Well, for those keeping score at home this makes at least two truss bridges in Missouri destroyed by the storm. Hopefully this will be it. At least one modern (ie post 1970) steel stringer was destroyed, so it's not just trust bridges that are susceptible to flooding.
Here is a news article on destruction of this bridge by flooding. http://www.ktts.com/news/local-news/bridges-gone-after-flood...
We are going to get 3 to 5 more inches of rain here in the St Louis area by Friday morning. So more bridges could get taken out.