{"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":"2026-10-17T05:35:58.500035+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":"3608309","name":"Russellton Site"},"operator":{"type":"operator","id":"P22671","name":"ACV Power Corporation"},"controller":{"type":"controller","id":"C15009","name":"Niles V  Powell"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22126","name":"Four-D Coal Company Inc"},"object":{"type":"mine","id":"3608309","name":"Russellton Site"},"validFrom":"1991-12-01","validTo":"1994-04-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3608309|P22126|1991-12-01|1994-04-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14735","name":"B A  Steyer"},"object":{"type":"mine","id":"3608309","name":"Russellton Site"},"validFrom":"1991-12-01","validTo":"1994-04-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3608309|C14735|1991-12-01|1994-04-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14735","name":"B A  Steyer"},"object":{"type":"operator","id":"P22126","name":"Four-D Coal Company Inc"},"validFrom":"1991-12-01","validTo":"1994-04-11","current":false,"derived":true,"evidenceMineId":"3608309","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3608309|P22126|1991-12-01|C14735|1991-12-01|93764"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15009","name":"Niles V  Powell"},"object":{"type":"mine","id":"3608309","name":"Russellton Site"},"validFrom":"1993-11-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3608309|C15009|1993-11-12|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22671","name":"Acv Power Corp"},"object":{"type":"mine","id":"3608309","name":"Russellton Site"},"validFrom":"1994-04-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3608309|P22671|1994-04-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15009","name":"Niles V  Powell"},"object":{"type":"operator","id":"P22671","name":"Acv Power Corp"},"validFrom":"1994-04-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"3608309","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3608309|P22671|1994-04-12|C15009|1993-11-12|94569"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3608309","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}