Thanks for the response! I'm in upstate NY, by Syracuse. Just to clarify,
A foot or two of initial base is Shale and clay mixture(topsoil was removed). The escavator proposes putting down Mirify on top of the initial base, then another 6-12" base of only shale (which I have on my property...
I have a 1000' driveway on raw land and the escavator is just about finished with the base. He is proposing Milify fabric, then a base of shale on top of 1st base. The reason for the shale is that when escavating, he discovers a shale "quarry" on my property and its using the shale for the...