BALLAST WASHED GRAVEL is the gravel ingredient of concrete and has historically been used to form a bed for a road or railroad. It is often used as drainage gravel. Ballast Washed Gravel is 21/2″ thick and sold in 3000 lb. super bags only at /yard. (Bulk pricing available) . Read more. Read more. View Detail. Bark Brown Crushed Gravel. BARK BROWN CRUSHED GRAVEL is .