{"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":"4404176","name":"No 1 Strip Mine"},"operator":{"type":"operator","id":"P01976","name":"Black Creek Coal Company"},"controller":{"type":"controller","id":"C01666","name":"Trent Phillip L"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01975","name":"Humphreys Enterprises Inc"},"object":{"type":"mine","id":"4404176","name":"No 1 Strip Mine"},"validFrom":"1975-01-01","validTo":"1976-05-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404176|P01975|1975-01-01|1976-05-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01665","name":"William D  Humphreys et al"},"object":{"type":"mine","id":"4404176","name":"No 1 Strip Mine"},"validFrom":"1975-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404176|C01665|1975-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01665","name":"William D  Humphreys et al"},"object":{"type":"operator","id":"P01975","name":"Humphreys Enterprises Inc"},"validFrom":"1975-01-01","validTo":"1976-05-03","current":false,"derived":true,"evidenceMineId":"4404176","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404176|P01975|1975-01-01|C01665|1975-01-01|55541"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01976","name":"Black Creek Coal Company"},"object":{"type":"mine","id":"4404176","name":"No 1 Strip Mine"},"validFrom":"1976-05-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404176|P01976|1976-05-04|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01666","name":"Trent Phillip L"},"object":{"type":"mine","id":"4404176","name":"No 1 Strip Mine"},"validFrom":"1976-05-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404176|C01666|1976-05-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01666","name":"Trent Phillip L"},"object":{"type":"operator","id":"P01976","name":"Black Creek Coal Company"},"validFrom":"1976-05-04","validTo":null,"current":true,"derived":true,"evidenceMineId":"4404176","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404176|P01976|1976-05-04|C01666|1976-05-04|55561"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4404176","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"}}