I believe the people responsible for maintaining Greensprings have chosen to leave this old abandoned hay laoder here for educational purposes, to remind us of how this land was farmed in the early 1900s. That seems perfectly reasonable. Still, I think my preference would be to find some way to either restore this old relic, if that's even possible at the point, or simply to remove it altogether and thereby to return this area to its more "natural" state.
Interesting piece, though. A now seriously deteriorated label indicates that it was manufactured by New Idea, Inc. in Coldwater, Ohio.