{"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":"1515506","name":"Middle Fork Surface"},"operator":{"type":"operator","id":"0054617","name":"ICG Hazard, LLC"},"controller":{"type":"controller","id":"C15561","name":"Arch Resources Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10825","name":"Greg  Wells"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"1983-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|C10825|1983-12-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P15004","name":"Leslie Resources Inc"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"1986-01-01","validTo":"1998-03-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|P15004|1986-01-01|1998-03-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10825","name":"Greg  Wells"},"object":{"type":"operator","id":"P15004","name":"Leslie Resources Inc"},"validFrom":"1986-01-01","validTo":"1998-03-08","current":false,"derived":true,"evidenceMineId":"1515506","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|P15004|1986-01-01|C10825|1983-12-01|82860"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23905","name":"Leslie Resources Inc"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"1998-03-09","validTo":"2004-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|P23905|1998-03-09|2004-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"1998-03-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|C06656|1998-03-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"object":{"type":"operator","id":"P23905","name":"Leslie Resources Inc"},"validFrom":"1998-03-09","validTo":"2004-09-30","current":false,"derived":true,"evidenceMineId":"1515506","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|P23905|1998-03-09|C06656|1998-03-09|72564"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0055096","name":"LCC Kentucky LLC"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"2004-10-01","validTo":"2007-07-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|0055096|2004-10-01|2007-07-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0045767","name":"Lexington Coal Company LLC"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"2004-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|0045767|2004-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0045767","name":"Lexington Coal Company LLC"},"object":{"type":"operator","id":"0055096","name":"LCC Kentucky LLC"},"validFrom":"2004-10-01","validTo":"2007-07-19","current":false,"derived":true,"evidenceMineId":"1515506","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|0055096|2004-10-01|0045767|2004-10-01|5485"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0045307","name":"International Coal Group Inc (ICG)"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"2004-10-02","validTo":"2011-06-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|0045307|2004-10-02|2011-06-14"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0054617","name":"ICG Hazard, LLC"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"2007-07-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|0054617|2007-07-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0045307","name":"International Coal Group Inc (ICG)"},"object":{"type":"operator","id":"0054617","name":"ICG Hazard, LLC"},"validFrom":"2007-07-20","validTo":"2011-06-14","current":false,"derived":true,"evidenceMineId":"1515506","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|0054617|2007-07-20|0045307|2004-10-02|5292"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15561","name":"Arch Resources Inc"},"object":{"type":"mine","id":"1515506","name":"Middle Fork Surface"},"validFrom":"2011-06-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|C15561|2011-06-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15561","name":"Arch Resources Inc"},"object":{"type":"operator","id":"0054617","name":"ICG Hazard, LLC"},"validFrom":"2011-06-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"1515506","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515506|0054617|2007-07-20|C15561|2011-06-15|96145"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1515506","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"}}