I finally did the promised update. This was done with the new version of SketchUp, and I lost the edge lines in the model -- for the life of me I could not figure out how to get them back. Maybe cause I added all these colors and textures to the model (?). Note that the base of the flagpole has a nice aqua patina (you gotta look really close!).
The revised SketchUp .kmz file for the Rivers Site is here.