{"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":"3606776","name":"Hamilton Strip #2"},"operator":{"type":"operator","id":"P16984","name":"Al Hamilton Contracting Company Inc"},"controller":{"type":"controller","id":"C00180","name":"C Alan  Walker"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03996","name":"Aldean  Hamilton"},"object":{"type":"mine","id":"3606776","name":"Hamilton Strip #2"},"validFrom":"1950-01-01","validTo":"1985-08-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606776|C03996|1950-01-01|1985-08-07"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04837","name":"Al Hamilton Contracting Company Inc"},"object":{"type":"mine","id":"3606776","name":"Hamilton Strip #2"},"validFrom":"1979-01-01","validTo":"1985-07-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606776|P04837|1979-01-01|1985-07-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03996","name":"Aldean  Hamilton"},"object":{"type":"operator","id":"P04837","name":"Al Hamilton Contracting Company Inc"},"validFrom":"1979-01-01","validTo":"1985-07-16","current":false,"derived":true,"evidenceMineId":"3606776","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606776|P04837|1979-01-01|C03996|1950-01-01|64511"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P16984","name":"Al Hamilton Contracting Company Inc"},"object":{"type":"mine","id":"3606776","name":"Hamilton Strip #2"},"validFrom":"1985-07-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606776|P16984|1985-07-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00180","name":"C Alan  Walker"},"object":{"type":"mine","id":"3606776","name":"Hamilton Strip #2"},"validFrom":"1985-07-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606776|C00180|1985-07-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00180","name":"C Alan  Walker"},"object":{"type":"operator","id":"P16984","name":"Al Hamilton Contracting Company Inc"},"validFrom":"1985-07-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"3606776","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606776|P16984|1985-07-17|C00180|1985-07-17|44723"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3606776","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"}}