Have you found any tax tokens or the buggy token from the Geneological Society? (I think it was an old Parking Validation Token, available through about 1995).
SLC has so much cool history in the area. One of the places I've often wanted to go detect is the Grantsville area There's one old Church there, that is now a private residence. Brigham Young spoke there several times. Definitely an 1800's area!
Cheers,
Skippy