{"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":"0301472","name":"SAC Sand & Gravel"},"operator":{"type":"operator","id":"0125074","name":"SAC Sand & Gravel"},"controller":{"type":"controller","id":"0106263","name":"Roth (John)  Horner III"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L32092","name":"SAC Sand & Gravel"},"object":{"type":"mine","id":"0301472","name":"SAC Sand & Gravel"},"validFrom":"1980-01-01","validTo":"2012-09-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301472|L32092|1980-01-01|2012-09-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M32092","name":"Donald J  Cook et al"},"object":{"type":"mine","id":"0301472","name":"SAC Sand & Gravel"},"validFrom":"1980-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301472|M32092|1980-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M32092","name":"Donald J  Cook et al"},"object":{"type":"operator","id":"L32092","name":"SAC Sand & Gravel"},"validFrom":"1980-01-01","validTo":"2012-09-26","current":false,"derived":true,"evidenceMineId":"0301472","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301472|L32092|1980-01-01|M32092|1980-01-01|160518"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0125074","name":"SAC Sand & Gravel"},"object":{"type":"mine","id":"0301472","name":"SAC Sand & Gravel"},"validFrom":"2012-09-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301472|0125074|2012-09-27|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0106263","name":"Roth (John)  Horner III"},"object":{"type":"mine","id":"0301472","name":"SAC Sand & Gravel"},"validFrom":"2012-09-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301472|0106263|2012-09-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0106263","name":"Roth (John)  Horner III"},"object":{"type":"operator","id":"0125074","name":"SAC Sand & Gravel"},"validFrom":"2012-09-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"0301472","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0301472|0125074|2012-09-27|0106263|2012-09-27|18768"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0301472","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"}}