{"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":"4400210","name":"Manassas Pit #1"},"operator":{"type":"operator","id":"L17062","name":"Glen-Gery Corporation"},"controller":{"type":"controller","id":"0151641","name":"Brickworks Limited"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04685","name":"Glen-Gery Corp"},"object":{"type":"mine","id":"4400210","name":"Manassas Pit #1"},"validFrom":"1950-01-01","validTo":"1999-05-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|L04685|1950-01-01|1999-05-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02456","name":"Ibstock Plc"},"object":{"type":"mine","id":"4400210","name":"Manassas Pit #1"},"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":"4400210|M02456|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02456","name":"Ibstock Plc"},"object":{"type":"operator","id":"L04685","name":"Glen-Gery Corp"},"validFrom":"1950-01-01","validTo":"1999-05-16","current":false,"derived":true,"evidenceMineId":"4400210","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|L04685|1950-01-01|M02456|1950-01-01|125542"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17062","name":"Glen-Gery Corporation"},"object":{"type":"mine","id":"4400210","name":"Manassas Pit #1"},"validFrom":"1999-05-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|L17062|1999-05-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"4400210","name":"Manassas Pit #1"},"validFrom":"1999-05-17","validTo":"2015-02-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|M06183|1999-05-17|2015-02-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L17062","name":"Glen-Gery Corporation"},"validFrom":"1999-05-17","validTo":"2015-02-25","current":false,"derived":true,"evidenceMineId":"4400210","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|L17062|1999-05-17|M06183|1999-05-17|136788"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0117441","name":"FIGGS BIDCO 2 LIMITED"},"object":{"type":"mine","id":"4400210","name":"Manassas Pit #1"},"validFrom":"2015-02-26","validTo":"2018-11-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|0117441|2015-02-26|2018-11-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0117441","name":"FIGGS BIDCO 2 LIMITED"},"object":{"type":"operator","id":"L17062","name":"Glen-Gery Corporation"},"validFrom":"2015-02-26","validTo":"2018-11-22","current":false,"derived":true,"evidenceMineId":"4400210","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|L17062|1999-05-17|0117441|2015-02-26|22324"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0151641","name":"Brickworks Limited"},"object":{"type":"mine","id":"4400210","name":"Manassas Pit #1"},"validFrom":"2018-11-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|0151641|2018-11-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0151641","name":"Brickworks Limited"},"object":{"type":"operator","id":"L17062","name":"Glen-Gery Corporation"},"validFrom":"2018-11-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"4400210","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4400210|L17062|1999-05-17|0151641|2018-11-23|31361"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4400210","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"}}