{"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":"1502085","name":"HZ4-1"},"operator":{"type":"operator","id":"P24542","name":"Perry County Coal Corporation"},"controller":{"type":"controller","id":"0150901","name":"American Resources Corporation"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00172","name":"E A S Coal Company"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"1950-01-01","validTo":"1983-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P00172|1950-01-01|1983-02-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00116","name":"Elmer  Whitaker"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"1950-01-01","validTo":"1983-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|C00116|1950-01-01|1983-02-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00116","name":"Elmer  Whitaker"},"object":{"type":"operator","id":"P00172","name":"E A S Coal Company"},"validFrom":"1950-01-01","validTo":"1983-02-28","current":false,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P00172|1950-01-01|C00116|1950-01-01|44281"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P15495","name":"Whitaker Coal Corp"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"1983-03-01","validTo":"1996-09-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P15495|1983-03-01|1996-09-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01767","name":"Sunoco, Inc."},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"1983-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|C01767|1983-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01767","name":"Sunoco, Inc."},"object":{"type":"operator","id":"P15495","name":"Whitaker Coal Corp"},"validFrom":"1983-03-01","validTo":"1996-09-03","current":false,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P15495|1983-03-01|C01767|1983-03-01|55974"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11343","name":"Rex  Fought"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"1989-03-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|C11343|1989-03-21|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24352","name":"Perry County Coal Corp"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"1996-09-04","validTo":"2000-11-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P24352|1996-09-04|2000-11-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15491","name":"Edward L Clemons Estate et al"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"1996-09-04","validTo":"2001-01-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|C15491|1996-09-04|2001-01-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15491","name":"Edward L Clemons Estate et al"},"object":{"type":"operator","id":"P24352","name":"Perry County Coal Corp"},"validFrom":"1996-09-04","validTo":"2000-11-14","current":false,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P24352|1996-09-04|C15491|1996-09-04|95766"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P20125","name":"Aero Energy Inc"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"2000-11-15","validTo":"2001-09-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P20125|2000-11-15|2001-09-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11343","name":"Rex  Fought"},"object":{"type":"operator","id":"P20125","name":"Aero Energy Inc"},"validFrom":"2000-11-15","validTo":"2001-09-23","current":false,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P20125|2000-11-15|C11343|1989-03-21|84384"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00286","name":"TECO Energy Inc"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"2000-11-17","validTo":"2015-09-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|C00286|2000-11-17|2015-09-20"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24542","name":"Perry County Coal Corporation"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"2001-09-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P24542|2001-09-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00286","name":"TECO Energy Inc"},"object":{"type":"operator","id":"P24542","name":"Perry County Coal Corporation"},"validFrom":"2001-09-24","validTo":"2015-09-20","current":false,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P24542|2001-09-24|C00286|2000-11-17|45874"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0120801","name":"Cambrian Coal Corp"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"2015-09-21","validTo":"2019-06-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|0120801|2015-09-21|2019-06-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0120801","name":"Cambrian Coal Corp"},"object":{"type":"operator","id":"P24542","name":"Perry County Coal Corporation"},"validFrom":"2015-09-21","validTo":"2019-06-15","current":false,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P24542|2001-09-24|0120801|2015-09-21|23536"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0149203","name":"J Mark  Campbell"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"2019-06-16","validTo":"2019-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|0149203|2019-06-16|2019-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0149203","name":"J Mark  Campbell"},"object":{"type":"operator","id":"P24542","name":"Perry County Coal Corporation"},"validFrom":"2019-06-16","validTo":"2019-09-30","current":false,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P24542|2001-09-24|0149203|2019-06-16|30518"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0150901","name":"American Resources Corporation"},"object":{"type":"mine","id":"1502085","name":"HZ4-1"},"validFrom":"2019-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|0150901|2019-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0150901","name":"American Resources Corporation"},"object":{"type":"operator","id":"P24542","name":"Perry County Coal Corporation"},"validFrom":"2019-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1502085","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502085|P24542|2001-09-24|0150901|2019-10-01|31149"}}],"coverage":{"historyRecords":8,"edgeCount":21,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1502085","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"}}