{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4601535","name":"Keystone #2","status":"Abandoned","status_date":"1992-11-12","mine_type":"Underground","coal_metal":"C","commodity":"Coal (Bituminous)","state":"WV","county":"Wyoming","nearest_town":"Herndon","operator_id":"P21273","operator_name":"Panther Colliers Inc","controller_id":"C03960","controller_name":"Ernest E  Varney","district":"C04","office":"Beckley District","employees":0,"latitude":37.505277,"longitude":-81.341666},"coverage":{"contributingSources":3,"registeredSources":20,"sourceRows":7},"relationships":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"4601535","name":"Keystone #2"},"operator":{"type":"operator","id":"P21273","name":"Panther Colliers Inc"},"controller":{"type":"controller","id":"C03960","name":"Ernest E  Varney"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00481","name":"Kennie Ray  Childers"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|C00481|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01037","name":"Eastern Associated Coal Corp"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1950-01-01","validTo":"1986-08-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P01037|1950-01-01|1986-08-20"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00880","name":"Eastern Gas & Fuel Association"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|C00880|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00880","name":"Eastern Gas & Fuel Association"},"object":{"type":"operator","id":"P01037","name":"Eastern Associated Coal Corp"},"validFrom":"1950-01-01","validTo":"1986-08-20","current":false,"derived":true,"evidenceMineId":"4601535","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P01037|1950-01-01|C00880|1950-01-01|50762"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00746","name":"Genoa Coal Company Inc"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1986-08-21","validTo":"1987-09-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P00746|1986-08-21|1987-09-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00481","name":"Kennie Ray  Childers"},"object":{"type":"operator","id":"P00746","name":"Genoa Coal Company Inc"},"validFrom":"1986-08-21","validTo":"1987-09-10","current":false,"derived":true,"evidenceMineId":"4601535","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P00746|1986-08-21|C00481|1950-01-01|47480"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19033","name":"Benafuels Inc"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1987-09-11","validTo":"1990-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P19033|1987-09-11|1990-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12678","name":"Bruce R  Davis"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1987-09-11","validTo":"1990-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|C12678|1987-09-11|1990-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12678","name":"Bruce R  Davis"},"object":{"type":"operator","id":"P19033","name":"Benafuels Inc"},"validFrom":"1987-09-11","validTo":"1990-09-30","current":false,"derived":true,"evidenceMineId":"4601535","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P19033|1987-09-11|C12678|1987-09-11|87646"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21185","name":"Herndon Enterprises Inc"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1990-10-01","validTo":"1991-01-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P21185|1990-10-01|1991-01-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14261","name":"Wallen David"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1990-10-01","validTo":"1991-01-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|C14261|1990-10-01|1991-01-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14261","name":"Wallen David"},"object":{"type":"operator","id":"P21185","name":"Herndon Enterprises Inc"},"validFrom":"1990-10-01","validTo":"1991-01-14","current":false,"derived":true,"evidenceMineId":"4601535","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P21185|1990-10-01|C14261|1990-10-01|92361"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21273","name":"Panther Colliers Inc"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1991-01-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P21273|1991-01-15|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03960","name":"Ernest E  Varney et al"},"object":{"type":"mine","id":"4601535","name":"Keystone #2"},"validFrom":"1991-01-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|C03960|1991-01-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03960","name":"Ernest E  Varney et al"},"object":{"type":"operator","id":"P21273","name":"Panther Colliers Inc"},"validFrom":"1991-01-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"4601535","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601535|P21273|1991-01-15|C03960|1991-01-15|64334"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"1992-11-12","lastDate":"1992-11-12","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":5,"firstDate":"1950-01-01","lastDate":"1991-01-15","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":4},"periods":{},"recentRecords":[]},{"id":"msha-mines","name":"Mines","domains":["identity","production","logistics"],"products":["mine identity","status","commodity","location","operator and controller"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{},"recentRecords":[]}],"safety":{"href":"/api/v1/mines/4601535/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4601535/silica","description":"Dedicated silica records, measurements, sample status and trends. Defaults to the snapshot year; use year=all for history."},"externalContext":{"eia":null,"title30":{"snapshot":{"chapterCount":6,"featuredSectionCount":100,"latestAmendedOn":"2026-08-14","latestIssueDate":"2026-08-14","partCount":206,"sectionCount":5954,"upToDateAsOf":"2026-08-19"},"regulations":[],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"4601535","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}