{"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":"4604275","name":"Laurel Mt #1"},"operator":{"type":"operator","id":"P10244","name":"F & M Coal Company"},"controller":{"type":"controller","id":"C04388","name":"Frazee Donald F"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07890","name":"Weter Company Inc"},"object":{"type":"mine","id":"4604275","name":"Laurel Mt #1"},"validFrom":"1974-09-01","validTo":"1979-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604275|P07890|1974-09-01|1979-11-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04742","name":"Weter Howard"},"object":{"type":"mine","id":"4604275","name":"Laurel Mt #1"},"validFrom":"1974-09-01","validTo":"1979-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604275|C04742|1974-09-01|1979-11-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04742","name":"Weter Howard"},"object":{"type":"operator","id":"P07890","name":"Weter Company Inc"},"validFrom":"1974-09-01","validTo":"1979-11-13","current":false,"derived":true,"evidenceMineId":"4604275","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604275|P07890|1974-09-01|C04742|1974-09-01|66601"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10244","name":"F & M Coal Company"},"object":{"type":"mine","id":"4604275","name":"Laurel Mt #1"},"validFrom":"1979-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604275|P10244|1979-11-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04388","name":"Frazee Donald F Et Al"},"object":{"type":"mine","id":"4604275","name":"Laurel Mt #1"},"validFrom":"1979-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604275|C04388|1979-11-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04388","name":"Frazee Donald F Et Al"},"object":{"type":"operator","id":"P10244","name":"F & M Coal Company"},"validFrom":"1979-11-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"4604275","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604275|P10244|1979-11-14|C04388|1979-11-14|65861"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4604275","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"}}