotchlite Union Pacific shield and wings at North Little Rock, Arkansas, on May 18, 2015. These smaller “baby wings” are used on older... (more)

Painter (carman by trade) Gary Dunlap carefully applies the Scotchlite flag decal to the side of Union Pacific ES44AC No. 5401 inside the paint shop at the Downing B. Jenks Shop at North Little Ro... (more)

Union Pacific SD70ACe No. 4141 sits in the main shop building for minor work at UP’s Jenks Shop at North Little Rock, Arkansas, on May 19, 2015. The day before, the locomotive was given a fresh ... (more)

Three EMD locomotives in different stages of overhaul sit outside on the huge Downing B. Jenks Locomotive Shop at North Little Rock, Arkansas, on the afternoon of May 19, 2015. GP38-2 No. 689 and ... (more)

UPY No. 610 sits in the sandblasting bay at the paint shop at Union Pacific’s Jenks Shop in North Little Rock, Arkansas, on May 19, 2015. After all the desired paint and lettering is removed in ... (more)

A welder puts some elbow grease into it as he grinds fresh welds on repairs to the nose of Union Pacific SD40-2 No. 3071 at the Downing B. Jenks Shop in North Little Rock, Arkansas, on May 19, 201... (more)

A painter (carman by trade) in the paint shop at Union Pacific’s Downing B. Jenks Shop at North Little Rock, Arkansas, begins adding the classy, winged nose logo to UP GE ES44AC No. 5401 during ... (more)

Inside the main shop building at Union Pacific’s Downing B. Jenks Shop at North Little Rock, Arkansas, locomotives assemble for rebuild and overhaul on May 19, 2015.

Missouri Pacific owned over 300 SD40-2s, but the locomotive that really defined the MP in the 1970s and beyond was the EMD GP38-2 - The MoPac owned 264 GP38-2s (along with 6 GP38s). Built in Augu... (more)

A trio of Missouri Pacific SD40-2s (3205, 3215 and 3190) maneuver through the yard in North Little Rock, Arkansas, on June 2nd, 1983. Meanwhile, a coal train led by Burlington Northern C30-7 5006... (more)

Looking like a model railroader's kitbashing project, Rock Island GP40 4710 sits in the deadline in North Little Rock, Arkansas, in May 1985. The deadline is made up of former Rock Island and Wes... (more)

Retired DD40X No. 6938 makes a wonderful display outside of the Jenks Locomotive Shop in North Little Rock. The Union Pacific rostered 47 of these massive machines, which measure in at 98 feet lon... (more)

The Arkansas State Capitol building looms in the distance and across the Arkansas River as UP 844 rests before another day of Fall trips to Bald Knob.