An evaluation of floodflow characteristics at the proposed bridge site revealed that:
1.The design-flood discharge for the proposed bridge site would be 18,200 cubic feet per second (515 cubic metres per second), which is about equal to the discharge for the 100-year flood.
2.The elevation at the bridge site for the flood of October 2, 1945, was 411.8 feet (125.5 metres).
3.Alternate-bridge designs 1 and 2 would cause 0.2 foot (0.06 metre) increase in water level.