{"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":"2002744","name":"El Jay Plant #1"},"operator":{"type":"operator","id":"L13294","name":"West Side Aggregates Inc"},"controller":{"type":"controller","id":"M10155","name":"Walker William R & J C Storie"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08898","name":"Associated Aggregates Inc"},"object":{"type":"mine","id":"2002744","name":"El Jay Plant #1"},"validFrom":"1986-03-01","validTo":"1993-08-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2002744|L08898|1986-03-01|1993-08-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07034","name":"Joel  Garett"},"object":{"type":"mine","id":"2002744","name":"El Jay Plant #1"},"validFrom":"1986-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2002744|M07034|1986-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07034","name":"Joel  Garett"},"object":{"type":"operator","id":"L08898","name":"Associated Aggregates Inc"},"validFrom":"1986-03-01","validTo":"1993-08-25","current":false,"derived":true,"evidenceMineId":"2002744","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2002744|L08898|1986-03-01|M07034|1986-03-01|139928"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13294","name":"West Side Aggregates Inc"},"object":{"type":"mine","id":"2002744","name":"El Jay Plant #1"},"validFrom":"1993-08-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2002744|L13294|1993-08-26|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10155","name":"Walker William R & J C Storie"},"object":{"type":"mine","id":"2002744","name":"El Jay Plant #1"},"validFrom":"1993-08-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2002744|M10155|1993-08-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10155","name":"Walker William R & J C Storie"},"object":{"type":"operator","id":"L13294","name":"West Side Aggregates Inc"},"validFrom":"1993-08-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"2002744","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2002744|L13294|1993-08-26|M10155|1993-08-26|148528"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2002744","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"}}