Two Union Railroad trains meeting on a bridge.

One of Union Railroads MP15's pull hard on the still warm steel slab cars.

On a cool autumn day east of the Steel City, Union Railroad MP15AC No. 24 and No. 10 lead 14 car loads of slab upgrade near Duquesne, enroute to Irvin Works in West Mifflin.

The Battle of Bull Run. Sure it takes place just about everyday on the Union, but it is still impressive to watch a quartet of MP15's claw their way upgrade.

Hot slabs out of ET head across the Mon towards the Irving Works further down the valley.

5 URR MP15DC's haul a loaded coke train towards Mifflin Yard for the WE interchange.

A 5-pak of URR MP15DC's race a tug up the Mon River.

Union Railroad pops out of the tunnel at Dravosburg with a coil steel train in tow.

This 5-unit lashup is actually going away in this photo. The train is shoving it's coke laden cars after making a turn to change directions.

Before the clouds rolled in today, URR 24 was bathed in bright sunlight outside the locomotive shops this morning. Canon 20D and 24-70mm lens.

Three URR switchers and a caboose returning from Braddock.

Three Union switchers work behind US Steel's sprawling ET plant. The miniscule locomotives give one a sense of just how massive a steel mill is.

The hottest train on the Union! Loaded steel slabs from USX Edgar Thomson works are headed for the rolling plant at Irvin, at right. The route to the left continues to the Clairton coke works.

Loaded slabs from USX Edgar Thomson Works (in Braddock) to USX Irvin plant. You can see the heat coming off of the slabs.

Heading down Dexter Lead toward the ET Plant. The 60 is ex-DM&IR; the 17 is the only unit in the new green scheme.