US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 434 — COAL MINING POINT SOURCE CATEGORY BPT, BAT, BCT LIMITATIONS AND NEW SOURCE PERFORMANCE STANDARDSSubpart E — Post-Mining Areas434.5040 C.F.R. § 434.50Applicability.Last amended: 2016Year: 2026Length: 30 wordsOfficial source Cite as 40 C.F.R. § 434.50 (2026)The provisions of this subpart are applicable to discharges from post-mining areas, except as provided in subpart H—Western Alkaline Coal Mining of this part. [67 FR 3406, Jan. 23, 2002]Next40 C.F.R. § 434.52