{"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":"1516944","name":"D And L No 1"},"operator":{"type":"operator","id":"P22373","name":"D & L Mining Inc"},"controller":{"type":"controller","id":"C14859","name":"Lowe Dover"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08596","name":"Johnson Donald"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1980-11-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|C08596|1980-11-07|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21069","name":"Tempest Coal Company Inc"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1990-08-01","validTo":"1990-12-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P21069|1990-08-01|1990-12-02"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08596","name":"Johnson Donald"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1990-08-01","validTo":"1990-12-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|C08596|1990-08-01|1990-12-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08596","name":"Johnson Donald"},"object":{"type":"operator","id":"P21069","name":"Tempest Coal Company Inc"},"validFrom":"1990-08-01","validTo":"1990-12-02","current":false,"derived":true,"evidenceMineId":"1516944","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P21069|1990-08-01|C08596|1990-08-01|77726"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21251","name":"Tempest Coals Inc"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1990-12-03","validTo":"1992-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P21251|1990-12-03|1992-11-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14295","name":"Dotson Dale"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1990-12-03","validTo":"1992-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|C14295|1990-12-03|1992-11-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14295","name":"Dotson Dale"},"object":{"type":"operator","id":"P21251","name":"Tempest Coals Inc"},"validFrom":"1990-12-03","validTo":"1992-11-30","current":false,"derived":true,"evidenceMineId":"1516944","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P21251|1990-12-03|C14295|1990-12-03|92429"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21940","name":"Lamplighter Mining Company Inc"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1992-12-01","validTo":"1993-06-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P21940|1992-12-01|1993-06-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08596","name":"Johnson Donald"},"object":{"type":"operator","id":"P21940","name":"Lamplighter Mining Company Inc"},"validFrom":"1992-12-01","validTo":"1993-06-01","current":false,"derived":true,"evidenceMineId":"1516944","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P21940|1992-12-01|C08596|1980-11-07|77723"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22373","name":"D & L Mining Inc"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1993-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P22373|1993-06-02|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14859","name":"Lowe Dover"},"object":{"type":"mine","id":"1516944","name":"D And L No 1"},"validFrom":"1993-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|C14859|1993-06-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14859","name":"Lowe Dover"},"object":{"type":"operator","id":"P22373","name":"D & L Mining Inc"},"validFrom":"1993-06-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"1516944","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516944|P22373|1993-06-02|C14859|1993-06-02|94097"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1516944","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"}}