Well, I can't find the thread, but last fall I was faced with a dire lawn situation: The dreaded Poa annua! thought I got it all, but there were a few lighter green splotches in the bluegrass. But they could have been the new grass I planted after ripping the Poa out. Only way to tell was to wait for spring and see what was growing in the dozen or so spots.
I marked them with Magnails in colored tape; pushed them into the ground at the spots. That's when I turned the endeavor into a training exercise...never having recorded points and later staked them out before.
So I did so before the snow flew. Saved them in a file. Not wanting to cheat this spring after the snow melts I thought the best way to do it "honestly" was to stake them out, wait for the snow to melt, then see how close I came. 
My Rod-Girl is in Wisconsin this weekend, so I had to do a lot of walking ("Out .2' Left .4'....In .1' Right .1", etc.). I can really appreciate why robots are must-have tool for this job lol.
I was curious though, why the DC asked me to save the points. Is this the difference between "design" and "as-built" I've seen referenced frequently? Do you save stake out points to later prove that the contractor drove over them with the excavator and then tried to put them back where they go?
Stay tuned for the next exciting episode (after the snow melts)...:-D
I always store the staked location, especially with Tpost or whatever set along boundaries and making your task a part of the raw data.
When a crew comes back with no proof of where they set anything, there is no quality control.
When it comes to liability, that assurance in the IMan's "yea we got er done" don't go very far.
BTW, thru many Imen and their shortcuts thru the years, I have found out that it still don't cure stupidity, like raw data will show what you entered even if the TS is not setting on the number entered or backsited the number entered.
To make that assurance, stake to the BS and store that shot first, then do the stakeout and raw data will record the whole event.
B-)
My current employer also uses this stored stake out point for the elevation, because they do cut sheets in the office, instead of in the field as I have seen done in the past
