Yep, VERY problematic.
I’ve heard from a participant, principal engineer that the Hoover Dam had a safety factor of 10.
They wanted to be able to build more damns over the years....
With no intention of a relevant comment to this failure I will say that I have found great difficulty in getting people to understand where risk and what level of it is appropriate. I have been accused of double mindedness for not being consistent in risk or safety factor application for what to some people seem to be identical circumstances when they are not. It all depends and as principal engineer in the absence of design standards someone has to decide and be prepared to take the consequences.
I've never seen test results of the concrete at the Hoover but assuming it to be reasonable, from a design perspective the safety factor is far higher than 10....