I am not sure the location you mentioned in your post.

However, I've seen two BSNF trains heading North on the tracks along I-5 North of the Great Wolf Water Park (MP 88 on I-5), another at Maytown exit on I-5, both with strings of well cars heading North / Geographical East.

Recently there is a string of 40 foot well cars on small siding just North of MP 88 on I-5. Was told by another foamer that there is more storage of cars occurring on this trackage, but not blocking the main line, just the sidings.

I've seen UP units on TR out near Fredrickson a few years ago and was very surprised why they were there; never found out why.

Another area for me to check out soon as well.

I would think BNSF would have some concern running their bigger/new locomotives on some of the TR trackage in that area.