{"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":"2026-10-17T05:35:58.500035+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":"1800759","name":"Knox Dimension Stone Quarry"},"operator":{"type":"operator","id":"0051212","name":"Garrett County Peat Products LLC"},"controller":{"type":"controller","id":"0041633","name":"Carroll O (Jack)  Beitzel; Jone E  Beitzel"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051212","name":"Garrett County Peat Products LLC"},"object":{"type":"mine","id":"1800759","name":"Knox Dimension Stone Quarry"},"validFrom":"2003-04-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1800759|0051212|2003-04-03|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041633","name":"Jone E  Beitzel  et al"},"object":{"type":"mine","id":"1800759","name":"Knox Dimension Stone Quarry"},"validFrom":"2003-04-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1800759|0041633|2003-04-03|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041633","name":"Jone E  Beitzel  et al"},"object":{"type":"operator","id":"0051212","name":"Garrett County Peat Products LLC"},"validFrom":"2003-04-03","validTo":null,"current":true,"derived":true,"evidenceMineId":"1800759","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1800759|0051212|2003-04-03|0041633|2003-04-03|2835"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041633","name":"Carroll O (Jack)  Beitzel  et al"},"object":{"type":"operator","id":"0051212","name":"Garrett County Peat Products LLC"},"validFrom":"2003-04-03","validTo":null,"current":true,"derived":true,"evidenceMineId":"1800759","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1800759|0051212|2003-04-03|0041633|2003-04-03|2836"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1800759","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}