{"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":"0900020","name":"Highpoint Quarry"},"operator":{"type":"operator","id":"L05627","name":"Star Granite Co."},"controller":{"type":"controller","id":"M04543","name":"F L (Rusty)  Adams"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04543","name":"F L (Rusty)  Adams"},"object":{"type":"mine","id":"0900020","name":"Highpoint Quarry"},"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":"0900020|M04543|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L32975","name":"Elberton Granite Industries"},"object":{"type":"mine","id":"0900020","name":"Highpoint Quarry"},"validFrom":"1950-01-01","validTo":"2014-04-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900020|L32975|1950-01-01|2014-04-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M32975","name":"John D  Mc Lanahan  et al"},"object":{"type":"mine","id":"0900020","name":"Highpoint Quarry"},"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":"0900020|M32975|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M32975","name":"John D  Mc Lanahan  et al"},"object":{"type":"operator","id":"L32975","name":"Elberton Granite Industries"},"validFrom":"1950-01-01","validTo":"2014-04-15","current":false,"derived":true,"evidenceMineId":"0900020","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900020|L32975|1950-01-01|M32975|1950-01-01|161511"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M32975","name":"John D  Mc Lanahan Jr  et al"},"object":{"type":"operator","id":"L32975","name":"Elberton Granite Industries"},"validFrom":"1950-01-01","validTo":"2014-04-15","current":false,"derived":true,"evidenceMineId":"0900020","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900020|L32975|1950-01-01|M32975|1950-01-01|161512"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05627","name":"Star Granite Co."},"object":{"type":"mine","id":"0900020","name":"Highpoint Quarry"},"validFrom":"2014-04-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900020|L05627|2014-04-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04543","name":"F L (Rusty)  Adams"},"object":{"type":"operator","id":"L05627","name":"Star Granite Co."},"validFrom":"2014-04-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"0900020","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900020|L05627|2014-04-16|M04543|1950-01-01|132204"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0900020","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"}}