Union Pacific EMD SD70ACe No 4141 basks in the low afternoon sun at the railroad’s North Little Rock Downing B. Jenks Shop on May 18, 2015. The specially-painted locomotive is dedicated to the G... (more)

George Bush Presidential Library and Museum seals decorate both side of the nose on Union Pacific EMD SD70ACe No. 4141, specially-painted and dedicated to the George Bush 41 Presidential Library a... (more)

At Union Pacific’s Downing B. Jenks Shop at North Little Rock, Arkansas, a welder (boilermaker by trade) carefully builds new lower pilot assemblies for the railroad’s SD40N rebuild program on... (more)

Several locomotives sit just outside the north side of Union Pacific’s massive locomotive shop at North Little Rock, Arkansas, on May 19, 2015.

Union Pacific EMD GP40-2 No. 1383 is being rebuilt at the railroad’s Downing B. Jenks Shop at North Little Rock, Arkansas, on May 20, 2015.

Two painters apply the Scotchlite striping to the side sill of Union Pacific GE ES44AC No. 5401 during a repainting in the paint shop at the railroad’s Downing B. Jenks Shop in North Little Rock... (more)

Two welders get horizontal to replace a worn out floor in the nose of Union Pacific SD40-2 No. 3071 during the locomotive’s transformation into a SD40N at UP’s Downing B. Jenks Shop at North L... (more)

Union Pacific EMD SD70M No. 4609 has been sprayed with a coat of gray primer and dries in one of the paint shop bays at UP’s Downing B. Jenks Shop at North Little Rock, Arkansas, on May 19, 2015... (more)

A machinist makes adjustments to the front windshield wipers of Union Pacific GP38-2 No. 680 after an overhaul at the railroad’s Downing B. Jenks Shop in North Little Rock, Arkansas, on May 19, ... (more)

Rebuilt traction motors, along with new wheels and bearings, wait to be installed in overhauled locomotives at the railroad’s Downing B. Jenks Shop in North Little Rock, Arkansas, on May 18, 201... (more)

A recently rebuilt Union Pacific SD40N No. 1783 rides the transfer table at the railroad’s Downing B. Jenks Shop in North Little Rock, Arkansas, on May 19, 2015. The former EMD SD40-2 has gone t... (more)

The skeletons of two EMD SD70M cabs, including the old cab from Union Pacific No. 4323, sit in a used parts supply outside the shop buildings at Union Pacific’s Downing B. Jenks Shop at North Li... (more)

A tedious and thankless job that goes with every good paint job is all the work spent prepping and masking before applying paint. Here, several painters mask a portion of Union Pacific SD70ACe No.... (more)

Union Pacific No. 4141 (George Bush 41) was in the paint shop at UP’s North Little Rock’s Jenks Shop for some touch up work after installation of a new plow. At this point, the specially-paint... (more)

Several welders replace worn out floors and sheet metal during Union Pacific SD40-2 No. 3071’s transformation into a SD40N at the railroad’s Downing B. Jenks Shop at North Little Rock, Arkansa... (more)