{"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":"3800671","name":"Greenwood Quarry"},"operator":{"type":"operator","id":"L16897","name":"Hanson Aggregates Southeast Inc"},"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":"3800671","name":"Greenwood 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":"3800671|M00521|1988-11-14|2007-08-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3800671","name":"Greenwood 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":"3800671|M00521|1988-11-14|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13670","name":"Wilson Quarry Inc"},"object":{"type":"mine","id":"3800671","name":"Greenwood Quarry"},"validFrom":"1994-08-01","validTo":"1996-04-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L13670|1994-08-01|1996-04-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03405","name":"Thomas W  Wilson"},"object":{"type":"mine","id":"3800671","name":"Greenwood Quarry"},"validFrom":"1994-08-01","validTo":"1996-04-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|M03405|1994-08-01|1996-04-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03405","name":"Thomas W  Wilson"},"object":{"type":"operator","id":"L13670","name":"Wilson Quarry Inc"},"validFrom":"1994-08-01","validTo":"1996-04-22","current":false,"derived":true,"evidenceMineId":"3800671","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L13670|1994-08-01|M03405|1994-08-01|128973"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11026","name":"Stewart H  Johnson"},"object":{"type":"mine","id":"3800671","name":"Greenwood Quarry"},"validFrom":"1995-09-01","validTo":"1999-08-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|M11026|1995-09-01|1999-08-02"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14444","name":"Morgan Corp"},"object":{"type":"mine","id":"3800671","name":"Greenwood Quarry"},"validFrom":"1996-04-23","validTo":"1999-08-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L14444|1996-04-23|1999-08-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11026","name":"Stewart H  Johnson"},"object":{"type":"operator","id":"L14444","name":"Morgan Corp"},"validFrom":"1996-04-23","validTo":"1999-08-02","current":false,"derived":true,"evidenceMineId":"3800671","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L14444|1996-04-23|M11026|1995-09-01|150538"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16323","name":"Hanson Aggregates East Inc"},"object":{"type":"mine","id":"3800671","name":"Greenwood Quarry"},"validFrom":"1999-08-03","validTo":"2001-09-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L16323|1999-08-03|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":"1999-08-03","validTo":"2001-09-12","current":false,"derived":true,"evidenceMineId":"3800671","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L16323|1999-08-03|M00521|1988-11-14|112480"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16897","name":"Hanson Aggregates Southeast Inc"},"object":{"type":"mine","id":"3800671","name":"Greenwood 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":"3800671|L16897|2001-09-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L16897","name":"Hanson Aggregates Southeast Inc"},"validFrom":"2001-09-13","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"3800671","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L16897|2001-09-13|M00521|1988-11-14|112383"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3800671","name":"Greenwood 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":"3800671|M00004|2007-08-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L16897","name":"Hanson Aggregates Southeast Inc"},"validFrom":"2007-08-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"3800671","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3800671|L16897|2001-09-13|M00004|2007-08-23|101005"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3800671","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"}}