{"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":"2026-10-18T09:31:49.615908+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":"2302239","name":"COURTNEY RIDGE PLANT"},"operator":{"type":"operator","id":"0126675","name":"Talon Concrete & Aggregates LLC"},"controller":{"type":"controller","id":"M00946","name":"Eagle Materials Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"mine","id":"2302239","name":"COURTNEY RIDGE PLANT"},"validFrom":"1987-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|M02063|1987-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13887","name":"Lafarge Construction Materials"},"object":{"type":"mine","id":"2302239","name":"COURTNEY RIDGE PLANT"},"validFrom":"2001-05-01","validTo":"2001-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|L13887|2001-05-01|2001-08-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"operator","id":"L13887","name":"Lafarge Construction Materials"},"validFrom":"2001-05-01","validTo":"2001-08-31","current":false,"derived":true,"evidenceMineId":"2302239","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|L13887|2001-05-01|M02063|1987-01-01|123305"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"mine","id":"2302239","name":"COURTNEY RIDGE PLANT"},"validFrom":"2001-07-12","validTo":"2015-07-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|M02063|2001-07-12|2015-07-09"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18663","name":"Lafarge North America Inc."},"object":{"type":"mine","id":"2302239","name":"COURTNEY RIDGE PLANT"},"validFrom":"2001-09-01","validTo":"2012-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|L18663|2001-09-01|2012-11-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"operator","id":"L18663","name":"Lafarge North America Inc."},"validFrom":"2001-09-01","validTo":"2012-11-30","current":false,"derived":true,"evidenceMineId":"2302239","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|L18663|2001-09-01|M02063|2001-07-12|123467"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0126675","name":"Talon Concrete & Aggregates LLC"},"object":{"type":"mine","id":"2302239","name":"COURTNEY RIDGE PLANT"},"validFrom":"2012-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|0126675|2012-12-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00946","name":"Eagle Materials Inc"},"object":{"type":"mine","id":"2302239","name":"COURTNEY RIDGE PLANT"},"validFrom":"2012-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|M00946|2012-12-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00946","name":"Eagle Materials Inc"},"object":{"type":"operator","id":"0126675","name":"Talon Concrete & Aggregates LLC"},"validFrom":"2012-12-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2302239","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|0126675|2012-12-01|M00946|2012-12-01|116074"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"mine","id":"2302239","name":"COURTNEY RIDGE PLANT"},"validFrom":"2015-07-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|0119681|2015-07-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"operator","id":"L18663","name":"Lafarge North America Inc."},"validFrom":"2015-07-10","validTo":"2012-11-30","current":false,"derived":true,"evidenceMineId":"2302239","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2302239|L18663|2001-09-01|0119681|2015-07-10|23241"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2302239","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}