{"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":"1509325","name":"No 1 Surface"},"operator":{"type":"operator","id":"P17491","name":"B & H Elkhorn Coal Company"},"controller":{"type":"controller","id":"C10919","name":"Stanford Energy"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01270","name":"Ranier Harry Hale"},"object":{"type":"mine","id":"1509325","name":"No 1 Surface"},"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":"1509325|C01270|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00385","name":"B & H Elkhorn Coal Company"},"object":{"type":"mine","id":"1509325","name":"No 1 Surface"},"validFrom":"1975-11-06","validTo":"1977-12-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|P00385|1975-11-06|1977-12-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01270","name":"Ranier Harry Hale"},"object":{"type":"operator","id":"P00385","name":"B & H Elkhorn Coal Company"},"validFrom":"1975-11-06","validTo":"1977-12-11","current":false,"derived":true,"evidenceMineId":"1509325","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|P00385|1975-11-06|C01270|1950-01-01|53214"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07567","name":"B & H Elkhorn Coal Company"},"object":{"type":"mine","id":"1509325","name":"No 1 Surface"},"validFrom":"1977-12-12","validTo":"1983-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|P07567|1977-12-12|1983-06-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01255","name":"Zapata Corp"},"object":{"type":"mine","id":"1509325","name":"No 1 Surface"},"validFrom":"1977-12-12","validTo":"1983-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|C01255|1977-12-12|1983-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01255","name":"Zapata Corp"},"object":{"type":"operator","id":"P07567","name":"B & H Elkhorn Coal Company"},"validFrom":"1977-12-12","validTo":"1983-06-30","current":false,"derived":true,"evidenceMineId":"1509325","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|P07567|1977-12-12|C01255|1977-12-12|53134"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17491","name":"B & H Elkhorn Coal Company"},"object":{"type":"mine","id":"1509325","name":"No 1 Surface"},"validFrom":"1983-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|P17491|1983-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10919","name":"Stanford Energy"},"object":{"type":"mine","id":"1509325","name":"No 1 Surface"},"validFrom":"1983-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|C10919|1983-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10919","name":"Stanford Energy"},"object":{"type":"operator","id":"P17491","name":"B & H Elkhorn Coal Company"},"validFrom":"1983-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1509325","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509325|P17491|1983-07-01|C10919|1983-07-01|83111"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1509325","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"}}