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Overview - Potholes
Potholes form due to water that weakens the soil beneath the pavement and traffic loading. Winter and spring bring continuous freezing and thawing periods that can have a devastating effect on asphalt and concrete streets.
The Operations Division fills potholes year-round to mitigate the damage to the roadway. During 2014, approximately 5,000 potholes were filled by City crews throughout the calendar year.
In the winter months, a temporary patch is made with a "cold mix" asphalt product. "Cold mix" asphalt is used when weather conditions are not favorable for more permanent patching.
In warmer weather, "hot mix" asphalt is used to as a semi-permanent patch to restore the driving surface of a roadway where potholes form. The City operates a dump truck with a "hook-lift" roll-off style body that heats hot mix asphalt for road application.
The City of Janesville also owns a single-operator "Pro-Patcher" truck that spray-injects patching material into potholes and larger cracks. This piece of equipment works best on concrete pavement, but it may also be used for bituminous (asphalt) pavement pothole filling.
Overview - Pavement Patching
The Operations Division is responsible for performing small to medium sized pavement repairs in areas where excavations occur or pavement is damaged to the point that a simple surface patch will not suffice.
Pavement repairs are completed on small to medium sized areas of pavement if the following occurs:
Water main break
Electrical or plumbing excavation
Pavement "blowup" or heaving
Deterioration of existing repairs
Heavy, localized deterioration of pavement (alligator cracking)
Large-scale pavement rehabilitation, resurfacing, and reconstruction efforts are coordinated through the Engineering Division.