{"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":"1510342","name":"Hamco Strip"},"operator":{"type":"operator","id":"P02069","name":"Pennyrile Coal Company Inc"},"controller":{"type":"controller","id":"C03886","name":"English Coal Company Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03571","name":"Ham Ray A & John B"},"object":{"type":"mine","id":"1510342","name":"Hamco Strip"},"validFrom":"1976-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510342|C03571|1976-05-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04345","name":"Hamco Coal Company"},"object":{"type":"mine","id":"1510342","name":"Hamco Strip"},"validFrom":"1977-04-01","validTo":"1978-02-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510342|P04345|1977-04-01|1978-02-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03571","name":"Ham Ray A & John B"},"object":{"type":"operator","id":"P04345","name":"Hamco Coal Company"},"validFrom":"1977-04-01","validTo":"1978-02-09","current":false,"derived":true,"evidenceMineId":"1510342","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510342|P04345|1977-04-01|C03571|1976-05-01|63259"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02069","name":"Pennyrile Coal Company Inc"},"object":{"type":"mine","id":"1510342","name":"Hamco Strip"},"validFrom":"1978-02-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510342|P02069|1978-02-10|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03886","name":"English Coal Company Inc"},"object":{"type":"mine","id":"1510342","name":"Hamco Strip"},"validFrom":"1978-02-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510342|C03886|1978-02-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03886","name":"English Coal Company Inc"},"object":{"type":"operator","id":"P02069","name":"Pennyrile Coal Company Inc"},"validFrom":"1978-02-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"1510342","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510342|P02069|1978-02-10|C03886|1978-02-10|64148"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1510342","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"}}