{"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":"0900296","name":"North Ridge II"},"operator":{"type":"operator","id":"0082284","name":"North Ridge Granite Quarries Inc"},"controller":{"type":"controller","id":"0069431","name":"David A  Giannoni"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13810","name":"Service Granite Company Inc"},"object":{"type":"mine","id":"0900296","name":"North Ridge II"},"validFrom":"1950-01-01","validTo":"2006-05-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|L13810|1950-01-01|2006-05-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10542","name":"James Cleve  Miller et al"},"object":{"type":"mine","id":"0900296","name":"North Ridge II"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|M10542|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10542","name":"James Cleve  Miller et al"},"object":{"type":"operator","id":"L13810","name":"Service Granite Company Inc"},"validFrom":"1950-01-01","validTo":"2006-05-10","current":false,"derived":true,"evidenceMineId":"0900296","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|L13810|1950-01-01|M10542|1950-01-01|149436"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10542","name":"Carolyn J  Miller et al"},"object":{"type":"operator","id":"L13810","name":"Service Granite Company Inc"},"validFrom":"1950-01-01","validTo":"2006-05-10","current":false,"derived":true,"evidenceMineId":"0900296","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|L13810|1950-01-01|M10542|1950-01-01|149437"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0072343","name":"Lexington Blue Granite Inc"},"object":{"type":"mine","id":"0900296","name":"North Ridge II"},"validFrom":"2006-05-11","validTo":"2008-08-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|0072343|2006-05-11|2008-08-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0060589","name":"Carolyn J  Miller"},"object":{"type":"mine","id":"0900296","name":"North Ridge II"},"validFrom":"2006-05-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|0060589|2006-05-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0060589","name":"Carolyn J  Miller"},"object":{"type":"operator","id":"0072343","name":"Lexington Blue Granite Inc"},"validFrom":"2006-05-11","validTo":"2008-08-19","current":false,"derived":true,"evidenceMineId":"0900296","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|0072343|2006-05-11|0060589|2006-05-11|8072"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0069431","name":"David A  Giannoni"},"object":{"type":"mine","id":"0900296","name":"North Ridge II"},"validFrom":"2007-03-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|0069431|2007-03-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0082284","name":"North Ridge Granite Quarries Inc"},"object":{"type":"mine","id":"0900296","name":"North Ridge II"},"validFrom":"2008-08-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|0082284|2008-08-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0069431","name":"David A  Giannoni"},"object":{"type":"operator","id":"0082284","name":"North Ridge Granite Quarries Inc"},"validFrom":"2008-08-20","validTo":null,"current":true,"derived":true,"evidenceMineId":"0900296","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900296|0082284|2008-08-20|0069431|2007-03-28|9846"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0900296","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"}}