{"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":"4502450","name":"BAYVIEW PIT AND PLANT"},"operator":{"type":"operator","id":"L10484","name":"Bayview Redi-Mix Inc"},"controller":{"type":"controller","id":"0148901","name":"Marvin  Prince"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10483","name":"Bayview Redi Mix"},"object":{"type":"mine","id":"4502450","name":"BAYVIEW PIT AND PLANT"},"validFrom":"1950-01-01","validTo":"1988-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|L10483|1950-01-01|1988-07-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08167","name":"Bush Robert E"},"object":{"type":"mine","id":"4502450","name":"BAYVIEW PIT AND PLANT"},"validFrom":"1950-01-01","validTo":"1988-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|M08167|1950-01-01|1988-07-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08167","name":"Bush Robert E"},"object":{"type":"operator","id":"L10483","name":"Bayview Redi Mix"},"validFrom":"1950-01-01","validTo":"1988-07-31","current":false,"derived":true,"evidenceMineId":"4502450","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|L10483|1950-01-01|M08167|1950-01-01|142828"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10484","name":"Bayview Redi-Mix Inc"},"object":{"type":"mine","id":"4502450","name":"BAYVIEW PIT AND PLANT"},"validFrom":"1988-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|L10484|1988-08-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08168","name":"Jack L  Prince"},"object":{"type":"mine","id":"4502450","name":"BAYVIEW PIT AND PLANT"},"validFrom":"1988-08-01","validTo":"2019-06-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|M08168|1988-08-01|2019-06-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08168","name":"Jack L  Prince"},"object":{"type":"operator","id":"L10484","name":"Bayview Redi-Mix Inc"},"validFrom":"1988-08-01","validTo":"2019-06-18","current":false,"derived":true,"evidenceMineId":"4502450","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|L10484|1988-08-01|M08168|1988-08-01|142829"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0148901","name":"Marvin  Prince"},"object":{"type":"mine","id":"4502450","name":"BAYVIEW PIT AND PLANT"},"validFrom":"2019-06-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|0148901|2019-06-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0148901","name":"Marvin  Prince"},"object":{"type":"operator","id":"L10484","name":"Bayview Redi-Mix Inc"},"validFrom":"2019-06-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"4502450","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4502450|L10484|1988-08-01|0148901|2019-06-19|30455"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4502450","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"}}