{"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":"1516483","name":"Lanham Coal Dock"},"operator":{"type":"operator","id":"P22974","name":"Lanham Coal Dock"},"controller":{"type":"controller","id":"C14485","name":"Anthony V  Lanham"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1986-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|C06656|1986-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19884","name":"Iceland Terminal Inc"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1988-09-01","validTo":"1989-06-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P19884|1988-09-01|1989-06-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C09740","name":"Lanham John"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1988-09-01","validTo":"1989-06-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|C09740|1988-09-01|1989-06-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C09740","name":"Lanham John"},"object":{"type":"operator","id":"P19884","name":"Iceland Terminal Inc"},"validFrom":"1988-09-01","validTo":"1989-06-19","current":false,"derived":true,"evidenceMineId":"1516483","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P19884|1988-09-01|C09740|1988-09-01|80418"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17984","name":"Addwest Mining Inc"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1989-06-20","validTo":"1991-09-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P17984|1989-06-20|1991-09-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"object":{"type":"operator","id":"P17984","name":"Addwest Mining Inc"},"validFrom":"1989-06-20","validTo":"1991-09-05","current":false,"derived":true,"evidenceMineId":"1516483","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P17984|1989-06-20|C06656|1986-01-01|72456"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21610","name":"Marine Coal Sales Company"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1991-09-06","validTo":"1991-11-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P21610|1991-09-06|1991-11-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14467","name":"Miller Dick E & Conas Trading"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1991-09-06","validTo":"1991-11-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|C14467|1991-09-06|1991-11-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14467","name":"Miller Dick E & Conas Trading"},"object":{"type":"operator","id":"P21610","name":"Marine Coal Sales Company"},"validFrom":"1991-09-06","validTo":"1991-11-26","current":false,"derived":true,"evidenceMineId":"1516483","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P21610|1991-09-06|C14467|1991-09-06|92968"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17984","name":"Addwest Mining Inc"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1991-11-27","validTo":"1994-12-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P17984|1991-11-27|1994-12-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"object":{"type":"operator","id":"P17984","name":"Addwest Mining Inc"},"validFrom":"1991-11-27","validTo":"1994-12-05","current":false,"derived":true,"evidenceMineId":"1516483","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P17984|1991-11-27|C06656|1986-01-01|72457"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22974","name":"Lanham Coal Dock"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1994-12-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P22974|1994-12-06|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14485","name":"Anthony V  Lanham"},"object":{"type":"mine","id":"1516483","name":"Lanham Coal Dock"},"validFrom":"1994-12-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|C14485|1994-12-06|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14485","name":"Anthony V  Lanham"},"object":{"type":"operator","id":"P22974","name":"Lanham Coal Dock"},"validFrom":"1994-12-06","validTo":null,"current":true,"derived":true,"evidenceMineId":"1516483","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516483|P22974|1994-12-06|C14485|1994-12-06|93006"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1516483","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"}}