To build a gravel driveway, strip the topsoil and soft ground, shape a firm subgrade with a crown or cross slope, lay and pack a crushed rock base, then finish with surface rock that sheds water. Most failed drives trace back to a skipped base or poor drainage, not to the rock on top.
Plan the route, the width and the water
Start on paper. Mark where the drive leaves the road, where it ends, and any turnaround or parking pad. A single lane for cars is narrower than one that has to pass a truck or farm equipment.
Then watch the ground in a hard rain. See where water comes from, where it sits and where it leaves. A drive laid across the path of runoff becomes a dam or a creek bed. Running it along a slight rise, or giving the water a ditch or a low side to escape by, saves years of repairs. On flat central Illinois ground, building the drive slightly above the yard is often the simplest way to keep it dry.
Locates and the entrance come first
Before any digging, put in a locate request with JULIE. Our guide on calling JULIE before you dig explains the notice it asks for and which private lines it will not mark.
Next, find out who owns the road at the entrance. State routes, county highways, township roads and city streets each have their own office. That office may require a permit and may want a culvert under the drive where it crosses a ditch. Get that answer before the work is booked, because it can change the layout. Our driveway culvert guide covers what to ask.
Strip the topsoil and find firm ground
Topsoil is made to grow grass, not to carry weight. It holds water and compresses under load, so it has to come out along the whole route. Under it, look for firm subsoil. Soft pockets, old organic fill and wet spots get dug out too.
This is the step most do-it-yourself drives skip, and it is the one that decides how long the drive lasts. The spoil can be spread elsewhere on the property or hauled off. A skid steer handles a short drive in town. A long lane is quicker with an excavator and a dump truck. Either way, the goal is the same. Every inch of rock should sit on ground that does not move when a loaded truck drives over it.
Shape the subgrade: crown, slope and ditches
The shape goes into the dirt before any rock arrives. A crown, high in the middle and falling to both sides, sends rain off the drive. On a hillside, a cross slope tilting toward the downhill side does the same job.
Where water collects along the edge, it needs a shallow ditch or swale to carry it away. Without one, the water soaks into the base from the side and softens it. Pack the subgrade before the rock goes on. Then check it after a rain if the schedule allows. Puddles on bare subgrade point to low spots that will become potholes later, and they are easy to fix at this stage. Our grading and dirt work is the same skill applied to yards and lots.
Base rock in layers, packed hard
The base is usually CA-6, a crushed rock with fines that locks together when packed. On very soft ground, larger rock goes down first to bridge the weak spots. Our guide to gravel for driveways in Illinois covers the choices.
Spread the base in layers rather than one thick dump. Each layer gets shaped to the crown and packed before the next goes on. Rock packs hardest with a little moisture in it, so a dry, dusty load may need water. A thick layer dumped all at once packs on top and stays loose underneath, and that loose rock is where ruts start. Keep checking the crown as you go, because it is easy to flatten while spreading.
Surface rock and finishing the edges
The surface layer is what you drive and walk on. Many Illinois drives simply use CA-6 to the top, packed and crowned. Others take a thin layer of cleaner or smaller rock for less dust.
Finish the edges as carefully as the middle. Rock that slopes off gradually into the grass holds its shape. A hard step at the edge breaks down and spreads. At the road end, follow whatever the road office asked for. Then let traffic help. A new drive settles a little in its first few weeks. A light regrade and a top-up after the first wet season often finishes the job properly.
Doing it yourself or hiring it out
A short, flat drive on firm ground is a fair weekend project with a rented skid steer and delivered rock. The hard parts are removing enough soft ground, getting the crown right and packing the base properly.
Longer drives, slopes, soft ground and road entrances are where an excavation contractor pays for itself. Companies that install gravel driveways are usually excavating, grading or dirt work outfits, because the job is mostly dirt and drainage with rock on top. We build gravel driveways from bare ground, rebuild failed ones, and build heavier field entrances. Send a photo from the road and of the worst spot, and Jon will price it himself.
The Short Version
- Plan the route around where water comes from and where it leaves.
- Call JULIE and check with the road office before anything is dug.
- Strip topsoil and soft spots; rock must sit on firm ground.
- Shape a crown or cross slope into the subgrade before rock arrives.
- Lay base rock in packed layers, then finish with surface rock and gentle edges.
Quick Answers
What kind of company installs gravel driveways?
Usually an excavating or grading contractor, since most of the work is removing soft ground, shaping for drainage and building a packed base.
How thick should a gravel driveway be?
It depends on the soil and the traffic. Soft ground and heavy trucks call for a deeper base. Firm ground and cars can get by with less. Jon sizes it after seeing the site.
Do I need fabric under a gravel driveway?
Fabric can help keep rock separate from soft clay, but it does not replace digging out soft ground or building a proper base.
When can I drive on a new gravel driveway?
A packed base can usually take traffic right away. Expect some settling in the first weeks, and plan a light regrade after the first wet season.
See our driveways & gravel service or call (217) 710-0606.