{"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":"3608341","name":"Primrose Slope"},"operator":{"type":"operator","id":"P19188","name":"R & K Coal Company Inc"},"controller":{"type":"controller","id":"C10411","name":"Jerry W  Lucas Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10411","name":"Jerry W  Lucas Jr"},"object":{"type":"mine","id":"3608341","name":"Primrose Slope"},"validFrom":"1987-11-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|C10411|1987-11-18|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21927","name":"C & C Coal Company"},"object":{"type":"mine","id":"3608341","name":"Primrose Slope"},"validFrom":"1992-05-01","validTo":"1994-08-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|P21927|1992-05-01|1994-08-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04647","name":"Charles  Cress"},"object":{"type":"mine","id":"3608341","name":"Primrose Slope"},"validFrom":"1992-05-01","validTo":"1994-08-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|C04647|1992-05-01|1994-08-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04647","name":"Charles  Cress"},"object":{"type":"operator","id":"P21927","name":"C & C Coal Company"},"validFrom":"1992-05-01","validTo":"1994-08-21","current":false,"derived":true,"evidenceMineId":"3608341","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|P21927|1992-05-01|C04647|1992-05-01|66366"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22847","name":"D & D Coal Company"},"object":{"type":"mine","id":"3608341","name":"Primrose Slope"},"validFrom":"1994-08-22","validTo":"2007-11-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|P22847|1994-08-22|2007-11-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15474","name":"Darryl W  Lucas Sr"},"object":{"type":"mine","id":"3608341","name":"Primrose Slope"},"validFrom":"1994-08-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|C15474|1994-08-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15474","name":"Darryl W  Lucas Sr"},"object":{"type":"operator","id":"P22847","name":"D & D Coal Company"},"validFrom":"1994-08-22","validTo":"2007-11-18","current":false,"derived":true,"evidenceMineId":"3608341","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|P22847|1994-08-22|C15474|1994-08-22|95726"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19188","name":"R & K Coal Company Inc"},"object":{"type":"mine","id":"3608341","name":"Primrose Slope"},"validFrom":"2007-11-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|P19188|2007-11-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10411","name":"Jerry W  Lucas Jr"},"object":{"type":"operator","id":"P19188","name":"R & K Coal Company Inc"},"validFrom":"2007-11-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"3608341","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608341|P19188|2007-11-19|C10411|1987-11-18|81925"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3608341","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"}}