Annual pothole repairs are underway as City crews address road damage caused by winter freeze–thaw cycles.

Potholes form when fluctuating temperatures allow water to seep into small cracks in the pavement. As temperatures drop, the water freezes and expands, then contracts as conditions warm. Over time, this repeated cycle weakens the asphalt. Traffic travelling over these weakened areas can cause the surface to break apart, creating potholes.

Late winter and early spring typically bring increased pothole activity due to melting snow, rainfall and ongoing temperature fluctuations. Localized flooding may also cause temporary lane and road closures in some areas.

Roads staff regularly patrol roadways and respond to reported issues as weather conditions permit. High-traffic areas and locations where conditions pose safety concerns are prioritized. Crews use temporary cold patch asphalt for repairs. More durable hot mix asphalt will be applied once local asphalt plants reopen for the season.

The City maintains more than 2,200 lane kilometres of roadway. While pothole repairs take place year-round, activity increases significantly during the spring thaw.

Residents are encouraged to report potholes to help crews identify and address issues. Reports can be made by calling the City’s 24/7 Dispatch line at (807) 625-2195 or online at thunderbay.ca/potholes.

Motorists are reminded to reduce speed and maintain a safe distance when approaching road maintenance operations to ensure the safety of both workers and other drivers.

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Contact:      Ian Spoljarich, Manager – Roads Division, 807-684-2408