This is a nice read, until you get to this part.
Ha, that's what's wrong with today's engineering. Giant tunnel machine fails due to expected soil conditions? Blah. Nature is happy with 95% success, and doesn't care if there are a few early failures. We humans used to be quite concerned about a 5% chance of death, or a billion dollars wasted.
That's why I always put in a large 'safety factor'. Now, the margins are like this guy, thin as the skin on your teeth. You look and there is not a condo alive that could survive an earthquake. Most likely, I won't be around to see the consequences of all this.
ps. at the old company, we used to find lots of 'Handyman Specials' where the margins were 'good enough'. Yuck.
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