It's almost always water

A gravel driveway is supposed to shed water off to the sides. When it's flat or dished in the middle, water sits instead. Every tire that rolls through a puddle pushes the soft gravel out, and the hole gets a little bigger. Add a Montana winter of freezing and thawing and a small low spot turns into a pothole by spring.

Signs your driveway has a water problem

  • Puddles that hang around for a day or more after rain or snowmelt
  • Washboard ripples across the road, especially on hills and curves
  • Ruts that follow the wheel tracks
  • Soft spots that squish or sink when loaded trucks drive over them
  • Gravel washed down to the low end of the driveway

Why filling potholes doesn't last

Shoveling gravel into a pothole feels like a fix, but the driveway is still shaped the same way. Water still collects in the same low spots, and the loose gravel you just added is the first thing to wash out. That's why the same holes come back every spring.

What a lasting fix looks like

  1. Cut out the potholes. A grader cuts the surface down below the bottom of the holes instead of just filling them.
  2. Reshape the crown. The middle of the driveway gets built slightly higher than the edges, so water runs off both sides.
  3. Give the water somewhere to go. The shoulders and ditches are shaped so runoff drains away from the road instead of along it.
  4. Add material where the base is thin. Worn-out spots get new base rock before the top layer goes back on.
  5. Compact it. A roller packs everything down so it holds its shape.

A driveway that drains right often needs less new gravel than people expect. The reshaping does most of the work.

When to do it

Late spring, once the ground has thawed and dried out, and early fall, before it freezes, are usually the best windows. Grading a driveway that's still soaked just moves mud around.

Short driveway or long ranch road?

On a short driveway, a landscape rake and a load of gravel can buy you a season. On a long private road or ranch road, a motor grader and roller get it done right, and much faster than doing it by hand.

Tired of the same potholes?

We regrade driveways and private roads across Ravalli and Missoula counties with our own equipment and dump trucks, bringing in a grader and roller when a road needs them. Call or send a few photos and we'll tell you what it needs.