{"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":"0505046","name":"Pit 25-Morton Lakes"},"operator":{"type":"operator","id":"L03999","name":"Ready Mixed Concrete Company"},"controller":{"type":"controller","id":"M13648","name":"James C  Marvel Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03203","name":"Frank P Spratlen et al"},"object":{"type":"mine","id":"0505046","name":"Pit 25-Morton Lakes"},"validFrom":"1978-07-01","validTo":"2004-09-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0505046|M03203|1978-07-01|2004-09-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00202","name":"Boral Limited"},"object":{"type":"mine","id":"0505046","name":"Pit 25-Morton Lakes"},"validFrom":"2004-09-13","validTo":"2018-07-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0505046|M00202|2004-09-13|2018-07-01"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03999","name":"Ready Mixed Concrete Company"},"object":{"type":"mine","id":"0505046","name":"Pit 25-Morton Lakes"},"validFrom":"2015-05-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0505046|L03999|2015-05-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00202","name":"Boral Limited"},"object":{"type":"operator","id":"L03999","name":"Ready Mixed Concrete Company"},"validFrom":"2015-05-26","validTo":"2018-07-01","current":false,"derived":true,"evidenceMineId":"0505046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0505046|L03999|2015-05-26|M00202|2004-09-13|107360"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03203","name":"Frank P Spratlen et al"},"object":{"type":"operator","id":"L03999","name":"Ready Mixed Concrete Company"},"validFrom":"2015-05-26","validTo":"2004-09-12","current":false,"derived":true,"evidenceMineId":"0505046","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0505046|L03999|2015-05-26|M03203|1978-07-01|128440"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13648","name":"James C  Marvel Jr"},"object":{"type":"mine","id":"0505046","name":"Pit 25-Morton Lakes"},"validFrom":"2018-07-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0505046|M13648|2018-07-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13648","name":"James C  Marvel Jr"},"object":{"type":"operator","id":"L03999","name":"Ready Mixed Concrete Company"},"validFrom":"2018-07-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"0505046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0505046|L03999|2015-05-26|M13648|2018-07-02|156731"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0505046","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"}}