{"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":"3002402","name":"Macedon Plant"},"operator":{"type":"operator","id":"L05657","name":"Regional Sand & Gravel Inc"},"controller":{"type":"controller","id":"M04569","name":"Joseph  Spezio"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03386","name":"S-S Gravel Operation"},"object":{"type":"mine","id":"3002402","name":"Macedon Plant"},"validFrom":"1979-01-01","validTo":"1983-01-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|L03386|1979-01-01|1983-01-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02709","name":"Siebert Harvey E & Joseph Spezio"},"object":{"type":"mine","id":"3002402","name":"Macedon Plant"},"validFrom":"1979-01-01","validTo":"1983-01-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|M02709|1979-01-01|1983-01-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02709","name":"Siebert Harvey E & Joseph Spezio"},"object":{"type":"operator","id":"L03386","name":"S-S Gravel Operation"},"validFrom":"1979-01-01","validTo":"1983-01-18","current":false,"derived":true,"evidenceMineId":"3002402","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|L03386|1979-01-01|M02709|1979-01-01|126677"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06492","name":"Regional Gravel Products Inc"},"object":{"type":"mine","id":"3002402","name":"Macedon Plant"},"validFrom":"1983-01-19","validTo":"1986-11-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|L06492|1983-01-19|1986-11-02"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05164","name":"Palmer B J"},"object":{"type":"mine","id":"3002402","name":"Macedon Plant"},"validFrom":"1983-01-19","validTo":"1986-11-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|M05164|1983-01-19|1986-11-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05164","name":"Palmer B J"},"object":{"type":"operator","id":"L06492","name":"Regional Gravel Products Inc"},"validFrom":"1983-01-19","validTo":"1986-11-02","current":false,"derived":true,"evidenceMineId":"3002402","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|L06492|1983-01-19|M05164|1983-01-19|133855"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05657","name":"Regional Sand & Gravel Inc"},"object":{"type":"mine","id":"3002402","name":"Macedon Plant"},"validFrom":"1986-11-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|L05657|1986-11-03|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04569","name":"Joseph  Spezio"},"object":{"type":"mine","id":"3002402","name":"Macedon Plant"},"validFrom":"1986-11-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|M04569|1986-11-03|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04569","name":"Joseph  Spezio"},"object":{"type":"operator","id":"L05657","name":"Regional Sand & Gravel Inc"},"validFrom":"1986-11-03","validTo":null,"current":true,"derived":true,"evidenceMineId":"3002402","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3002402|L05657|1986-11-03|M04569|1986-11-03|132273"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3002402","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"}}