In the alternate reality created by Nero's incursion into 2233, Riverside was still a small town but contained a Starfleet shipyard that could build starships up to and including the colossal Constitution-class. (ST movie & novelization: Star Trek)
In 2004, William Shatner arrived in the community, claiming that he was filming a science fiction movie in the area. In reality Shatner and the producers were playing an elaborate hoax on the residents of Riverside to gauge local reaction. These events were depicted in the SpikeTV miniseries Invasion Iowa.