https://19january2021snapshot.epa.gov/sc-mining/july-2011-memorandum-improving-epa-review-appalachian-surface-coal-mining-operations-under_.html monthly 1.00 https://19january2021snapshot.epa.gov/sc-mining/programmatic-environmental-impact-statement-eis-mountaintop-miningvalley-fill-appalachia_.html monthly 0.80 https://19january2021snapshot.epa.gov/sc-mining/basic-information-about-surface-coal-mining-appalachia_.html monthly 0.80 https://19january2021snapshot.epa.gov/sc-mining/federal-and-state-resources-about-surface-coal-mining-appalachia_.html monthly 0.80 https://19january2021snapshot.epa.gov/sc-mining/june-2009-memorandum-understanding-among-army-department-interior-and-epa-implementing_.html monthly 0.80 https://19january2021snapshot.epa.gov/sc-mining/what-epa-doing-reduce-adverse-impacts-surface-coal-mining-appalachia_.html monthly 0.80 https://19january2021snapshot.epa.gov/sc-mining/forms/contact-us-about-surface-coal-mining-appalachia_.html monthly 0.80