{"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":"2103786","name":"Fridgen Plant"},"operator":{"type":"operator","id":"0122251","name":"Fridgen Excavating & Tiling, LLC"},"controller":{"type":"controller","id":"0103815","name":"Tom J  Fridgen"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0103815","name":"Tom J  Fridgen"},"object":{"type":"mine","id":"2103786","name":"Fridgen Plant"},"validFrom":"2012-03-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103786|0103815|2012-03-14|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0122251","name":"Fridgen Excavating & Tiling, LLC"},"object":{"type":"mine","id":"2103786","name":"Fridgen Plant"},"validFrom":"2012-08-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103786|0122251|2012-08-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0103815","name":"Tom J  Fridgen"},"object":{"type":"operator","id":"0122251","name":"Fridgen Excavating & Tiling, LLC"},"validFrom":"2012-08-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"2103786","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103786|0122251|2012-08-30|0103815|2012-03-14|17918"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2103786","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"}}