Yes. A broken or leaking sewer line can cause a sinkhole. Water escaping from the break, and soil falling into the pipe through the gap, slowly carry the ground away until a void forms under the surface. Eventually the lawn, sidewalk or driveway above it sinks or caves in.
Most sinkholes caused by sewer lines are small, a depression in the lawn or a soft spot you can push a shovel into. But they can grow, and they can form under sidewalks, driveway edges and foundations. Knowing the early signs lets you fix the pipe before the ground gives way.
How Does a Sewer Line Cause a Sinkhole?
A break opens
A crack, separated joint or collapsed section lets water out and soil in.
Soil washes away
Every time water drains, a little more soil is carried into the pipe or away from it.
A void forms
An empty pocket grows under the surface while the top still looks normal.
The surface drops
The ground above can no longer support itself and sinks or caves in.
What Are the Warning Signs?
- A depression or dip forming over the sewer line.
- Soft, spongy ground that gives underfoot.
- Cracks in a sidewalk or driveway near the line.
- Wet ground or sewer smell in the same area.
- Slow drains or repeated backups inside.
- A drain cable coming back with soil or gravel.
What Should You Do If a Hole Appears?
- Keep everyone away. Mark it off from kids, pets, mowers and vehicles. The void underneath may be bigger than the hole.
- Do not fill it yourself. Filling the hole without fixing the pipe hides the problem and it will return.
- Limit water use to stop feeding the washout.
- Call the utility if it is near the street: Pine Bluff Wastewater Utility at 870-535-6603 can check whether the public main is involved.
- Call a sewer contractor for a camera inspection of your line.
How Is It Repaired?
A camera inspection confirms the break and a locator marks it. The crew excavates at that spot, removes the washed-out soil, replaces the damaged pipe, and rebuilds the ground underneath with compacted gravel so it will not settle again. See broken and collapsed sewer pipe repair and leaking sewer line repair.
Could It Be Something Else?
Not every sinking spot is a sewer problem. Rotting tree stumps, old buried debris, poorly compacted fill and leaking water lines can also cause settling. A sewer smell, slow drains or a wet spot along with the dip points toward the sewer line. The camera tells you for sure.
Why Clay Soil Matters Here
Much of the ground around Pine Bluff is clay that swells when wet and shrinks when dry. That movement can open joints in older clay and cast iron pipe, and once a leak starts, the washout can grow quietly for a long time. Homes with older pipe and a history of slow drains should take any dip in the yard seriously.
This is one of the situations where our 24/7 emergency sewer repair matters most. Read more about how we handle sewer line repair in Pine Bluff.
Keep people away and call. My crew will find the break on camera and fix it before it grows. 24/7.
FAQ
Can a sewer sinkhole damage my foundation?
If the washout is close to the house, it can undermine soil under the foundation edge. Fixing the leak early prevents that.
Who pays if the sinkhole is near the street?
It depends on whether the break is in your lateral or the public main. The camera and the utility can tell.
Does insurance cover sinkhole damage from a sewer line?
Coverage varies. Check your policy and keep the camera footage for your claim.