{"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":"2302295","name":"Liberty Portable Plant"},"operator":{"type":"operator","id":"L14846","name":"Capital Quarries Company"},"controller":{"type":"controller","id":"M02148","name":"Michael K Farmer; Elliott (Bud) E Farmer"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00774","name":"Eric S  Strope et al"},"object":{"type":"mine","id":"2302295","name":"Liberty Portable Plant"},"validFrom":"1950-01-01","validTo":"2011-04-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302295|M00774|1950-01-01|2011-04-18"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14846","name":"Capital Quarries Company"},"object":{"type":"mine","id":"2302295","name":"Liberty Portable Plant"},"validFrom":"2004-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302295|L14846|2004-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00774","name":"Eric S  Strope et al"},"object":{"type":"operator","id":"L14846","name":"Capital Quarries Company"},"validFrom":"2004-08-01","validTo":"2011-04-18","current":false,"derived":true,"evidenceMineId":"2302295","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302295|L14846|2004-08-01|M00774|1950-01-01|114736"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02148","name":"Elliott (Bud) E Farmer  et al"},"object":{"type":"mine","id":"2302295","name":"Liberty Portable Plant"},"validFrom":"2011-04-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302295|M02148|2011-04-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02148","name":"Elliott (Bud) E Farmer  et al"},"object":{"type":"operator","id":"L14846","name":"Capital Quarries Company"},"validFrom":"2011-04-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"2302295","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302295|L14846|2004-08-01|M02148|2011-04-19|124061"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02148","name":"Michael K Farmer  et al"},"object":{"type":"operator","id":"L14846","name":"Capital Quarries Company"},"validFrom":"2011-04-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"2302295","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302295|L14846|2004-08-01|M02148|2011-04-19|124062"}}],"coverage":{"historyRecords":3,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2302295","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"}}