I like all the cars

1^st car – cut (dimensional?) wood on bulkhead flat

2^nd/3^rd cars – random pieces parts

4^th car – most of it looks like the parts that are cut off the outside of the log before they cut the dimensional lumber.  Up near the top, there looks to be a cut piece (about) the size of a railroad tie.

Could it be for firing a boiler of some sort?

Ken