{"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":"3402198","name":"Mill Creek Quarry"},"operator":{"type":"operator","id":"0174514","name":"Heidelberg Materials Southwest LLC"},"controller":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3402198","name":"Mill Creek Quarry"},"validFrom":"1988-11-14","validTo":"2007-08-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|M00521|1988-11-14|2007-08-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3402198","name":"Mill Creek Quarry"},"validFrom":"2007-08-23","validTo":"2021-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|M00004|2007-08-23|2021-09-30"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17823","name":"Hanson Aggregates LLC"},"object":{"type":"mine","id":"3402198","name":"Mill Creek Quarry"},"validFrom":"2019-10-04","validTo":"2023-04-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|L17823|2019-10-04|2023-04-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates LLC"},"validFrom":"2019-10-04","validTo":"2021-09-30","current":false,"derived":true,"evidenceMineId":"3402198","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|L17823|2019-10-04|M00004|2007-08-23|100649"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates LLC"},"validFrom":"2019-10-04","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"3402198","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|L17823|2019-10-04|M00521|1988-11-14|112331"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3402198","name":"Mill Creek Quarry"},"validFrom":"2021-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|M00004|2021-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"3402198","name":"Mill Creek Quarry"},"validFrom":"2021-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|M00174|2021-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates LLC"},"validFrom":"2021-10-01","validTo":"2023-04-24","current":false,"derived":true,"evidenceMineId":"3402198","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|L17823|2019-10-04|M00174|2021-10-01|106620"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0174514","name":"Heidelberg Materials Southwest LLC"},"object":{"type":"mine","id":"3402198","name":"Mill Creek Quarry"},"validFrom":"2023-04-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|0174514|2023-04-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"0174514","name":"Heidelberg Materials Southwest LLC"},"validFrom":"2023-04-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"3402198","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402198|0174514|2023-04-25|M00004|2021-01-01|101053"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3402198","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"}}