My feeling would be this. You already have the machine, if you’re dead set on doing the work yourself, either buy a toothed HEAVY DUTY bucket that’s a few inches wider than the machine OR buy a tooth bar that slips onto your existing bucket. Then start pulling the material back in sections at a time. The key to it will be compacting it all as you go, so you will need a vibratory roller or a good size plate compactor. The key to it is to get the sides lower than the middle and the inside/outside corners built up/cut down low enough to let the water shed off the sides. If you don’t have enough existing material you will need to import road base to get the drive graded properly. There’s no doubt this is going to cost some money to get back into shape, on a shared road like this it becomes a nightmare getting everyone to agree to a price and even harder to get them to pay. The biggest problem I see is that any good material has been pushed/washed off the road so it looks like you’ll be trying to grade round rocks from softball size to bowling ball size. Why should you have to buy attachments and rent equipment to repair a road that’s shared by 35 others? I’ll answer, probably because it bugs the crap out of you that no one else will do it? Still doesn’t mean you should foot the bill. What happens if your machine breaks while doing it, who pays for that?