{"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":"2302359","name":"Buffalo Quarry"},"operator":{"type":"operator","id":"L14740","name":"T & M Stone Quarry LLC"},"controller":{"type":"controller","id":"M11215","name":"Leroy  Tarr; Wanda  Tarr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11215","name":"Leroy  Tarr et al"},"object":{"type":"mine","id":"2302359","name":"Buffalo Quarry"},"validFrom":"1996-04-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302359|M11215|1996-04-29|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14740","name":"T & M Stone Quarry LLC"},"object":{"type":"mine","id":"2302359","name":"Buffalo Quarry"},"validFrom":"2007-04-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302359|L14740|2007-04-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11215","name":"Leroy  Tarr et al"},"object":{"type":"operator","id":"L14740","name":"T & M Stone Quarry LLC"},"validFrom":"2007-04-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"2302359","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302359|L14740|2007-04-17|M11215|1996-04-29|150930"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11215","name":"Wanda  Tarr et al"},"object":{"type":"operator","id":"L14740","name":"T & M Stone Quarry LLC"},"validFrom":"2007-04-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"2302359","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302359|L14740|2007-04-17|M11215|1996-04-29|150931"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2302359","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"}}