{"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":"1302149","name":"Fostoria Plant"},"operator":{"type":"operator","id":"L16568","name":"Hallett Materials Inc"},"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":"M06272","name":"Roy  Rohlin"},"object":{"type":"mine","id":"1302149","name":"Fostoria Plant"},"validFrom":"1950-01-01","validTo":"2005-04-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|M06272|1950-01-01|2005-04-04"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07891","name":"Rohlin Construction Company Inc"},"object":{"type":"mine","id":"1302149","name":"Fostoria Plant"},"validFrom":"1987-12-01","validTo":"2005-09-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|L07891|1987-12-01|2005-09-06"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06272","name":"Roy  Rohlin"},"object":{"type":"operator","id":"L07891","name":"Rohlin Construction Company Inc"},"validFrom":"1987-12-01","validTo":"2005-04-04","current":false,"derived":true,"evidenceMineId":"1302149","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|L07891|1987-12-01|M06272|1950-01-01|138048"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12677","name":"Rasmussen Group Inc"},"object":{"type":"mine","id":"1302149","name":"Fostoria Plant"},"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":"1302149|M12677|1999-04-01|2001-08-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"1302149","name":"Fostoria Plant"},"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":"1302149|M06183|2001-08-11|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"1302149","name":"Fostoria Plant"},"validFrom":"2005-04-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|M06183|2005-04-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L07891","name":"Rohlin Construction Company Inc"},"validFrom":"2005-04-05","validTo":"2005-09-06","current":false,"derived":true,"evidenceMineId":"1302149","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|L07891|1987-12-01|M06183|2005-04-05|137102"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16568","name":"Hallett Materials Inc"},"object":{"type":"mine","id":"1302149","name":"Fostoria Plant"},"validFrom":"2005-09-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|L16568|2005-09-07|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L16568","name":"Hallett Materials Inc"},"validFrom":"2005-09-07","validTo":null,"current":true,"derived":true,"evidenceMineId":"1302149","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|L16568|2005-09-07|M06183|2001-08-11|136919"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12677","name":"Rasmussen Group Inc"},"object":{"type":"operator","id":"L16568","name":"Hallett Materials Inc"},"validFrom":"2005-09-07","validTo":"2001-08-10","current":false,"derived":true,"evidenceMineId":"1302149","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302149|L16568|2005-09-07|M12677|1999-04-01|154301"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1302149","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"}}