There are over 5,200 lane miles of paved roadways in the County unincorporated area and it's inevitable that somewhere in this large area of streets there will be potholes. SACDOT's policy is to "Repair all potholes as soon as possible."
SACDOT crews routinely inspect for -- and repair -- potholes as they are found. In addition, pothole repair requests are called in or e-mailed to Customer Service by residents, law enforcement or other agencies. Twice a year the Department conducts a "Pothole Sweeps Week" program, which is an intensified effort to identify and repair potholes using additional crews and equipment. This program is part of continuous efforts to improve preventative maintenance activities that prepare road surfaces for the storm season and then repair potholes caused by inclement weather.
What causes potholes?
- Water: Water seeps into cracks in the roadway surface, going down to the base. The soil under the base becomes saturated with water and turns from hard soil into mud. The road base now has no support and a hole forms in the soil under the road base.
- Traffic: With the road base no longer supporting the roadway surface, the roadway surface collapses forming a hole. Extra weight from trucks increases the amount of potholes on local roadways.
How are they fixed?
The pothole is fixed by cleaning out the pothole, placing new asphalt, and compacting it to roadway level.
Why do they reappear?
Pothole repairs are intended to be permanent, and normally last for many years if the causes of the initial problem are corrected. Repairing potholes during inclement weather, or when an immediate repair of failed roadway is needed to maintain safety, may require the use of softer, temporary materials, until such time that a permanent repair can be performed.
To report a pothole located on an unincorporated area street or roadway:
Call 311 or 875-4311 or report online at