{"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":"4609242","name":"West Fork Surface Mine No 1"},"operator":{"type":"operator","id":"P24027","name":"Alex Energy Inc."},"controller":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"1990-09-01","validTo":"2011-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|C02508|1990-09-01|2011-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15532","name":"Rag Aktiengesellschaft"},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"1995-06-01","validTo":"2004-07-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|C15532|1995-06-01|2004-07-29"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"1997-10-20","validTo":"2011-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|C02508|1997-10-20|2011-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0044281","name":"Foundation Coal Corporation"},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2004-07-30","validTo":"2009-07-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|0044281|2004-07-30|2009-07-30"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23152","name":"Laurel Creek Co., Inc."},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2007-11-07","validTo":"2009-07-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P23152|2007-11-07|2009-07-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0044281","name":"Foundation Coal Corporation"},"object":{"type":"operator","id":"P23152","name":"Laurel Creek Co., Inc."},"validFrom":"2007-11-07","validTo":"2009-07-19","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P23152|2007-11-07|0044281|2004-07-30|4995"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15532","name":"Rag Aktiengesellschaft"},"object":{"type":"operator","id":"P23152","name":"Laurel Creek Co., Inc."},"validFrom":"2007-11-07","validTo":"2004-07-29","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P23152|2007-11-07|C15532|1995-06-01|95863"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21118","name":"Aracoma Coal Company, Inc."},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2009-07-20","validTo":"2010-07-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P21118|2009-07-20|2010-07-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"operator","id":"P21118","name":"Aracoma Coal Company, Inc."},"validFrom":"2009-07-20","validTo":"2010-07-19","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P21118|2009-07-20|C02508|1990-09-01|59254"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2009-07-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|0041211|2009-07-31|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"P23152","name":"Laurel Creek Co., Inc."},"validFrom":"2009-07-31","validTo":"2009-07-19","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P23152|2007-11-07|0041211|2009-07-31|1800"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24027","name":"Alex Energy Inc."},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2010-07-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P24027|2010-07-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"operator","id":"P24027","name":"Alex Energy Inc."},"validFrom":"2010-07-20","validTo":"2011-05-31","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P24027|2010-07-20|C02508|1997-10-20|59497"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2011-06-01","validTo":"2016-07-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|0041211|2011-06-01|2016-07-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"P21118","name":"Aracoma Coal Company, Inc."},"validFrom":"2011-06-01","validTo":"2010-07-19","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P21118|2009-07-20|0041211|2011-06-01|2200"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"P24027","name":"Alex Energy Inc."},"validFrom":"2011-06-01","validTo":"2016-07-25","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P24027|2010-07-20|0041211|2011-06-01|2201"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2016-07-26","validTo":"2018-11-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|0127923|2016-07-26|2018-11-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"operator","id":"P21118","name":"Aracoma Coal Company, Inc."},"validFrom":"2016-07-26","validTo":"2010-07-19","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P21118|2009-07-20|0127923|2016-07-26|25295"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"operator","id":"P24027","name":"Alex Energy Inc."},"validFrom":"2016-07-26","validTo":"2018-11-08","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P24027|2010-07-20|0127923|2016-07-26|25296"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"object":{"type":"mine","id":"4609242","name":"West Fork Surface Mine No 1"},"validFrom":"2018-11-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|0127321|2018-11-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"object":{"type":"operator","id":"P21118","name":"Aracoma Coal Company, Inc."},"validFrom":"2018-11-09","validTo":"2010-07-19","current":false,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P21118|2009-07-20|0127321|2018-11-09|24930"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"object":{"type":"operator","id":"P24027","name":"Alex Energy Inc."},"validFrom":"2018-11-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"4609242","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609242|P24027|2010-07-20|0127321|2018-11-09|24931"}}],"coverage":{"historyRecords":11,"edgeCount":22,"intervalAnomalies":5,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4609242","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"}}