We are preparing to have contractors put in a new 750' gravel driveway on our land. Each contractor seems to have a different opinion on how much topsoil needs to be removed before they can start laying down the base layer. One guys says all of the top soil and another are saying 6" is enough, and one guy suggested 2" We have no idea what the correct answer is.
The land itself is pretty flat and has approx 12" of good topsoil resting on top of hard clay.
Any guidence here is really appreciated as we want to get the job done right, but do not have thousands of extra $$ laying around either.
Traffic on the road would be pickups and occaisionally compact tractors.