​This is the third and final article in a series on the U.S. Environmental Protection Agency’s §316(b) rule on limiting the harmful impacts on aquatic organisms — fish, shellfish, larvae, and eggs — caused by cooling water intake structures (CWIS). Thefirst article provided details on the rule itself, and the second articlediscussed generation and transmission (G&T) electric cooperatives’ views on compliance options and challenges posed by the rule. This article reviews the technology options for compliance, with a focus on modified traveling water screens and fish diversion technologies.