Peabody Twentymile Mining v. Secretary of Labor

**What Happened** Peabody Twentymile Mining, a coal company, received a safety citation from federal regulators for how they sealed air ventilation passages in their mine. The company used polyurethane foam to seal these passages, which control airflow underground. Government inspectors said this method violated federal mining safety rules and issued a citation against the company. **What the Court Decided** The Tenth Circuit Court of Appeals sided with Peabody Twentymile Mining. The court reversed the citation, ruling that the company's polyurethane foam sealing method was actually an accepted traditional practice under federal mining regulations. The judges found the safety regulation's language was clear and that the company's method met the legal requirements. **Why This Matters for Workers** This ruling affects safety standards in coal mines. While the company won, it doesn't necessarily mean worker safety was compromised—the court determined the sealing method met safety requirements. However, workers should stay informed about how safety regulations are interpreted, as these decisions can influence which safety practices are considered acceptable. Mine workers should continue reporting safety concerns through proper channels regardless of how regulations are interpreted by courts.