A gravel driveway that washes out after every heavy rain is showing you where the water goes. On hillside lots across eastern Kentucky, southern Ohio and West Virginia, water running down the drive picks up loose stone, cuts ruts, and leaves the gravel at the bottom. More gravel on top fixes the look for a few weeks; fixing the water fixes the driveway.
Get water off the driveway, not down it
- Crown or cross-slope. The surface should shed water to the side instead of carrying it down the center, before it can gather speed.
- Cross-drains. On longer or steeper runs, water bars, open-top culverts or shallow swales across the drive turn water off at intervals so it never builds into a channel.
- Ditches and culverts. Water moved to the edge needs somewhere to go. A ditch along the uphill side and a culvert where the drive crosses a low spot keep runoff from crossing the surface.
Build the base before the surface
Most washouts start with a weak base. A stable gravel drive is built in layers: a compacted base of dense-graded stone that locks together, with a surface layer on top. Clean, single-size stone looks neat but rolls under tires on a slope; dense-graded material, often sold as crusher run, compacts into a firmer surface.
Match the fix to the grade
- Gentle slopes usually respond to regrading, a crown and a compacted surface layer.
- Steeper sections often need cross-drains at regular spacing, with attention to where each one discharges.
- Very steep or heavily used stretches may be candidates for paving the worst section while leaving the rest gravel.
Before you order stone
Measure the length and width of the problem areas and note where water enters and leaves the drive during a storm. Photos taken during a rain are the most useful thing you can bring to a site visit. The dirt, mulch and gravel order page has a coverage calculator for quantities, and the site preparation and driveway paving pages explain the work involved.