{"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":"1513552","name":"#2 Strip"},"operator":{"type":"operator","id":"P24022","name":"Straight Creek Coal Resources Company"},"controller":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06148","name":"Cyprus Amax Minerals Company"},"object":{"type":"mine","id":"1513552","name":"#2 Strip"},"validFrom":"1981-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513552|C06148|1981-09-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P20376","name":"Cyprus Cumberland Coal Corp"},"object":{"type":"mine","id":"1513552","name":"#2 Strip"},"validFrom":"1982-06-01","validTo":"1998-06-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513552|P20376|1982-06-01|1998-06-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06148","name":"Cyprus Amax Minerals Company"},"object":{"type":"operator","id":"P20376","name":"Cyprus Cumberland Coal Corp"},"validFrom":"1982-06-01","validTo":"1998-06-28","current":false,"derived":true,"evidenceMineId":"1513552","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513552|P20376|1982-06-01|C06148|1981-09-01|70948"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24022","name":"Straight Creek Coal Resources Company"},"object":{"type":"mine","id":"1513552","name":"#2 Strip"},"validFrom":"1998-06-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513552|P24022|1998-06-29|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"object":{"type":"mine","id":"1513552","name":"#2 Strip"},"validFrom":"1998-06-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513552|C06656|1998-06-29|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06656","name":"Horizon Natural Resources Incorporated"},"object":{"type":"operator","id":"P24022","name":"Straight Creek Coal Resources Company"},"validFrom":"1998-06-29","validTo":null,"current":true,"derived":true,"evidenceMineId":"1513552","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513552|P24022|1998-06-29|C06656|1998-06-29|72595"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1513552","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"}}