For those of you that have been dragged on a walk across the Stone Arch Bridge on the way to or from a football or baseball game, the bridge that collapsed is the first bridge south of the the Stone Arch Bridge. That would be downstream away from the waterfall.
I tried to link to the St Paul Pioneer Press photo site but it doesn't seem to have worked. Try clicking on the (question mark) icon below and it should redirect you to their site.

We're ok.
I drove across this bridge yesterday though...