CEDAR RAPIDS, Iowa (KCRG-TV9) - You’ve probably noticed a lot of potholes springing up (or sinking down, rather) recently. The rain and snowmelt have contributed to that, and the temperatures have done a good job of making it even worse.
Potholes start after cracks form in the pavement. This can happen from the weight of typical traffic or from the pavement heaving upward from frost. Water, either from rain or snowmelt, gets into the cracks. When the temperature drops below freezing, that water turns to ice and expands, making the cracks bigger. Water is able to get underneath the pavement, and the cycle of freezing and thawing creates an empty space underneath the pavement. The weight of traffic driving over that empty space underneath the road causes it to cave in, creating a pothole.
The weather lately has been perfect for making potholes.
Until temperatures stay above freezing most nights, we’ll continue to deal with potholes. That’ll be especially true after rain, or whatever snow falls from here on out melts away.