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Arch Coal Inc.https://pcaobus.org/form-ap-filings/33394/33394Arch Coal Inc.333942/22/2019 11:28:42 AM2018f85fe710-20d4-4854-b1d4-141b2bc31add42Ernst & Young LLP85987Arch Coal Inc.1037676ACIIQ; 7159B; 7160B; 7161B; ARCH0004202590David Christopher Rogan0004202590True
Arch Coal Inc.https://pcaobus.org/form-ap-filings/17967/17967Arch Coal Inc.179673/9/2018 12:19:26 PM2017fdcd7721-df69-4190-9326-0522819c7f7d42Ernst & Young LLP85987Arch Coal Inc.1037676ACIIQ; 7159B; 7160B; 7161B; ARCH0004202590David Christopher Rogan0004202590True