I don't know if it was the last time, but from the AP and WTOP News:
"Dave Koch, a spokesman for the Cedar Rapids fire department, said the river will crest Friday at about 31.8 feet. It was at 30.9 feet early in the morning. In a 1993 flood, considered the worst flood in recent history, it was at 19.27 feet."
Iowa has had major floods often but it rarely is the lead story in a flooding event across that region.
Usually Ohio and Michigan seem to claim that title when talking on flooding in that region of the country.
Rivers do flood though and we always seem to feel blindsided by them when then occur, unlike hurricanes that can be tracked or twister outbreaks that get news.
Lots of comparisons to the floods of 1993 with the current flooding event. I read elsewhere that the weather patterns that supported this flooding event matched pretty well with those found with the 1993 event. Fortunately, it also did suggest that the end of the prime flooding pattern (not necessarily all rainfall, though) should soon draw to a close.