{"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":"4801475","name":"GLENROCK MILL"},"operator":{"type":"operator","id":"L09648","name":"Black Hills Lignite A Limited Liability Co"},"controller":{"type":"controller","id":"0198141","name":"Harvest Holdings II LLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09648","name":"Black Hills Lignite A Limited Liability Co"},"object":{"type":"mine","id":"4801475","name":"GLENROCK MILL"},"validFrom":"1987-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|L09648|1987-08-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07534","name":"Thomas A  Thorson et al"},"object":{"type":"mine","id":"4801475","name":"GLENROCK MILL"},"validFrom":"1987-08-01","validTo":"2020-01-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|M07534|1987-08-01|2020-01-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07534","name":"Thomas A  Thorson et al"},"object":{"type":"operator","id":"L09648","name":"Black Hills Lignite A Limited Liability Co"},"validFrom":"1987-08-01","validTo":"2020-01-16","current":false,"derived":true,"evidenceMineId":"4801475","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|L09648|1987-08-01|M07534|1987-08-01|141461"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0053829","name":"Michael  Farmar et al"},"object":{"type":"mine","id":"4801475","name":"GLENROCK MILL"},"validFrom":"2020-01-17","validTo":"2025-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|0053829|2020-01-17|2025-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0053829","name":"Michael  Farmar et al"},"object":{"type":"operator","id":"L09648","name":"Black Hills Lignite A Limited Liability Co"},"validFrom":"2020-01-17","validTo":"2025-06-30","current":false,"derived":true,"evidenceMineId":"4801475","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|L09648|1987-08-01|0053829|2020-01-17|6903"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0053829","name":"Brad  Knickel et al"},"object":{"type":"operator","id":"L09648","name":"Black Hills Lignite A Limited Liability Co"},"validFrom":"2020-01-17","validTo":"2025-06-30","current":false,"derived":true,"evidenceMineId":"4801475","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|L09648|1987-08-01|0053829|2020-01-17|6904"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0198141","name":"Harvest Holdings II LLC"},"object":{"type":"mine","id":"4801475","name":"GLENROCK MILL"},"validFrom":"2025-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|0198141|2025-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0198141","name":"Harvest Holdings II LLC"},"object":{"type":"operator","id":"L09648","name":"Black Hills Lignite A Limited Liability Co"},"validFrom":"2025-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4801475","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801475|L09648|1987-08-01|0198141|2025-07-01|42241"}}],"coverage":{"historyRecords":4,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4801475","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"}}