{"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":"2026-10-17T05:35:58.500035+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":"0301895","name":"North Harrison Quarry"},"operator":{"type":"operator","id":"L11502","name":"APAC-Central, Inc"},"controller":{"type":"controller","id":"M06183","name":"CRH PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00049","name":"Ashland Inc"},"object":{"type":"mine","id":"0301895","name":"North Harrison Quarry"},"validFrom":"1950-01-01","validTo":"2006-08-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|M00049|1950-01-01|2006-08-27"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0055339","name":"Rains Contracting Inc"},"object":{"type":"mine","id":"0301895","name":"North Harrison Quarry"},"validFrom":"2004-07-27","validTo":"2010-11-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|0055339|2004-07-27|2010-11-07"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0045909","name":"Dennis W  Rains et al"},"object":{"type":"mine","id":"0301895","name":"North Harrison Quarry"},"validFrom":"2004-07-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|0045909|2004-07-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0045909","name":"Dennis W  Rains et al"},"object":{"type":"operator","id":"0055339","name":"Rains Contracting Inc"},"validFrom":"2004-07-27","validTo":"2010-11-07","current":false,"derived":true,"evidenceMineId":"0301895","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|0055339|2004-07-27|0045909|2004-07-27|5543"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0045909","name":"Cindy G  Rains et al"},"object":{"type":"operator","id":"0055339","name":"Rains Contracting Inc"},"validFrom":"2004-07-27","validTo":"2010-11-07","current":false,"derived":true,"evidenceMineId":"0301895","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|0055339|2004-07-27|0045909|2004-07-27|5544"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"0301895","name":"North Harrison Quarry"},"validFrom":"2006-08-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|M06183|2006-08-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11502","name":"APAC-Central, Inc"},"object":{"type":"mine","id":"0301895","name":"North Harrison Quarry"},"validFrom":"2010-11-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|L11502|2010-11-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00049","name":"Ashland Inc"},"object":{"type":"operator","id":"L11502","name":"APAC-Central, Inc"},"validFrom":"2010-11-08","validTo":"2006-08-27","current":false,"derived":true,"evidenceMineId":"0301895","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|L11502|2010-11-08|M00049|1950-01-01|102600"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L11502","name":"APAC-Central, Inc"},"validFrom":"2010-11-08","validTo":null,"current":true,"derived":true,"evidenceMineId":"0301895","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301895|L11502|2010-11-08|M06183|2006-08-28|137222"}}],"coverage":{"historyRecords":4,"edgeCount":9,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0301895","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}