That tower is a cell site next to Dist #1 Fire Station. It is across the street from that. Grand Mound is in Thurston County, Centralia is Lewis County, not sure why they list this as such. It is a large building for the hotel, probably 5-6 stories and the additional water park building. If you stay there at $300 a night, you go go swimming. The locals are not happy with that arrangement.
It is a low level repeater, I could hear it as far south as Centralia, 6-7 miles and north as far as the northbound rest stop. There probably is not a recent sat photo as it was constructed in the last year. There is a big box further south which is the Michaels arts and craft store distribution center for the NW which has it's own set of freqs.