{"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":"3401318","name":"Keeler Quarry And Plant"},"operator":{"type":"operator","id":"L05547","name":"Keeler Quarry"},"controller":{"type":"controller","id":"M04479","name":"Keeler Bruce"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00206","name":"James D  Schwarck"},"object":{"type":"mine","id":"3401318","name":"Keeler Quarry And Plant"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3401318|M00206|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02948","name":"Schwarck Quarries Inc"},"object":{"type":"mine","id":"3401318","name":"Keeler Quarry And Plant"},"validFrom":"1981-05-01","validTo":"1981-09-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3401318|L02948|1981-05-01|1981-09-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00206","name":"James D  Schwarck"},"object":{"type":"operator","id":"L02948","name":"Schwarck Quarries Inc"},"validFrom":"1981-05-01","validTo":"1981-09-22","current":false,"derived":true,"evidenceMineId":"3401318","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3401318|L02948|1981-05-01|M00206|1950-01-01|107416"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05547","name":"Keeler Quarry"},"object":{"type":"mine","id":"3401318","name":"Keeler Quarry And Plant"},"validFrom":"1981-09-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3401318|L05547|1981-09-23|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04479","name":"Keeler Bruce"},"object":{"type":"mine","id":"3401318","name":"Keeler Quarry And Plant"},"validFrom":"1981-09-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3401318|M04479|1981-09-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04479","name":"Keeler Bruce"},"object":{"type":"operator","id":"L05547","name":"Keeler Quarry"},"validFrom":"1981-09-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"3401318","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3401318|L05547|1981-09-23|M04479|1981-09-23|132094"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3401318","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"}}