{"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":"1508625","name":"No 1 Mine"},"operator":{"type":"operator","id":"P08058","name":"C & A Coal Company"},"controller":{"type":"controller","id":"C06496","name":"Combs Robert & Asbel Adkins"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03329","name":"Omega Mining Company Inc"},"object":{"type":"mine","id":"1508625","name":"No 1 Mine"},"validFrom":"1975-08-01","validTo":"1977-08-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|P03329|1975-08-01|1977-08-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02757","name":"Davidson Mart"},"object":{"type":"mine","id":"1508625","name":"No 1 Mine"},"validFrom":"1975-08-01","validTo":"1977-08-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|C02757|1975-08-01|1977-08-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02757","name":"Davidson Mart"},"object":{"type":"operator","id":"P03329","name":"Omega Mining Company Inc"},"validFrom":"1975-08-01","validTo":"1977-08-18","current":false,"derived":true,"evidenceMineId":"1508625","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|P03329|1975-08-01|C02757|1975-08-01|60684"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06935","name":"Omega Mining Company Inc"},"object":{"type":"mine","id":"1508625","name":"No 1 Mine"},"validFrom":"1977-08-19","validTo":"1978-04-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|P06935|1977-08-19|1978-04-23"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01629","name":"Lawson Arthur Et Al"},"object":{"type":"mine","id":"1508625","name":"No 1 Mine"},"validFrom":"1977-08-19","validTo":"1978-04-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|C01629|1977-08-19|1978-04-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01629","name":"Lawson Arthur Et Al"},"object":{"type":"operator","id":"P06935","name":"Omega Mining Company Inc"},"validFrom":"1977-08-19","validTo":"1978-04-23","current":false,"derived":true,"evidenceMineId":"1508625","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|P06935|1977-08-19|C01629|1977-08-19|55384"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08058","name":"C & A Coal Company"},"object":{"type":"mine","id":"1508625","name":"No 1 Mine"},"validFrom":"1978-04-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|P08058|1978-04-24|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06496","name":"Combs Robert & Asbel Adkins"},"object":{"type":"mine","id":"1508625","name":"No 1 Mine"},"validFrom":"1978-04-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|C06496|1978-04-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06496","name":"Combs Robert & Asbel Adkins"},"object":{"type":"operator","id":"P08058","name":"C & A Coal Company"},"validFrom":"1978-04-24","validTo":null,"current":true,"derived":true,"evidenceMineId":"1508625","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508625|P08058|1978-04-24|C06496|1978-04-24|71977"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1508625","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"}}