Posted on August 23, 2023August 23, 2023 by Mud MonkeysGravel Driveway Repair How we handle a sloped drive with a history of washing out: We mix lime powder and large rock then pack it tight. The larger rock embeds and is too heavy for most runoff to budge. Not quite as smooth to drive on, but not bad, and the good thing: it holds. This was a drive we did yesterday in Ashland City.