How potholes are formed and fixed
Potholes can develop on any of the 16,000 lane km of paved streets and 2,900 lane km of backlanes in Calgary. Potholes form when snow melts into cracks in the asphalt and then freezes, expanding in the cracks. Meanwhile, the frost in the ground pushes up, weakening the asphalt. See an illustration of how potholes are created and how they are repaired.
Repairing potholes is a major part of Roads' continual maintenance of Calgary's roadways. In order to permanently fix potholes, dry pavement and warm weather conditions are needed. Pothole repair generally begins in April and goes throughout the summer months.
During our pothole repair program, crews are out working seven days a week. The majority of repairs are done during the day, but repairs on major roads are often done at night when there is less traffic.
You can help
To help locate and make repairs quickly, report a pothole using an eService request or by using your smart phone and the new 311 Calgary mobile app.
eServices - Report a pothole
Report a pothole using your smart phone
The 311 Calgary mobile app provides citizens with another option to submit and track their service requests. With the GPS function in smart phones, the app automatically selects the location of the pothole. The attached photo and information you provide will help City employees assess, prioritize and efficiently respond to your request.
Field crew reports
Roads inspects city roadways throughout the year to identify areas that need pavement repairs.
- Major roads are inspected twice a month.
- Collector roads are inspected once a month.
- Residential roads rely on 311 reports from residents and on incidental reporting by field crews.
When a pothole is identified, it is assessed and assigned a severity. The severity scale is rated from 1 to 5, with 5 being the most severe. The most severe potholes are scheduled to be repaired first.