{"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":"1513925","name":"No 2 Mine"},"operator":{"type":"operator","id":"P19864","name":"Bray Mining Company"},"controller":{"type":"controller","id":"C13583","name":"Bray Steven"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10346","name":"Gray Letcher Et Al"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1983-02-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|C10346|1983-02-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P14214","name":"G & H Coal Company"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1983-02-01","validTo":"1985-03-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P14214|1983-02-01|1985-03-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10348","name":"Gray Letcher-Bobby Ray Payne Et Al"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1983-02-01","validTo":"1985-03-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|C10348|1983-02-01|1985-03-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10348","name":"Gray Letcher-Bobby Ray Payne Et Al"},"object":{"type":"operator","id":"P14214","name":"G & H Coal Company"},"validFrom":"1983-02-01","validTo":"1985-03-17","current":false,"derived":true,"evidenceMineId":"1513925","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P14214|1983-02-01|C10348|1983-02-01|81810"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P16652","name":"Legra Coal Company Inc"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1985-03-18","validTo":"1987-08-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P16652|1985-03-18|1987-08-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10346","name":"Gray Letcher Et Al"},"object":{"type":"operator","id":"P16652","name":"Legra Coal Company Inc"},"validFrom":"1985-03-18","validTo":"1987-08-13","current":false,"derived":true,"evidenceMineId":"1513925","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P16652|1985-03-18|C10346|1983-02-01|81805"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12947","name":"Davidson Charles Et Al"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1987-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|C12947|1987-03-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18628","name":"Davidson Coal Company"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1987-08-14","validTo":"1988-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P18628|1987-08-14|1988-08-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12947","name":"Davidson Charles Et Al"},"object":{"type":"operator","id":"P18628","name":"Davidson Coal Company"},"validFrom":"1987-08-14","validTo":"1988-08-31","current":false,"derived":true,"evidenceMineId":"1513925","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P18628|1987-08-14|C12947|1987-03-01|88222"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19864","name":"Bray Mining Company"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1988-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P19864|1988-09-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13583","name":"Bray Steven"},"object":{"type":"mine","id":"1513925","name":"No 2 Mine"},"validFrom":"1988-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|C13583|1988-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13583","name":"Bray Steven"},"object":{"type":"operator","id":"P19864","name":"Bray Mining Company"},"validFrom":"1988-09-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1513925","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513925|P19864|1988-09-01|C13583|1988-09-01|90565"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1513925","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"}}