Same with our driveway. 2" of hard rain and the 1/3 mile road is a foot deep in running water below the hill. I have to get the tractor out to move the rock back onto the driveway and blade it off. We have 100 yards of a 10 degree grade uphill that is tough to maintain. Crusher run sets up pretty hard so that is what we use but the drainage culvert at the bottom of the hill plugs up with sediment and leafs requiring a lot of front loader work clearing the debris after a hard rain.