It is really crazy which historic buildings the government chooses to preserve and which ones they tear down. Same thing around here.Unfortunately they tore it all down! When I worked for the ADF&G on a saImon weir near there. I use to explore the old cannery and out crop buildings quite a bit. There was a lot of history there!
I know that some of their decisions are vendettas...one state guy swore to get rid of the "eyesore" of historic boathouses on our lake. They are still there after his death but they changed the rules and only allow the leases to be transferred once then they must be turned over to the state.
https://en.wikipedia.org/wiki/Stuntz_Bay_Boathouse_Historic_District