{"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":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"operator":{"type":"operator","id":"P21315","name":"Black Mountain Coal Mining Company Inc"},"controller":{"type":"controller","id":"C14325","name":"Phipps William"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13033","name":"Mize Lanious & Jackie Et Al"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1987-06-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|C13033|1987-06-19|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19488","name":"Four A Coal Company"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1988-05-01","validTo":"1990-10-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P19488|1988-05-01|1990-10-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10612","name":"Asbury Charles M - Gary Asher Et Al"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1988-05-01","validTo":"1991-02-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|C10612|1988-05-01|1991-02-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10612","name":"Asbury Charles M - Gary Asher Et Al"},"object":{"type":"operator","id":"P19488","name":"Four A Coal Company"},"validFrom":"1988-05-01","validTo":"1990-10-28","current":false,"derived":true,"evidenceMineId":"1516372","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P19488|1988-05-01|C10612|1988-05-01|82439"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18785","name":"L & J Coal Company Inc"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1990-10-29","validTo":"1992-06-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P18785|1990-10-29|1992-06-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13033","name":"Mize Lanious & Jackie Et Al"},"object":{"type":"operator","id":"P18785","name":"L & J Coal Company Inc"},"validFrom":"1990-10-29","validTo":"1992-06-21","current":false,"derived":true,"evidenceMineId":"1516372","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P18785|1990-10-29|C13033|1987-06-19|88480"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14325","name":"Phipps William"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1991-02-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|C14325|1991-02-04|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21965","name":"Crystal Energy Inc"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1992-06-22","validTo":"1993-02-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P21965|1992-06-22|1993-02-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12755","name":"Darrell  Wagner"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1992-06-22","validTo":"1993-02-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|C12755|1992-06-22|1993-02-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12755","name":"Darrell  Wagner"},"object":{"type":"operator","id":"P21965","name":"Crystal Energy Inc"},"validFrom":"1992-06-22","validTo":"1993-02-22","current":false,"derived":true,"evidenceMineId":"1516372","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P21965|1992-06-22|C12755|1992-06-22|87832"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21315","name":"Black Mountain Coal Mining Company Inc"},"object":{"type":"mine","id":"1516372","name":"Black Mtn Coal Mng Co Mine #2"},"validFrom":"1993-02-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P21315|1993-02-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14325","name":"Phipps William"},"object":{"type":"operator","id":"P21315","name":"Black Mountain Coal Mining Company Inc"},"validFrom":"1993-02-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"1516372","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1516372|P21315|1993-02-23|C14325|1991-02-04|92519"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1516372","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"}}