{"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":"2901955","name":"Portable Crusher & Screen"},"operator":{"type":"operator","id":"L31686","name":"CSC, Inc."},"controller":{"type":"controller","id":"M13375","name":"Dennis  Muncrief"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13375","name":"Dennis  Muncrief"},"object":{"type":"mine","id":"2901955","name":"Portable Crusher & Screen"},"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":"2901955|M13375|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08581","name":"Verdugo Contract Hauling & Backhoe Service"},"object":{"type":"mine","id":"2901955","name":"Portable Crusher & Screen"},"validFrom":"1984-04-01","validTo":"1986-05-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901955|L08581|1984-04-01|1986-05-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06803","name":"Lorenzo  Verdugo"},"object":{"type":"mine","id":"2901955","name":"Portable Crusher & Screen"},"validFrom":"1984-04-01","validTo":"1986-05-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901955|M06803|1984-04-01|1986-05-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06803","name":"Lorenzo  Verdugo"},"object":{"type":"operator","id":"L08581","name":"Verdugo Contract Hauling & Backhoe Service"},"validFrom":"1984-04-01","validTo":"1986-05-18","current":false,"derived":true,"evidenceMineId":"2901955","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901955|L08581|1984-04-01|M06803|1984-04-01|139375"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L31686","name":"CSC, Inc."},"object":{"type":"mine","id":"2901955","name":"Portable Crusher & Screen"},"validFrom":"1986-05-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901955|L31686|1986-05-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13375","name":"Dennis  Muncrief"},"object":{"type":"operator","id":"L31686","name":"CSC, Inc."},"validFrom":"1986-05-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"2901955","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901955|L31686|1986-05-19|M13375|1950-01-01|156123"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2901955","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"}}