Awesome job, SCFarms!
What did the pond lack that caused the initial failure? Was it just incorrect compaction?
Regardless, what steps did you take to build the successful v. 2.0 of your pond?
It does look like it is in a small waterway. Is it filling with surface water, or are you filling/supplementing from a well?
Good luck on your pond development! I suspect your grandad will be very proud to have his dream realized for his great grandsons.