Last Monday, in a comprehensive, 189-page opinion, Judge Rodney Sippel ruled that Ameren Missouri had violated EPA’s PSD regulations by failing to get permits for upgrades in 2007 and 2010 at its Rush Island facility. 
As I noted when Judge Sippel denied cross-motions for summary judgment, the result is not really a surprise.
Moreover, Judge Sippel’s decision is not based on any extreme reading of the law. … More
Given EPA’s recent run of defeats in its NSR enforcement initiative, it’s probably breathing a sigh of relief over last week’s decision in United States v. Ameren Missouri, regarding Ameren’s Rush Island coal-fired power plant. 
True, the court denied EPA’s motions for summary judgment. However, it also denied Ameren’s motions and on balance probably left EPA feeling better than Ameren about its prospects at trial. … More