{"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":"1510066","name":"No 1 Surface Mine"},"operator":{"type":"operator","id":"P06299","name":"Makilba Mining Company Inc"},"controller":{"type":"controller","id":"C07264","name":"Baker Glenn"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05794","name":"Thompson James C"},"object":{"type":"mine","id":"1510066","name":"No 1 Surface Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510066|C05794|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07264","name":"Baker Glenn"},"object":{"type":"mine","id":"1510066","name":"No 1 Surface Mine"},"validFrom":"1976-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510066|C07264|1976-03-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02842","name":"Diamond Fork Coal Company"},"object":{"type":"mine","id":"1510066","name":"No 1 Surface Mine"},"validFrom":"1976-10-28","validTo":"1979-03-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510066|P02842|1976-10-28|1979-03-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05794","name":"Thompson James C"},"object":{"type":"operator","id":"P02842","name":"Diamond Fork Coal Company"},"validFrom":"1976-10-28","validTo":"1979-03-04","current":false,"derived":true,"evidenceMineId":"1510066","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510066|P02842|1976-10-28|C05794|1950-01-01|69868"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06299","name":"Makilba Mining Company Inc"},"object":{"type":"mine","id":"1510066","name":"No 1 Surface Mine"},"validFrom":"1979-03-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510066|P06299|1979-03-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07264","name":"Baker Glenn"},"object":{"type":"operator","id":"P06299","name":"Makilba Mining Company Inc"},"validFrom":"1979-03-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"1510066","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510066|P06299|1979-03-05|C07264|1976-03-01|74235"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1510066","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"}}