I once had my arm twisted to finish a grading job the original contractor refused to finish. I knew something was wrong when I pulled up on the job. Unloaded my dozer and asked the superintendent where the 'benchmark' was. Got a few shots off the installed sewer and buildings already under construction and things just weren't right. Asked for a complete set of plans and I found what I was looking for....an elevation given in the bottom of a manhole in the middle of the city street. Checked it against the benchmark that I was told to use and found it was almost 40 inches to high....the previous contractor and superintendent had been using the wrong 'spike' in the wrong 'tree'. I found evidence of the original correct benchmark in another tree and checked it against the sewer elevation. I called the owners and explained what I had found and that that mistake was the reason for the small fortune they had spent for grading that 'cost plus' job. They fired the superintendent on the spot over the phone and sued the former contractor.
I did several grading jobs for them after that at what ever I charged, no questions asked.
That shit's expensive. My former boss had to buy a $500k house because one of the engineers didn't do enough deed research to know there was a permanent utility esmt runnning through the middle of the lot. So he now own a huge house that he can only rent. Never sell.
I just got my insurance bill for E&O insurance (event we make a mistake, like malpractice). Geez! I got the least amount so I'm gonna beat the crap out of him if he makes an error that costs $1,000,001.

(I do like going to different cities and especially when it's raining noticing the parking lots pooling water. We try to guess whether they just did a shitty job or used the wrong elevation during staking. (we are boring

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