{"data":{"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":"2026-10-18T09:31:49.615908+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":"1518507","name":"Mine #8"},"operator":{"type":"operator","id":"0051027","name":"Enterprise Mining Company LLC"},"controller":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C16016","name":"Progress Energy Inc"},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2000-11-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|C16016|2000-11-30|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24577","name":"Diamond May Coal, Inc."},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2002-01-28","validTo":"2002-04-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|P24577|2002-01-28|2002-04-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C16016","name":"Progress Energy Inc"},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2002-01-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|C16016|2002-01-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C16016","name":"Progress Energy Inc"},"object":{"type":"operator","id":"P24577","name":"Diamond May Coal, Inc."},"validFrom":"2002-01-28","validTo":"2002-04-11","current":false,"derived":true,"evidenceMineId":"1518507","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|P24577|2002-01-28|C16016|2002-01-28|98070"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24571","name":"Kentucky May Mining"},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2002-04-12","validTo":"2003-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|P24571|2002-04-12|2003-11-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C16016","name":"Progress Energy Inc"},"object":{"type":"operator","id":"P24571","name":"Kentucky May Mining"},"validFrom":"2002-04-12","validTo":"2003-11-13","current":false,"derived":true,"evidenceMineId":"1518507","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|P24571|2002-04-12|C16016|2000-11-30|98055"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041395","name":"Amfire LLC"},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2003-01-31","validTo":"2003-01-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|0041395|2003-01-31|2003-01-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2003-02-01","validTo":"2016-07-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|0041211|2003-02-01|2016-07-25"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24577","name":"Diamond May Coal Co Inc"},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2003-11-14","validTo":"2006-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|P24577|2003-11-14|2006-04-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C16016","name":"Progress Energy Inc"},"object":{"type":"operator","id":"P24577","name":"Diamond May Coal Co Inc"},"validFrom":"2003-11-14","validTo":"2006-04-30","current":false,"derived":true,"evidenceMineId":"1518507","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|P24577|2003-11-14|C16016|2002-01-28|98071"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051027","name":"Enterprise Mining Company LLC"},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2006-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|0051027|2006-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"0051027","name":"Enterprise Mining Company LLC"},"validFrom":"2006-05-01","validTo":"2016-07-25","current":false,"derived":true,"evidenceMineId":"1518507","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|0051027|2006-05-01|0041211|2003-02-01|1643"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041395","name":"Amfire LLC"},"object":{"type":"operator","id":"0051027","name":"Enterprise Mining Company LLC"},"validFrom":"2006-05-01","validTo":"2003-01-31","current":false,"derived":true,"evidenceMineId":"1518507","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|0051027|2006-05-01|0041395|2003-01-31|2555"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"mine","id":"1518507","name":"Mine #8"},"validFrom":"2016-07-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|0127923|2016-07-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"operator","id":"0051027","name":"Enterprise Mining Company LLC"},"validFrom":"2016-07-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"1518507","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1518507|0051027|2006-05-01|0127923|2016-07-26|25431"}}],"coverage":{"historyRecords":6,"edgeCount":15,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1518507","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}