Cache Is Not At Posted Coordinates
The final location of this cache can be obtained upon completing both the GEOregon GeoArt adventure lab "OR #50: Oregon: Where It All Began Block Party" and lab "OR #75: GEOregon Geo-Art Fun Facts", which can be accessed from either northbound or southbound rest area parking. Coordinates of this and an additional container reachable from the southbound rest area (GCB9QJY) will be revealed upon completing both of those adventure labs.
As with all caches in public areas, be stealthy and watch out for muggles. Please replace the container as you found it, thanks!
A gift card awaits the first finder of this bonus.