Can this floor be salvaged?

[striderllc]

Hello!

I hope everyone on this forum is doing well. I just found this forum and wanted to connect because I am trying to figure out what is going on with my wood floor. I recently noticed many of the nails in the wood floor are developing a black stain. Based on the discussion, I think my issue might be the same as Indy Ryan but I can't open his pictures to verify. I've attached a few photos hoping someone could confirm. I'm concerned that if I don't do anything, the stain continues to spread even more and starts to develop around other nails. I'd appreciate if someone could provide some ideas to remedy my issue. All the best!

 

[JoeD]

Looks like signs of water damage.

 

[nealtw]

I have seen a flooring guy replace the top 1/8 of the floor boards like that and make all that look like new. he just routered out one board at the time

 

[ITypiRTh]

An excellent way to repair it on the video, it is unfortunate that I did not know this 3 years ago. In my basement, there were problems with waterproofing the floor, it looked a little worse than yours and I had to change half of all the boards on the floor. Now I understand that a point replacement was enough.