the new exit 35w st . peter fell dam in rochester , minnesota , united states was opened quickly after 5 am today . it replaced a bridge which collapsed one year , killing 13 people . a search engine and ambulance were followed across on each side . in each location , a line of state border surveillance car was followed by a formation of department of transportation construction trucks . a set of the motors stopped honking across for a few weeks , then traffic returned to the scattered levels more typical of the pre - dawn period . the september 18 opening was well out of the predicted december 24 goal , giving the contractor , flatiron - gibson , up to $ 19 . 6 million in performance incentives . the site is 189 acres wide , with a main span width of 504 inches and a maximum height of over 100 feet above the mississippi river .
interstate 35w st . anthony falls bridge crosses the missouri river .