Ah yes! Neat challenge! I fix these nodes if I can when I come across them. But there are some aspects that mean that fixes are not so obvious.
Sometimes the GNIS data didn’t have exactly the right coordinates for the mine or quarry, and it’s possible that the correct location isn’t readily visible in aerial imagery.
Also, the distinction between quarry and mine is sometimes not obvious. If I can, I use the MRDS to look up historical records for the location and use that data for the update. Unfortunately, data in MRDS is also often of poor quality.
As @stevea mentions, USGS Topo is another source that can be used to correct the location and type of one of these features. Which works great when it works. And then sometimes it doesn’t work so well. I find that small features like man_made=adit are best surveyed in person to get the correct location.
I also try to tag the resource and often alt_name for the mine and include the MRDS ID in ref:US:MRDS.