It was more like 1.5 hours in the end! Guess he'd already doubled the estimate before telling me.
One of the other workers got narky at me for taking a photo of the site, though. I guess it's fair, he didn't know I was trying my best to keep their faces out of shot.
But also, they were working in public directly in front of my home, having broken my internet connection, and they'd pulled up the bike path - which I wanted to inform my husband about who was otherwise going to ride home on it.