BART, the Bay Area Rapid Transit light-rail line, is perfectly appropriate as a .GOV site. It's administrated as a branch of the California government, with a Board of Directors elected by residents of the area they serve.

I don't know what davisut4health.gov was, but right now it just appears to be an alternative URL for the Davis County Library. (And oddly enough, your post appears to be the only reference to this domain on the Internet!)