{"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":"4503628","name":"Ronald Sand & Gravel"},"operator":{"type":"operator","id":"0080304","name":"Ronald Sand & Gravel"},"controller":{"type":"controller","id":"0118881","name":"Kristin  Gibson; Kory  Gibson"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0080304","name":"Ronald Sand & Gravel"},"object":{"type":"mine","id":"4503628","name":"Ronald Sand & Gravel"},"validFrom":"2007-03-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503628|0080304|2007-03-21|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0067511","name":"Louie H.  Gibson"},"object":{"type":"mine","id":"4503628","name":"Ronald Sand & Gravel"},"validFrom":"2007-03-21","validTo":"2015-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503628|0067511|2007-03-21|2015-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0067511","name":"Louie H.  Gibson"},"object":{"type":"operator","id":"0080304","name":"Ronald Sand & Gravel"},"validFrom":"2007-03-21","validTo":"2015-06-30","current":false,"derived":true,"evidenceMineId":"4503628","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503628|0080304|2007-03-21|0067511|2007-03-21|9471"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0118881","name":"Kristin  Gibson et al"},"object":{"type":"mine","id":"4503628","name":"Ronald Sand & Gravel"},"validFrom":"2015-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503628|0118881|2015-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0118881","name":"Kristin  Gibson et al"},"object":{"type":"operator","id":"0080304","name":"Ronald Sand & Gravel"},"validFrom":"2015-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4503628","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503628|0080304|2007-03-21|0118881|2015-07-01|22758"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0118881","name":"Kory  Gibson et al"},"object":{"type":"operator","id":"0080304","name":"Ronald Sand & Gravel"},"validFrom":"2015-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4503628","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503628|0080304|2007-03-21|0118881|2015-07-01|22759"}}],"coverage":{"historyRecords":3,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4503628","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"}}