{"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":"2026-10-18T09:31:49.615908+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":"0901172","name":"Cow Creek Sand Mine Plant 7"},"operator":{"type":"operator","id":"0145494","name":"Rountree Construction Company"},"controller":{"type":"controller","id":"0125883","name":"Zachary  Rountree"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M38004","name":"Bill  Rountree"},"object":{"type":"mine","id":"0901172","name":"Cow Creek Sand Mine Plant 7"},"validFrom":"2002-12-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0901172|M38004|2002-12-10|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051712","name":"Rountree Materials, Inc."},"object":{"type":"mine","id":"0901172","name":"Cow Creek Sand Mine Plant 7"},"validFrom":"2006-08-15","validTo":"2016-05-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0901172|0051712|2006-08-15|2016-05-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M38004","name":"Bill  Rountree"},"object":{"type":"operator","id":"0051712","name":"Rountree Materials, Inc."},"validFrom":"2006-08-15","validTo":"2016-05-26","current":false,"derived":true,"evidenceMineId":"0901172","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0901172|0051712|2006-08-15|M38004|2002-12-10|167371"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0145494","name":"Rountree Construction Company"},"object":{"type":"mine","id":"0901172","name":"Cow Creek Sand Mine Plant 7"},"validFrom":"2016-05-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0901172|0145494|2016-05-27|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0125883","name":"Zachary  Rountree"},"object":{"type":"mine","id":"0901172","name":"Cow Creek Sand Mine Plant 7"},"validFrom":"2016-05-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0901172|0125883|2016-05-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0125883","name":"Zachary  Rountree"},"object":{"type":"operator","id":"0145494","name":"Rountree Construction Company"},"validFrom":"2016-05-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"0901172","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0901172|0145494|2016-05-27|0125883|2016-05-27|24427"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0901172","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}