I live in des moines. The water was taken out of the river, and put right back in to flow downstream. That is what typically happens in to water.
The did this in des moines because 80% or the power comes from wind making. Apple is building a large data center near my house. Google has one someplace as well. The large number of wind farms around the state make us a very attractive place for anyone who wants to use a lot of reporters energy.