{"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":"0900721","name":"Fayette County 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":"L00113","name":"Hitchcock Corp"},"object":{"type":"mine","id":"0900721","name":"Fayette County Quarry"},"validFrom":"1950-01-01","validTo":"1979-05-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|L00113|1950-01-01|1979-05-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00092","name":"Francis  Bourne"},"object":{"type":"mine","id":"0900721","name":"Fayette County Quarry"},"validFrom":"1950-01-01","validTo":"1979-08-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|M00092|1950-01-01|1979-08-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00092","name":"Francis  Bourne"},"object":{"type":"operator","id":"L00113","name":"Hitchcock Corp"},"validFrom":"1950-01-01","validTo":"1979-05-03","current":false,"derived":true,"evidenceMineId":"0900721","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|L00113|1950-01-01|M00092|1950-01-01|104042"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00002","name":"Koppers Company Inc"},"object":{"type":"mine","id":"0900721","name":"Fayette County Quarry"},"validFrom":"1979-02-01","validTo":"1988-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|M00002|1979-02-01|1988-11-13"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00755","name":"Davidson Mineral Properties Inc"},"object":{"type":"mine","id":"0900721","name":"Fayette County Quarry"},"validFrom":"1979-05-04","validTo":"1988-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|L00755|1979-05-04|1988-11-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00002","name":"Koppers Company Inc"},"object":{"type":"operator","id":"L00755","name":"Davidson Mineral Properties Inc"},"validFrom":"1979-05-04","validTo":"1988-11-13","current":false,"derived":true,"evidenceMineId":"0900721","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|L00755|1979-05-04|M00002|1979-02-01|100354"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16897","name":"Heidelberg Materials Southeast Agg., LLC"},"object":{"type":"mine","id":"0900721","name":"Fayette County 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":"0900721|L16897|1988-11-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"0900721","name":"Fayette County 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":"0900721|M00521|1988-11-14|2007-08-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L16897","name":"Heidelberg Materials Southeast Agg., LLC"},"validFrom":"1988-11-14","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"0900721","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|L16897|1988-11-14|M00521|1988-11-14|112135"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"0900721","name":"Fayette County 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":"0900721|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":"0900721","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900721|L16897|1988-11-14|M00004|2007-08-23|100705"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0900721","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"}}