content: Hubris. The engineers knew what would happen to them because they had evidence of the destructive forces from countless outdoor infrastructure installations that have shown the problems before. The hubris came from the push to rush these "green" energy machines out and the engineering compromise the engineers made to be "good enough" and still be on time and on budget. It takes a lot of arrogance from a lot of people on a project to arrive where we are now. This is common in all engineered items from turbines to cars to software to bridges. We no longer over-engineer what we build due to cost and being "clever". We simply apply as many hacks to the problem as we can to keep the initial cost down while punting the real costs down the road. I cannot think of one modern engineering project that does not suffer from this in some manner. It's going to take some big changes to get back to over-engineering for durability and reliability and the money men won't want to go there without a payoff. I don't see things changing any time soon.