{"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":"1102580","name":"Blue Blaze Prep Plant"},"operator":{"type":"operator","id":"P06391","name":"Southern Illinois Mineral Corp"},"controller":{"type":"controller","id":"C05308","name":"Burks James L"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04710","name":"Blue Blaze Coal Company Inc"},"object":{"type":"mine","id":"1102580","name":"Blue Blaze Prep Plant"},"validFrom":"1976-12-01","validTo":"1977-05-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102580|P04710|1976-12-01|1977-05-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01348","name":"Dyer Robert"},"object":{"type":"mine","id":"1102580","name":"Blue Blaze Prep Plant"},"validFrom":"1976-12-01","validTo":"1977-05-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102580|C01348|1976-12-01|1977-05-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01348","name":"Dyer Robert"},"object":{"type":"operator","id":"P04710","name":"Blue Blaze Coal Company Inc"},"validFrom":"1976-12-01","validTo":"1977-05-17","current":false,"derived":true,"evidenceMineId":"1102580","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102580|P04710|1976-12-01|C01348|1976-12-01|53743"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05308","name":"Burks James L"},"object":{"type":"mine","id":"1102580","name":"Blue Blaze Prep Plant"},"validFrom":"1977-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102580|C05308|1977-03-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06391","name":"Southern Illinois Mineral Corp"},"object":{"type":"mine","id":"1102580","name":"Blue Blaze Prep Plant"},"validFrom":"1977-05-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102580|P06391|1977-05-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05308","name":"Burks James L"},"object":{"type":"operator","id":"P06391","name":"Southern Illinois Mineral Corp"},"validFrom":"1977-05-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"1102580","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102580|P06391|1977-05-18|C05308|1977-03-01|68157"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1102580","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"}}