{"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":"2026-10-17T05:35:58.500035+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":"1518912","name":"Island Dock"},"operator":{"type":"operator","id":"P22938","name":"KenAmerican Resources, Inc."},"controller":{"type":"controller","id":"C13408","name":"Robert E  Murray"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04188","name":"Donald E  Bowles"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"1977-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|C04188|1977-06-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13408","name":"Robert E  Murray"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"1994-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|C13408|1994-10-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06161","name":"Charolais Corporation"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"2005-07-29","validTo":"2006-12-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|P06161|2005-07-29|2006-12-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04188","name":"Donald E  Bowles"},"object":{"type":"operator","id":"P06161","name":"Charolais Corporation"},"validFrom":"2005-07-29","validTo":"2006-12-26","current":false,"derived":true,"evidenceMineId":"1518912","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|P06161|2005-07-29|C04188|1977-06-01|65094"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0061369","name":"Phoenix Coal Corporation"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"2006-12-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|0061369|2006-12-22|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0077463","name":"Phoenix Coal Processing Company LLC"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"2006-12-27","validTo":"2009-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|0077463|2006-12-27|2009-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0061369","name":"Phoenix Coal Corporation"},"object":{"type":"operator","id":"0077463","name":"Phoenix Coal Processing Company LLC"},"validFrom":"2006-12-27","validTo":"2009-09-30","current":false,"derived":true,"evidenceMineId":"1518912","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|0077463|2006-12-27|0061369|2006-12-22|8200"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0104786","name":"Oxford Mining Company-Kentucky, LLC"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"2009-10-01","validTo":"2014-04-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|0104786|2009-10-01|2014-04-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04381","name":"Charles C  Ungurean"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"2009-10-01","validTo":"2014-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|C04381|2009-10-01|2014-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04381","name":"Charles C  Ungurean"},"object":{"type":"operator","id":"0104786","name":"Oxford Mining Company-Kentucky, LLC"},"validFrom":"2009-10-01","validTo":"2014-04-10","current":false,"derived":true,"evidenceMineId":"1518912","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|0104786|2009-10-01|C04381|2009-10-01|65843"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22938","name":"KenAmerican Resources, Inc."},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"2014-04-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|P22938|2014-04-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13408","name":"Robert E  Murray"},"object":{"type":"operator","id":"P22938","name":"KenAmerican Resources, Inc."},"validFrom":"2014-04-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"1518912","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|P22938|2014-04-11|C13408|1994-10-01|89582"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01550","name":"Westmoreland Coal Company"},"object":{"type":"mine","id":"1518912","name":"Island Dock"},"validFrom":"2015-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|C01550|2015-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01550","name":"Westmoreland Coal Company"},"object":{"type":"operator","id":"0104786","name":"Oxford Mining Company-Kentucky, LLC"},"validFrom":"2015-01-01","validTo":"2014-04-10","current":false,"derived":true,"evidenceMineId":"1518912","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518912|0104786|2009-10-01|C01550|2015-01-01|54907"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1518912","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}