{"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":"1507125","name":"Pikeville No 1 Dock"},"operator":{"type":"operator","id":"P04708","name":"Alma Coal Corp"},"controller":{"type":"controller","id":"C03885","name":"Johnson R B"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01305","name":"Peter Fork Mining Company"},"object":{"type":"mine","id":"1507125","name":"Pikeville No 1 Dock"},"validFrom":"1974-01-01","validTo":"1977-01-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507125|P01305|1974-01-01|1977-01-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01106","name":"Robert C  Billips"},"object":{"type":"mine","id":"1507125","name":"Pikeville No 1 Dock"},"validFrom":"1974-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507125|C01106|1974-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01106","name":"Robert C  Billips"},"object":{"type":"operator","id":"P01305","name":"Peter Fork Mining Company"},"validFrom":"1974-01-01","validTo":"1977-01-16","current":false,"derived":true,"evidenceMineId":"1507125","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507125|P01305|1974-01-01|C01106|1974-01-01|52355"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03885","name":"Johnson R B"},"object":{"type":"mine","id":"1507125","name":"Pikeville No 1 Dock"},"validFrom":"1976-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507125|C03885|1976-12-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04708","name":"Alma Coal Corp"},"object":{"type":"mine","id":"1507125","name":"Pikeville No 1 Dock"},"validFrom":"1977-01-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507125|P04708|1977-01-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03885","name":"Johnson R B"},"object":{"type":"operator","id":"P04708","name":"Alma Coal Corp"},"validFrom":"1977-01-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"1507125","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507125|P04708|1977-01-17|C03885|1976-12-01|64141"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1507125","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"}}