I'm sure there is a fair bit of construction that can be done, like this type, that uses machinery and few workers. If the same boring machine is used by the same individual every day, cleaned after work, i don't see a problem. As long as workers on the ground are keeping their distance and not congregating for lunch, no different than the grocery store i was in yesterday. The greatest risk will likely be getting to the work site unless you drive yourself. Right now that shouldn't be a problem. I guess each individual has to decide their level of comfort.