{"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":"2000362","name":"River Rouge Facility"},"operator":{"type":"operator","id":"0050945","name":"Carmeuse Lime and Stone, Inc"},"controller":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00222","name":"Marblehead Lime Company"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"1950-01-01","validTo":"1994-05-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L00222|1950-01-01|1994-05-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00073","name":"General Dynamics Corp"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"1950-01-01","validTo":"1994-05-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|M00073|1950-01-01|1994-05-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00073","name":"General Dynamics Corp"},"object":{"type":"operator","id":"L00222","name":"Marblehead Lime Company"},"validFrom":"1950-01-01","validTo":"1994-05-08","current":false,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L00222|1950-01-01|M00073|1950-01-01|103416"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"1994-05-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|M10266|1994-05-08|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13534","name":"Marblehead Lime Company"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"1994-05-09","validTo":"2000-02-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L13534|1994-05-09|2000-02-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"operator","id":"L13534","name":"Marblehead Lime Company"},"validFrom":"1994-05-09","validTo":"2000-02-14","current":false,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L13534|1994-05-09|M10266|1994-05-08|148747"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"1997-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|M10266|1997-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17975","name":"Marblehead Lime Company"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"2000-02-15","validTo":"2001-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L17975|2000-02-15|2001-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12849","name":"Lafarge SA"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"2000-02-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|M12849|2000-02-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12849","name":"Lafarge SA"},"object":{"type":"operator","id":"L17975","name":"Marblehead Lime Company"},"validFrom":"2000-02-15","validTo":"2001-12-31","current":false,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L17975|2000-02-15|M12849|2000-02-15|154749"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12849","name":"Carmeuse Holding SA"},"object":{"type":"operator","id":"L17975","name":"Marblehead Lime Company"},"validFrom":"2000-02-15","validTo":"2001-12-31","current":false,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L17975|2000-02-15|M12849|2000-02-15|154750"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14947","name":"Carmeuse Lime Inc"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"2002-01-01","validTo":"2010-10-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L14947|2002-01-01|2010-10-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"operator","id":"L14947","name":"Carmeuse Lime Inc"},"validFrom":"2002-01-01","validTo":"2010-10-13","current":false,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|L14947|2002-01-01|M10266|1997-01-01|148756"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12849","name":"Carmeuse Holding SA"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"2002-06-20","validTo":"2015-07-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|M12849|2002-06-20|2015-07-14"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0050945","name":"Carmeuse Lime and Stone, Inc"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"2010-10-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|0050945|2010-10-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12849","name":"Carmeuse Holding SA"},"object":{"type":"operator","id":"0050945","name":"Carmeuse Lime and Stone, Inc"},"validFrom":"2010-10-14","validTo":"2015-07-14","current":false,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|0050945|2010-10-14|M12849|2002-06-20|154771"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12849","name":"Lafarge SA"},"object":{"type":"operator","id":"0050945","name":"Carmeuse Lime and Stone, Inc"},"validFrom":"2010-10-14","validTo":"2015-07-14","current":false,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|0050945|2010-10-14|M12849|2002-06-20|154772"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"mine","id":"2000362","name":"River Rouge Facility"},"validFrom":"2015-07-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|M10266|2015-07-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"operator","id":"0050945","name":"Carmeuse Lime and Stone, Inc"},"validFrom":"2015-07-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"2000362","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000362|0050945|2010-10-14|M10266|2015-07-15|148825"}}],"coverage":{"historyRecords":8,"edgeCount":19,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2000362","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"}}