{"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":"3100002","name":"Mount Airy Plant"},"operator":{"type":"operator","id":"L06215","name":"Luck Stone Corporation"},"controller":{"type":"controller","id":"M01765","name":"Charles S  Luck IV"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02032","name":"Ararat Rock Products"},"object":{"type":"mine","id":"3100002","name":"Mount Airy Plant"},"validFrom":"1950-01-01","validTo":"2021-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3100002|L02032|1950-01-01|2021-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01765","name":"Charles S  Luck IV  et al"},"object":{"type":"mine","id":"3100002","name":"Mount Airy Plant"},"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":"3100002|M01765|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01822","name":"James H  Crossingham"},"object":{"type":"mine","id":"3100002","name":"Mount Airy Plant"},"validFrom":"1950-01-01","validTo":"2020-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3100002|M01822|1950-01-01|2020-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01822","name":"James H  Crossingham"},"object":{"type":"operator","id":"L02032","name":"Ararat Rock Products"},"validFrom":"1950-01-01","validTo":"2020-06-30","current":false,"derived":true,"evidenceMineId":"3100002","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3100002|L02032|1950-01-01|M01822|1950-01-01|121466"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0158225","name":"James H  Crossingham IV"},"object":{"type":"mine","id":"3100002","name":"Mount Airy Plant"},"validFrom":"2020-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3100002|0158225|2020-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0158225","name":"James H  Crossingham IV"},"object":{"type":"operator","id":"L02032","name":"Ararat Rock Products"},"validFrom":"2020-07-01","validTo":"2021-09-30","current":false,"derived":true,"evidenceMineId":"3100002","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3100002|L02032|1950-01-01|0158225|2020-07-01|32743"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06215","name":"Luck Stone Corporation"},"object":{"type":"mine","id":"3100002","name":"Mount Airy Plant"},"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":"3100002|L06215|2021-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01765","name":"Charles S  Luck IV  et al"},"object":{"type":"operator","id":"L06215","name":"Luck Stone Corporation"},"validFrom":"2021-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"3100002","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3100002|L06215|2021-10-01|M01765|1950-01-01|120830"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3100002","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"}}