On the Governor's husband, that shows a complete lack of awareness on his part. Telling people to stay home and then not following your own words is bad form all around. Shame on the Governor and him.
On the dam, it's a private dam not a public dam. The dam owners have been told since 1999 that the spillway needed repairs. It was only in the last couple of years that regulatory authority over the dam switched from the Feds to the State. So the Feds had almost 20 years to enforce the repair order, while Michigan had less than 2 years. The blame for this disaster sits entirely with the private owner not the State or the Feds.