[Az-Geocaching] Bench Mark or not?

While doing some maintenance on a cache for a friend of mine I found
this mark that I thought was a "Bench Mark", I guess not. It was placed
by the U.S. Dept. of the Interior - Bur. of Land Management. The
marking on it seems to be "T14NR2W" below that is "1/4" and below that
is S8 | S9 so I guess I have NOT found a bench mark. Oh well...

Bob Smith, Prescott