Proper Stone for Dirt Driveways

Medium Gravel

• Measuring between 3/4- and 1 1/4-inch grade, medium gravel is composed of stone crushed into irregular shapes. It's used to build foundations for pavements because the sharp edges fit snug together when compacted. If drainage is an issue on your dirt driveway, spread a 2-inch thick layer of medium gravel at ground level over the site. Cover the gravel with a 2-inch thick mix of gravel and dirt. Shape the surface into a crown so the lowest point runs along the sides of the driveway. Once the dirt and gravel are compacted, water will naturally flow off the sides of the driveway.

Small Gravel

• The average size of small gravel is between 3/8 inch and 3/4 inch. The tiny stones in small gravel break down faster than medium gravel, creating a stone powder. Small gravel is a fitting choice if you want to firm up a driveway that develops dips and tracks through the surface. The stones reinforce soil with a sandy or clay consistency, while the stone powder will cling to the dirt like cement. Add a 2-inch thick layer over an existing dirt driveway and mix it in with the top layer of dirt using a shovel or rake. Shape the driveway into a crown and moisten it lightly to saturate the stone powder without causing it to float away.

River Stones

• River stones come in an array of natural colors like greens, reds, pinks and blues. They can transform a dull, flat dirt driveway into a vibrant surface with subtle textures. Use stones that measure 3 inches and less to add beauty to the driveway. Lay them along the sides of the pavement to define the shape of the driveway and improve drainage so puddles don't form along the sides.

Crushed Granite

• Crushed granite is reddish brown in color and comes as sand or small, medium and large rocks. The biggest advantage of mixing crushed granite with an existing dirt driveway is that granite stabilizes when coated with a resin. It offers a sturdy, almost solid, surface that won't wash away. Consider adding crushed granite if your dirt driveway continually has drainage or erosion issues.