The bridge you will see at ground zero has been rebuilt numerous times because of destruction from ice-flows. This bridge is far superior to any other ones. Take a moment to read the many plaques and historic information while you are here getting the geocache.
This is a standard cache - shouldn't be hard to find as we've made ground zero away from many of the obvious hosts.
Surprisingly Riverton was lacking in geocaches since all previous ones were archived over the last year or so. By the time this is published there will now be at least 3 opportunities to get a smiley in Riverton including the Adventure Lab stop just down the walkway.