[Paladin2]

No reason given that I saw, but I assume that avoidance of building and tearing down a temporary dam could result in faster constructions time, lower expense and less disruption to river traffic.

Obviously in this case, their technology failed to deliver.

[RobbyS]

Had this ever been done before? If not, the Ohio is a mighty big river to play with. God, why does the corps keep digging these money pits?