{"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":"1517668","name":"Black Hawk Mining Inc"},"operator":{"type":"operator","id":"P22873","name":"Black Hawk Mining Inc"},"controller":{"type":"controller","id":"C13335","name":"Michael T  McCullough"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13335","name":"Michael T  McCullough"},"object":{"type":"mine","id":"1517668","name":"Black Hawk Mining Inc"},"validFrom":"1994-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517668|C13335|1994-06-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22873","name":"Black Hawk Mining Inc"},"object":{"type":"mine","id":"1517668","name":"Black Hawk Mining Inc"},"validFrom":"1995-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517668|P22873|1995-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13335","name":"Michael T  McCullough"},"object":{"type":"operator","id":"P22873","name":"Black Hawk Mining Inc"},"validFrom":"1995-05-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1517668","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517668|P22873|1995-05-01|C13335|1994-06-01|89249"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1517668","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"}}