{"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":"4000883","name":"Henry County Mines"},"operator":{"type":"operator","id":"L18158","name":"Kentucky-Tennessee Clay Company"},"controller":{"type":"controller","id":"M11763","name":"Imerys S A"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00515","name":"Kentucky-Tennessee Clay Company"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"validFrom":"1950-01-01","validTo":"1983-03-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L00515|1950-01-01|1983-03-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00435","name":"Chester  Gulick"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"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":"4000883|M00435|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00435","name":"Chester  Gulick"},"object":{"type":"operator","id":"L00515","name":"Kentucky-Tennessee Clay Company"},"validFrom":"1950-01-01","validTo":"1983-03-28","current":false,"derived":true,"evidenceMineId":"4000883","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L00515|1950-01-01|M00435|1950-01-01|110886"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06683","name":"Kentucky-Tennessee Clay Company"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"validFrom":"1983-03-29","validTo":"1986-06-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L06683|1983-03-29|1986-06-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00453","name":"Ranchers Exploration & Development Corp"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"validFrom":"1983-03-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|M00453|1983-03-29|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00453","name":"Ranchers Exploration & Development Corp"},"object":{"type":"operator","id":"L06683","name":"Kentucky-Tennessee Clay Company"},"validFrom":"1983-03-29","validTo":"1986-06-16","current":false,"derived":true,"evidenceMineId":"4000883","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L06683|1983-03-29|M00453|1983-03-29|111240"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08960","name":"Kentucky-Tennessee Clay Company"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"validFrom":"1986-06-17","validTo":"2001-03-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L08960|1986-06-17|2001-03-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00089","name":"Hecla Mining Company"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"validFrom":"1986-06-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|M00089|1986-06-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00089","name":"Hecla Mining Company"},"object":{"type":"operator","id":"L08960","name":"Kentucky-Tennessee Clay Company"},"validFrom":"1986-06-17","validTo":"2001-03-27","current":false,"derived":true,"evidenceMineId":"4000883","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L08960|1986-06-17|M00089|1986-06-17|103996"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18158","name":"Kentucky-Tennessee Clay Company"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"validFrom":"2001-03-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L18158|2001-03-28|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11763","name":"Imerys S A"},"object":{"type":"mine","id":"4000883","name":"Henry County Mines"},"validFrom":"2001-03-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|M11763|2001-03-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11763","name":"Imerys S A"},"object":{"type":"operator","id":"L18158","name":"Kentucky-Tennessee Clay Company"},"validFrom":"2001-03-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"4000883","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000883|L18158|2001-03-28|M11763|2001-03-28|152282"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4000883","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"}}