{"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":"1518716","name":"Hatfield Gap Surface Mine"},"operator":{"type":"operator","id":"0101385","name":"TackettCreek Mining, Inc."},"controller":{"type":"controller","id":"0085635","name":"Timothy W  Evans Sr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06375","name":"Dan  Chambers et al"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"1983-09-01","validTo":"2013-10-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|C06375|1983-09-01|2013-10-06"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11799","name":"Frank H  Ikerd III"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2003-02-06","validTo":"2005-06-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|C11799|2003-02-06|2005-06-09"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051029","name":"Ikerd Coal Company LLC"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2004-02-09","validTo":"2007-01-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0051029|2004-02-09|2007-01-07"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11799","name":"Frank H  Ikerd III"},"object":{"type":"operator","id":"0051029","name":"Ikerd Coal Company LLC"},"validFrom":"2004-02-09","validTo":"2005-06-09","current":false,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0051029|2004-02-09|C11799|2003-02-06|85450"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042777","name":"Timothy L  Webb"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2005-06-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0042777|2005-06-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042777","name":"Timothy L  Webb"},"object":{"type":"operator","id":"0051029","name":"Ikerd Coal Company LLC"},"validFrom":"2005-06-10","validTo":"2007-01-07","current":false,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0051029|2004-02-09|0042777|2005-06-10|4310"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042777","name":"Timothy L  Webb"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2006-03-22","validTo":"2007-01-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0042777|2006-03-22|2007-01-07"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0069423","name":"Specialty Coal Processing Inc."},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2007-01-08","validTo":"2007-11-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0069423|2007-01-08|2007-11-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042777","name":"Timothy L  Webb"},"object":{"type":"operator","id":"0069423","name":"Specialty Coal Processing Inc."},"validFrom":"2007-01-08","validTo":"2007-01-07","current":false,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0069423|2007-01-08|0042777|2006-03-22|4313"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0057409","name":"James  Cox et al"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2007-01-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0057409|2007-01-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0057409","name":"James  Cox et al"},"object":{"type":"operator","id":"0069423","name":"Specialty Coal Processing Inc."},"validFrom":"2007-01-08","validTo":"2007-11-15","current":false,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0069423|2007-01-08|0057409|2007-01-08|7612"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P14783","name":"Mountainside Coal Co"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2007-11-16","validTo":"2017-03-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|P14783|2007-11-16|2017-03-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06375","name":"Dan  Chambers et al"},"object":{"type":"operator","id":"P14783","name":"Mountainside Coal Co"},"validFrom":"2007-11-16","validTo":"2013-10-06","current":false,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|P14783|2007-11-16|C06375|1983-09-01|71644"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0085635","name":"Timothy W  Evans Sr"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2009-05-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0085635|2009-05-20|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0110723","name":"River Energy JV UK Limited"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2013-10-07","validTo":"2021-04-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0110723|2013-10-07|2021-04-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0110723","name":"River Energy JV UK Limited"},"object":{"type":"operator","id":"P14783","name":"Mountainside Coal Co"},"validFrom":"2013-10-07","validTo":"2017-03-15","current":false,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|P14783|2007-11-16|0110723|2013-10-07|20293"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0101385","name":"TackettCreek Mining, Inc."},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2017-03-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0101385|2017-03-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0085635","name":"Timothy W  Evans Sr"},"object":{"type":"operator","id":"0101385","name":"TackettCreek Mining, Inc."},"validFrom":"2017-03-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0101385|2017-03-16|0085635|2009-05-20|13675"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0162021","name":"Damian  Caldwell"},"object":{"type":"mine","id":"1518716","name":"Hatfield Gap Surface Mine"},"validFrom":"2021-04-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|0162021|2021-04-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0162021","name":"Damian  Caldwell"},"object":{"type":"operator","id":"P14783","name":"Mountainside Coal Co"},"validFrom":"2021-04-16","validTo":"2017-03-15","current":false,"derived":true,"evidenceMineId":"1518716","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1518716|P14783|2007-11-16|0162021|2021-04-16|33932"}}],"coverage":{"historyRecords":8,"edgeCount":20,"intervalAnomalies":2,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1518716","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"}}