I won't even pretend to know enough about construction/infrastructure to know what's required to work on it, but there have got to be jobs that can be created that don't require technical skills. I've been reading that lots of people are now going to national parks because other stuff is closed, and they're leaving lots of trash - hire people to pick it up. Roads have potholes, and I can't believe that fixing those requires that specialized of a skill set.
And even for some of the things that are most efficiently solved with specialized skills and equipment, if there's a way to do them less efficiently by unskilled people, that's fine, since overspending on labor is totally fine if not desirable in this context.