{"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":"2026-10-17T05:35:58.500035+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":"1510091","name":"No 1 Surface"},"operator":{"type":"operator","id":"P05062","name":"Arthur Coal Company Inc"},"controller":{"type":"controller","id":"C01827","name":"Arthur Capital Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00732","name":"Hamner Keith"},"object":{"type":"mine","id":"1510091","name":"No 1 Surface"},"validFrom":"1976-05-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510091|C00732|1976-05-14|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03483","name":"Greenbriar Coal Corp Inc"},"object":{"type":"mine","id":"1510091","name":"No 1 Surface"},"validFrom":"1976-09-01","validTo":"1977-04-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510091|P03483|1976-09-01|1977-04-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00732","name":"Hamner Keith"},"object":{"type":"operator","id":"P03483","name":"Greenbriar Coal Corp Inc"},"validFrom":"1976-09-01","validTo":"1977-04-03","current":false,"derived":true,"evidenceMineId":"1510091","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510091|P03483|1976-09-01|C00732|1976-05-14|49675"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P05062","name":"Arthur Coal Company Inc"},"object":{"type":"mine","id":"1510091","name":"No 1 Surface"},"validFrom":"1977-04-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510091|P05062|1977-04-04|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01827","name":"Arthur Capital Inc"},"object":{"type":"mine","id":"1510091","name":"No 1 Surface"},"validFrom":"1977-04-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510091|C01827|1977-04-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01827","name":"Arthur Capital Inc"},"object":{"type":"operator","id":"P05062","name":"Arthur Coal Company Inc"},"validFrom":"1977-04-04","validTo":null,"current":true,"derived":true,"evidenceMineId":"1510091","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510091|P05062|1977-04-04|C01827|1977-04-04|56348"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1510091","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}