Spot a pothole? Call 406-582-3208 and we'll smooth things over.
Departments > Public Works > Streets > Pothole Patching

Pothole Patching

A patched potholeWE NEED YOUR HELP!

With over 200 miles of streets in our City, it's almost impossible for us to traverse every street on a regular basis, so we are turning to you for help. As you go about your daily travels around Bozeman, make note of potholes that need repairing and give us a call. We have a dedicated phone line specifically set up for you to let us know where repairs are needed - 406-582-3208. We will attempt to make the street repairs within one week of receiving your report. And if you have questions, give us a call at 406-582-3200.


Potholes are common to areas of the country that generally have several freezing-thawing conditions during the winter months. A pothole starts as a small failure in the road surface where water has seeped through cracks and into the road base. As the water freezes it expands; then when it thaws a void is left under the asphalt. As vehicles drive over this area, the asphalt fails and a pothole is formed. We try to prevent this from happening by crack sealing any cracks found during the spring, summer and fall months. (Crack sealing is the process where cracks in the street are sealed with hot rubberized material which prevent water from seeping in.)


Depending on the time of year, we will use two different types of material to fill the pothole.

Hot Mix

Asphalt that is heated to about 300 degrees, which, when it hardens, it matches the roadway asphalt. 
Used during warm weather months (starting in April or May).

Cold Mix

Asphalt that is warmed before being put in the hole.
Used during cooler weather months.
Will not harden to the extent of Hot Mix as it is not heated to that extreme temperature.


Potholes are filled with one of the above materials, depending on the time of year. However, if there are several potholes forming close together on one stretch of street, we will use a process called durapatching. This process uses a layer of hot emollient on the street with Hot Mix poured over that, which then seals and smooths the road.

Re-paving a street
A pothole patch with cones