Strange Derelict

It's not often you find a derelict of this size still out in the desert.  But there it was. Its rigging still running to the top of its boom and the boom itself housing a hawks nest.

I'm puzzled by its location.  Draglines like this one were often used in tandem with dredgers.  But to my knowledge there wasn't a dredger set up in the Osgood Mountain area.  I'm puzzled!  That's an exotic piece of equipment for a rancher to use to dig out a watering hole for his critters!