if St Paul Union Depot Registered as Historical Sight then how?

Ray, it's only the structure that is protected by the National Register, not the contents. It just means that the structure can't be torn down or significantly altered. While we associate the William Crooks with the depot's lobby area, and yes I remember it from the 60's, it was probably never owned by them, and was just on display there.

Over the years, they have used that square footage for a few different restaurants. If I remember correctly, the restaurants have been on a raised platform, about three steps up. Are you sure it was jack hammered out?

It would be nice to have it back, but it is safe and with "friends" in Duluth. I'm sure that that has been discussed, but I would guess that the depot's operators find the square footage more valuable than the nostalgia and history.

Today...

BIG BOY 4005, Somewhere in the SPUD restoration photos it showed them jack hammering the concrete platform they even stated it was a slow process as the concrete used was super hard!

thanks for the clarity on how buildings are only parts inclusive of national register.