{"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":"1302189","name":"Stripping #2"},"operator":{"type":"operator","id":"0085824","name":"Hallett Materials"},"controller":{"type":"controller","id":"M06183","name":"CRH PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06971","name":"Mid America Materials Company"},"object":{"type":"mine","id":"1302189","name":"Stripping #2"},"validFrom":"1986-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|M06971|1986-09-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09703","name":"Hallett Materials"},"object":{"type":"mine","id":"1302189","name":"Stripping #2"},"validFrom":"1992-07-01","validTo":"1999-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|L09703|1992-07-01|1999-03-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06971","name":"Mid America Materials Company"},"object":{"type":"operator","id":"L09703","name":"Hallett Materials"},"validFrom":"1992-07-01","validTo":"1999-03-31","current":false,"derived":true,"evidenceMineId":"1302189","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|L09703|1992-07-01|M06971|1986-09-01|139742"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16568","name":"Hallett Materials Inc"},"object":{"type":"mine","id":"1302189","name":"Stripping #2"},"validFrom":"1999-04-01","validTo":"2008-01-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|L16568|1999-04-01|2008-01-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12677","name":"Rasmussen Group Inc"},"object":{"type":"mine","id":"1302189","name":"Stripping #2"},"validFrom":"1999-04-01","validTo":"2001-08-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|M12677|1999-04-01|2001-08-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12677","name":"Rasmussen Group Inc"},"object":{"type":"operator","id":"L16568","name":"Hallett Materials Inc"},"validFrom":"1999-04-01","validTo":"2001-08-10","current":false,"derived":true,"evidenceMineId":"1302189","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|L16568|1999-04-01|M12677|1999-04-01|154304"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"1302189","name":"Stripping #2"},"validFrom":"2001-08-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|M06183|2001-08-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L16568","name":"Hallett Materials Inc"},"validFrom":"2001-08-11","validTo":"2008-01-03","current":false,"derived":true,"evidenceMineId":"1302189","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|L16568|1999-04-01|M06183|2001-08-11|136922"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"1302189","name":"Stripping #2"},"validFrom":"2008-01-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|M06183|2008-01-03|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0085824","name":"Hallett Materials"},"object":{"type":"mine","id":"1302189","name":"Stripping #2"},"validFrom":"2008-01-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|0085824|2008-01-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"0085824","name":"Hallett Materials"},"validFrom":"2008-01-04","validTo":null,"current":true,"derived":true,"evidenceMineId":"1302189","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302189|0085824|2008-01-04|M06183|2008-01-03|137449"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1302189","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"}}