{"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":"1600907","name":"Browning Pit"},"operator":{"type":"operator","id":"L03463","name":"D & J Sand & Gravel"},"controller":{"type":"controller","id":"M02777","name":"Richardson R D"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03462","name":"H & M Dirt Company"},"object":{"type":"mine","id":"1600907","name":"Browning Pit"},"validFrom":"1950-01-01","validTo":"1979-10-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1600907|L03462|1950-01-01|1979-10-02"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02776","name":"Mathis George & Felton Hart"},"object":{"type":"mine","id":"1600907","name":"Browning Pit"},"validFrom":"1950-01-01","validTo":"1979-10-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1600907|M02776|1950-01-01|1979-10-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02776","name":"Mathis George & Felton Hart"},"object":{"type":"operator","id":"L03462","name":"H & M Dirt Company"},"validFrom":"1950-01-01","validTo":"1979-10-02","current":false,"derived":true,"evidenceMineId":"1600907","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1600907|L03462|1950-01-01|M02776|1950-01-01|126858"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03463","name":"D & J Sand & Gravel"},"object":{"type":"mine","id":"1600907","name":"Browning Pit"},"validFrom":"1979-10-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1600907|L03463|1979-10-03|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02777","name":"Richardson R D"},"object":{"type":"mine","id":"1600907","name":"Browning Pit"},"validFrom":"1979-10-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1600907|M02777|1979-10-03|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02777","name":"Richardson R D"},"object":{"type":"operator","id":"L03463","name":"D & J Sand & Gravel"},"validFrom":"1979-10-03","validTo":null,"current":true,"derived":true,"evidenceMineId":"1600907","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1600907|L03463|1979-10-03|M02777|1979-10-03|126859"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1600907","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"}}