{"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":"3606613","name":"Black Mt Mine"},"operator":{"type":"operator","id":"P17792","name":"Black Mountain Mining Company"},"controller":{"type":"controller","id":"C01086","name":"Donald A  Soberdash"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02160","name":"Marmon Group Inc"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1974-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|C02160|1974-10-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07843","name":"Penn Pocahontas Coal Company"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1978-03-01","validTo":"1986-04-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P07843|1978-03-01|1986-04-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02160","name":"Marmon Group Inc"},"object":{"type":"operator","id":"P07843","name":"Penn Pocahontas Coal Company"},"validFrom":"1978-03-01","validTo":"1986-04-14","current":false,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P07843|1978-03-01|C02160|1974-10-01|57649"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17792","name":"Black Mountain Mining Company"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1986-04-15","validTo":"1986-08-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P17792|1986-04-15|1986-08-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01086","name":"Donald A  Soberdash"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1986-04-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|C01086|1986-04-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01086","name":"Donald A  Soberdash"},"object":{"type":"operator","id":"P17792","name":"Black Mountain Mining Company"},"validFrom":"1986-04-15","validTo":"1986-08-12","current":false,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P17792|1986-04-15|C01086|1986-04-15|52166"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18080","name":"Black Mountain Mining Inc"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1986-08-13","validTo":"1987-01-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P18080|1986-08-13|1987-01-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10981","name":"Keslar Robert S"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1986-08-13","validTo":"1987-01-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|C10981|1986-08-13|1987-01-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10981","name":"Keslar Robert S"},"object":{"type":"operator","id":"P18080","name":"Black Mountain Mining Inc"},"validFrom":"1986-08-13","validTo":"1987-01-05","current":false,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P18080|1986-08-13|C10981|1986-08-13|83289"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18311","name":"Pierpont Mining Inc"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1987-01-06","validTo":"1987-02-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P18311|1987-01-06|1987-02-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03313","name":"Forman Loyal Jr & Robert Lose"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1987-01-06","validTo":"1987-02-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|C03313|1987-01-06|1987-02-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03313","name":"Forman Loyal Jr & Robert Lose"},"object":{"type":"operator","id":"P18311","name":"Pierpont Mining Inc"},"validFrom":"1987-01-06","validTo":"1987-02-01","current":false,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P18311|1987-01-06|C03313|1987-01-06|62460"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19222","name":"Top Grade Fuels Inc"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1987-02-02","validTo":"1996-01-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P19222|1987-02-02|1996-01-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01086","name":"Donald A  Soberdash"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1987-02-02","validTo":"1996-01-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|C01086|1987-02-02|1996-01-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01086","name":"Donald A  Soberdash"},"object":{"type":"operator","id":"P19222","name":"Top Grade Fuels Inc"},"validFrom":"1987-02-02","validTo":"1996-01-15","current":false,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P19222|1987-02-02|C01086|1987-02-02|52168"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23299","name":"Fox Mining Company Inc"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1996-01-16","validTo":"1996-08-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P23299|1996-01-16|1996-08-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15341","name":"Alvin E  Naugle Jr"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1996-01-16","validTo":"1996-08-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|C15341|1996-01-16|1996-08-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15341","name":"Alvin E  Naugle Jr"},"object":{"type":"operator","id":"P23299","name":"Fox Mining Company Inc"},"validFrom":"1996-01-16","validTo":"1996-08-12","current":false,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P23299|1996-01-16|C15341|1996-01-16|95372"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23532","name":"Fox Mining Company Inc"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1996-08-13","validTo":"1998-05-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P23532|1996-08-13|1998-05-04"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15466","name":"Timothy R  Mowry"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1996-08-13","validTo":"1998-05-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|C15466|1996-08-13|1998-05-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15466","name":"Timothy R  Mowry"},"object":{"type":"operator","id":"P23532","name":"Fox Mining Company Inc"},"validFrom":"1996-08-13","validTo":"1998-05-04","current":false,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P23532|1996-08-13|C15466|1996-08-13|95712"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17792","name":"Black Mountain Mining Company"},"object":{"type":"mine","id":"3606613","name":"Black Mt Mine"},"validFrom":"1998-05-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P17792|1998-05-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01086","name":"Donald A  Soberdash"},"object":{"type":"operator","id":"P17792","name":"Black Mountain Mining Company"},"validFrom":"1998-05-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"3606613","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606613|P17792|1998-05-05|C01086|1986-04-15|52167"}}],"coverage":{"historyRecords":8,"edgeCount":23,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3606613","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"}}