Look what I found...
On my way back from Casper on Saturday, I spotted this along the highway out in the vast expanse of nothingness between Casper and Shoshone. It's a chunk of the wall out of an old boxcar. It's sitting along a railroad siding right by where an old loadout facility used to stand, but was torn down several years ago... The date on the bottom says that it was built in 2 of 41.