{"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":"4607095","name":"#1 Strip"},"operator":{"type":"operator","id":"P18224","name":"Craddock & Son Coal Company Inc"},"controller":{"type":"controller","id":"C00467","name":"Craddock Robert L & Robert P"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00467","name":"Craddock Robert L & Robert P"},"object":{"type":"mine","id":"4607095","name":"#1 Strip"},"validFrom":"1974-10-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4607095|C00467|1974-10-10|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17768","name":"Tri-County Mining Inc"},"object":{"type":"mine","id":"4607095","name":"#1 Strip"},"validFrom":"1986-04-01","validTo":"1986-05-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4607095|P17768|1986-04-01|1986-05-29"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12458","name":"Meredith Chester"},"object":{"type":"mine","id":"4607095","name":"#1 Strip"},"validFrom":"1986-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4607095|C12458|1986-04-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12458","name":"Meredith Chester"},"object":{"type":"operator","id":"P17768","name":"Tri-County Mining Inc"},"validFrom":"1986-04-01","validTo":"1986-05-29","current":false,"derived":true,"evidenceMineId":"4607095","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4607095|P17768|1986-04-01|C12458|1986-04-01|86921"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18224","name":"Craddock & Son Coal Company Inc"},"object":{"type":"mine","id":"4607095","name":"#1 Strip"},"validFrom":"1986-05-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4607095|P18224|1986-05-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00467","name":"Craddock Robert L & Robert P"},"object":{"type":"operator","id":"P18224","name":"Craddock & Son Coal Company Inc"},"validFrom":"1986-05-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"4607095","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4607095|P18224|1986-05-30|C00467|1974-10-10|47383"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4607095","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"}}