As the third trick operator at North Platte’s East Hump checks his array of glowing computer screens, cars continue to roll down the hump to be classified. A UTLX tank car rolls by the lights of... (more)

The last car of a potash train to be classified rolls down to its track on the East Hump at North Platte, Nebraska, on the afternoon of May 3, 2011. Union Pacific SD38-2 No. Y801, work finished fo... (more)

After being down in the bowl moving an errant car at the East Hump Yard, Union Pacific No. 3138 leads sister SD40-2 No. 3267 and SD38-2 No. Y810 back up the grade and over the hump on May 4, 2011.... (more)

A set of hump power crests the East Hump as it finishes sorting another train at North Platte, Nebraska, on May 4, 2011. An early spring storm moves east of the city and brings out a last few rays... (more)

UP SD40-2's 1799 and 3111 shove a cut of cars to the hump at the Alton & Southern's Gateway Yard.

Two hump sets pass each other as the sun breaks out behind a tropical downpour on a steamy afternoon at Selkirk Yard.

The Remote Control Job pushing a cut of cars over the hump

An NP slug helps an EMD switcher push long strings of cars over the hump.

Sister locomotives CSXT 2435 and 2436 (former L&N units) are both dedicated hump units with accompanying slugs. Note the modified noses.

Penn Central X 3. The NS 1073 PC heritage unit sits in old Penn Central territory at the Selkirk engine service area. It is framed in the foreground by CSX 1015, an ex Conrail MT-6 slug, former CR... (more)

Alligator No. 5162 works the Eugene hump.

Probably The Best Thing About Being At Selkirk Yard Is There's Always Something Moving, And On Nice Days Like This One, Sunsets Are Beautiful Over The Yard, Here Is Y302 Pushing A Cut Cars Back To... (more)

This is why one goes to Selkirk Yard, four trains in one frame all moving at the same time. As Q017 comes into the yard for a re-crew (CSXT 7358 3rd). Intermodal Q156 is just leaving to head south... (more)

A remote control set pushes cars over a hump as it sorts the rolling stock

BNSF 1909, which would definitely look better with a plow, and another 40-2 are shoving another cut of cars over the hump at the west end of Argentine Yard.