Construction began in 1989 , but work on the main tower did not begin until April 1990 . The main tower is in height from the top of the tower to the riverbed . During the Great Flood of 1993 , construction continued despite record crests on the Mississippi below . The final cost of the bridge was $ 49 million , about 16 percent over budget
Great Flood of 1993
Great Flood of 1993
Great River Bridge