{"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":"3800308","name":"Lowrys Quarry"},"operator":{"type":"operator","id":"L16897","name":"Heidelberg Materials Southeast Agg., 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":"operator_operates_mine","subject":{"type":"operator","id":"L01762","name":"Contractors & Materials Inc"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"1950-01-01","validTo":"1987-12-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L01762|1950-01-01|1987-12-06"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00131","name":"Dickerson Group Inc"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"1950-01-01","validTo":"1987-12-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|M00131|1950-01-01|1987-12-06"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00131","name":"Dickerson Group Inc"},"object":{"type":"operator","id":"L01762","name":"Contractors & Materials Inc"},"validFrom":"1950-01-01","validTo":"1987-12-06","current":false,"derived":true,"evidenceMineId":"3800308","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L01762|1950-01-01|M00131|1950-01-01|104860"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06374","name":"Alfred Mc Alpine Inc"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"1986-02-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|M06374|1986-02-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10567","name":"Becker Minerals Inc"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"1987-12-07","validTo":"1999-04-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L10567|1987-12-07|1999-04-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06374","name":"Alfred Mc Alpine Inc"},"object":{"type":"operator","id":"L10567","name":"Becker Minerals Inc"},"validFrom":"1987-12-07","validTo":"1999-04-11","current":false,"derived":true,"evidenceMineId":"3800308","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L10567|1987-12-07|M06374|1986-02-28|138362"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3800308","name":"Lowrys 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":"3800308|M00521|1988-11-14|2007-08-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"1988-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|M00521|1988-11-14|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16323","name":"Hanson Aggregates East Inc"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"1999-04-12","validTo":"2001-09-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L16323|1999-04-12|2001-09-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L16323","name":"Hanson Aggregates East Inc"},"validFrom":"1999-04-12","validTo":"2001-09-12","current":false,"derived":true,"evidenceMineId":"3800308","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L16323|1999-04-12|M00521|1988-11-14|112477"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16897","name":"Heidelberg Materials Southeast Agg., LLC"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"2001-09-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L16897|2001-09-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L16897","name":"Heidelberg Materials Southeast Agg., LLC"},"validFrom":"2001-09-13","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"3800308","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L16897|2001-09-13|M00521|1988-11-14|112379"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3800308","name":"Lowrys Quarry"},"validFrom":"2007-08-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|M00004|2007-08-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L16897","name":"Heidelberg Materials Southeast Agg., LLC"},"validFrom":"2007-08-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"3800308","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800308|L16897|2001-09-13|M00004|2007-08-23|101001"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3800308","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"}}