Time to make some replacement fence posts. Nothing like locust. fell them(irene) last summer, been sitting in pile drying some. Cheated some used chainsaw to run deep score line down one side length wise, following split in butt end. Grounds soft enough to drive now. If i wasn't so lazy.. i could just drive up to Freetown Freds and pull a few loose ones out for him, save him the work of redriving them.
Back in the late 60-s early 70's we fenced in about 3 acres for the horses we had at the time.
We used locust posts between 4x4 and 6x6 size, buried directly in the ground and tamped in place with the available rocks. To those we attached rough cut 1x6 oak boards. We had to predrill all the holes as we could not drive 16p galvanized nails through the oak and into the locust.
The majority of the fence is still in place today. The only sections to come down were caused by falling trees.
Your late my friend. Old lazy ass here went with T-posts a couple yrs ago. BUT, I'm still hauling locust for the local Amish. You know, you get 40-50 6 inchers in the back of the old chevy & she'll squat a little
the locust posts will survive up to 70-90 years in the ground if not in an actual swamp or extremely high water table area. theres posts now on farm that have been there since my GF grandfather put them in. He passed away in early seventies. Narly looking gray posts with old rusted clips and wire sticking out from them, years of other wire and clips up and down posts. Post are still good hard like rock.