(12-18-2019 04:09 PM)georgewebb Wrote:  These are interesting questions.
Assume that both the Corps and the developers knew that the dam would cause the land to flood in the event of a big storm.

Nobody does. That’s a bad assumption. At least as far as knowing what land. I worked with flood plain maps in the late 1970s. I bought my first house and moved out of an apartment in 1979. When I started looking, I ruled out anything behind, or immediately below, either Addicks or Barker.

By the time data can be gathered and processed to create a new flood map, it’s already out of date. And nobody knows how to fix that.