{"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":"3001716","name":"BURDETT (GP4)"},"operator":{"type":"operator","id":"L16397","name":"Hanson Aggregates New York 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":"M00034","name":"Gene Dewitt Corporation"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|M00034|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07870","name":"South Hill Construction Company"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"1950-01-01","validTo":"1985-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L07870|1950-01-01|1985-02-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06258","name":"Edwin W  Voorhees"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"1950-01-01","validTo":"1985-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|M06258|1950-01-01|1985-02-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06258","name":"Edwin W  Voorhees"},"object":{"type":"operator","id":"L07870","name":"South Hill Construction Company"},"validFrom":"1950-01-01","validTo":"1985-02-28","current":false,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L07870|1950-01-01|M06258|1950-01-01|138009"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00085","name":"B R Dewitt Inc"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"1985-03-01","validTo":"1999-11-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L00085|1985-03-01|1999-11-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00034","name":"Gene Dewitt Corporation"},"object":{"type":"operator","id":"L00085","name":"B R Dewitt Inc"},"validFrom":"1985-03-01","validTo":"1999-11-14","current":false,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L00085|1985-03-01|M00034|1950-01-01|102265"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"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":"3001716|M00521|1988-11-14|2007-08-22"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17416","name":"Hanson Aggregates Brd Inc"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"1999-11-15","validTo":"2004-04-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L17416|1999-11-15|2004-04-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"1999-11-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|M00521|1999-11-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L17416","name":"Hanson Aggregates Brd Inc"},"validFrom":"1999-11-15","validTo":"2004-04-05","current":false,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L17416|1999-11-15|M00521|1999-11-15|112581"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17823","name":"Hanson Aggregates Inc"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"2004-04-06","validTo":"2004-06-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L17823|2004-04-06|2004-06-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates Inc"},"validFrom":"2004-04-06","validTo":"2004-06-10","current":false,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L17823|2004-04-06|M00521|1988-11-14|112270"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16397","name":"Hanson Aggregates New York Inc."},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"validFrom":"2004-06-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L16397|2004-06-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L16397","name":"Hanson Aggregates New York Inc."},"validFrom":"2004-06-11","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L16397|2004-06-11|M00521|1988-11-14|112271"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"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":"3001716|M00004|2007-08-23|2021-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates Inc"},"validFrom":"2007-08-23","validTo":"2004-06-10","current":false,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L17823|2004-04-06|M00004|2007-08-23|100643"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"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":"3001716|M00004|2007-08-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L16397","name":"Hanson Aggregates New York Inc."},"validFrom":"2007-08-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L16397|2004-06-11|M00004|2007-08-23|100867"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"3001716","name":"BURDETT (GP4)"},"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":"3001716|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 Inc"},"validFrom":"2021-10-01","validTo":"2004-06-10","current":false,"derived":true,"evidenceMineId":"3001716","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001716|L17823|2004-04-06|M00174|2021-10-01|106614"}}],"coverage":{"historyRecords":8,"edgeCount":20,"intervalAnomalies":2,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3001716","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"}}