{"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":"4405046","name":"Chesapeake Plant"},"operator":{"type":"operator","id":"L08444","name":"Imerys Norfolk, Inc."},"controller":{"type":"controller","id":"M11763","name":"Imerys S A"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00122","name":"Lone Star Industries Inc"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|M00122|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00167","name":"Lone Star Cement Inc"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"1978-03-09","validTo":"1984-06-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L00167|1978-03-09|1984-06-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00122","name":"Lone Star Industries Inc"},"object":{"type":"operator","id":"L00167","name":"Lone Star Cement Inc"},"validFrom":"1978-03-09","validTo":"1984-06-17","current":false,"derived":true,"evidenceMineId":"4405046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L00167|1978-03-09|M00122|1950-01-01|104700"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07161","name":"Lone Star Lafarge Inc"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"1984-06-18","validTo":"1985-11-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L07161|1984-06-18|1985-11-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05711","name":"Lone Star Indus Inc & Lafarge Fondu International"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"1984-06-18","validTo":"1985-11-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|M05711|1984-06-18|1985-11-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05711","name":"Lone Star Indus Inc & Lafarge Fondu International"},"object":{"type":"operator","id":"L07161","name":"Lone Star Lafarge Inc"},"validFrom":"1984-06-18","validTo":"1985-11-19","current":false,"derived":true,"evidenceMineId":"4405046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L07161|1984-06-18|M05711|1984-06-18|135197"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08444","name":"Imerys Norfolk, Inc."},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"1985-11-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L08444|1985-11-20|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"1985-11-20","validTo":"2003-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|M02063|1985-11-20|2003-10-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"operator","id":"L08444","name":"Imerys Norfolk, Inc."},"validFrom":"1985-11-20","validTo":"2003-10-31","current":false,"derived":true,"evidenceMineId":"4405046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L08444|1985-11-20|M02063|1985-11-20|123263"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0056749","name":"Materis SA"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"2003-11-01","validTo":"2014-03-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|0056749|2003-11-01|2014-03-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0056749","name":"Materis SA"},"object":{"type":"operator","id":"L08444","name":"Imerys Norfolk, Inc."},"validFrom":"2003-11-01","validTo":"2014-03-25","current":false,"derived":true,"evidenceMineId":"4405046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L08444|1985-11-20|0056749|2003-11-01|7446"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0116883","name":"Astorg Partners"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"2014-03-26","validTo":"2019-07-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|0116883|2014-03-26|2019-07-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0116883","name":"Astorg Partners"},"object":{"type":"operator","id":"L08444","name":"Imerys Norfolk, Inc."},"validFrom":"2014-03-26","validTo":"2019-07-08","current":false,"derived":true,"evidenceMineId":"4405046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L08444|1985-11-20|0116883|2014-03-26|22174"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11763","name":"Imerys S A"},"object":{"type":"mine","id":"4405046","name":"Chesapeake Plant"},"validFrom":"2019-07-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|M11763|2019-07-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11763","name":"Imerys S A"},"object":{"type":"operator","id":"L08444","name":"Imerys Norfolk, Inc."},"validFrom":"2019-07-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"4405046","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405046|L08444|1985-11-20|M11763|2019-07-09|152354"}}],"coverage":{"historyRecords":6,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4405046","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"}}