{"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":"2026-10-13T11:19:05.459773+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":"1503120","name":"No Ie-68"},"operator":{"type":"operator","id":"P12560","name":"Four H Coal Company Inc"},"controller":{"type":"controller","id":"C02189","name":"Hamilton J Byron"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00059","name":"Ligon Preparation Company"},"object":{"type":"mine","id":"1503120","name":"No Ie-68"},"validFrom":"1950-01-01","validTo":"1981-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P00059|1950-01-01|1981-09-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00027","name":"Hall Hargis"},"object":{"type":"mine","id":"1503120","name":"No Ie-68"},"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":"1503120|C00027|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00027","name":"Hall Hargis"},"object":{"type":"operator","id":"P00059","name":"Ligon Preparation Company"},"validFrom":"1950-01-01","validTo":"1981-09-21","current":false,"derived":true,"evidenceMineId":"1503120","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P00059|1950-01-01|C00027|1950-01-01|43661"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P12560","name":"Four H Coal Company Inc"},"object":{"type":"mine","id":"1503120","name":"No Ie-68"},"validFrom":"1981-09-22","validTo":"1982-02-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P12560|1981-09-22|1982-02-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02189","name":"Hamilton J Byron"},"object":{"type":"mine","id":"1503120","name":"No Ie-68"},"validFrom":"1981-09-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|C02189|1981-09-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02189","name":"Hamilton J Byron"},"object":{"type":"operator","id":"P12560","name":"Four H Coal Company Inc"},"validFrom":"1981-09-22","validTo":"1982-02-03","current":false,"derived":true,"evidenceMineId":"1503120","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P12560|1981-09-22|C02189|1981-09-22|57749"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P12992","name":"Newsome Coal Company"},"object":{"type":"mine","id":"1503120","name":"No Ie-68"},"validFrom":"1982-02-04","validTo":"1983-01-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P12992|1982-02-04|1983-01-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C09554","name":"Newsome Donald--Allard G & Darling"},"object":{"type":"mine","id":"1503120","name":"No Ie-68"},"validFrom":"1982-02-04","validTo":"1983-01-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|C09554|1982-02-04|1983-01-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C09554","name":"Newsome Donald--Allard G & Darling"},"object":{"type":"operator","id":"P12992","name":"Newsome Coal Company"},"validFrom":"1982-02-04","validTo":"1983-01-25","current":false,"derived":true,"evidenceMineId":"1503120","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P12992|1982-02-04|C09554|1982-02-04|79979"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P12560","name":"Four H Coal Company Inc"},"object":{"type":"mine","id":"1503120","name":"No Ie-68"},"validFrom":"1983-01-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P12560|1983-01-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02189","name":"Hamilton J Byron"},"object":{"type":"operator","id":"P12560","name":"Four H Coal Company Inc"},"validFrom":"1983-01-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"1503120","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1503120|P12560|1983-01-26|C02189|1981-09-22|57750"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1503120","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}