{"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":"2100186","name":"Echo Quarry"},"operator":{"type":"operator","id":"L09157","name":"Field Granite International Ltd"},"controller":{"type":"controller","id":"M07215","name":"Field Financial Corp"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00573","name":"Delano Granite Inc"},"object":{"type":"mine","id":"2100186","name":"Echo Quarry"},"validFrom":"1950-01-01","validTo":"1985-08-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|L00573|1950-01-01|1985-08-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00485","name":"Cy  Zierden"},"object":{"type":"mine","id":"2100186","name":"Echo Quarry"},"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":"2100186|M00485|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00485","name":"Cy  Zierden"},"object":{"type":"operator","id":"L00573","name":"Delano Granite Inc"},"validFrom":"1950-01-01","validTo":"1985-08-18","current":false,"derived":true,"evidenceMineId":"2100186","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|L00573|1950-01-01|M00485|1950-01-01|111759"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06170","name":"Tony J  Morris  et al"},"object":{"type":"mine","id":"2100186","name":"Echo Quarry"},"validFrom":"1985-03-18","validTo":"1986-10-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|M06170|1985-03-18|1986-10-14"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07762","name":"Georgia-Field Inc"},"object":{"type":"mine","id":"2100186","name":"Echo Quarry"},"validFrom":"1985-08-19","validTo":"1986-10-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|L07762|1985-08-19|1986-10-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06170","name":"Tony J  Morris  et al"},"object":{"type":"operator","id":"L07762","name":"Georgia-Field Inc"},"validFrom":"1985-08-19","validTo":"1986-10-14","current":false,"derived":true,"evidenceMineId":"2100186","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|L07762|1985-08-19|M06170|1985-03-18|136375"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09157","name":"Field Granite International Ltd"},"object":{"type":"mine","id":"2100186","name":"Echo Quarry"},"validFrom":"1986-10-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|L09157|1986-10-15|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07215","name":"Field Financial Corp"},"object":{"type":"mine","id":"2100186","name":"Echo Quarry"},"validFrom":"1986-10-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|M07215|1986-10-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07215","name":"Field Financial Corp"},"object":{"type":"operator","id":"L09157","name":"Field Granite International Ltd"},"validFrom":"1986-10-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"2100186","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100186|L09157|1986-10-15|M07215|1986-10-15|140356"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2100186","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"}}