Old Man's Team

Just getting around to logging my finds (10-29). I took a 11,446 mile tour of this beautiful country of ours. Went through 32 states, and visited 17 national parks or memorials plus. I took a pic of a benchmark but I can't locate it through geocaching and I can't remember for sure where it was, I think in Yellowstone NP near a pond. It was a US Coast Guard Geodetic Survey marker with 8413.920 and K12 /1923. Can antone help me ? Thanks regerrish@msn.com