Hydro dug up sections of new sidewalks around us. When we enquired, we were told that they are required to replace them back to original state. However, we then pointed out that similar cuts had been made over a year ago and the sidewalk still wasn't back to its original state, and in fact, the "temporary" repair of asphalt had sunk, making a trip hazard. So from what I can see, there is a requirement, but it doesn't necessarily come with a timeline.