About 2 years ago an old, rotting pole that was standing out front of our place was replaced by a new one (after it sat on our lawn for 5 weeks), the old one was left on the lawn for almost a month before some guy in a pick-up with a chain-saw came by, cut it into sections which he tossed into his truck. (POV, not a work vehicle)
I had to clean up the saw dust.
As to if you can cut it up and keep it, I’ve no clue. But if you do I’d be interested to hear if you catch any flack about it.