{"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":"2026-10-18T09:31:49.615908+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":"0405432","name":"Grimes Rock a CalPortland Company"},"operator":{"type":"operator","id":"L11900","name":"CalPortland"},"controller":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"object":{"type":"mine","id":"0405432","name":"Grimes Rock a CalPortland Company"},"validFrom":"1990-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0405432|M07897|1990-10-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17323","name":"Grimes Rock Inc"},"object":{"type":"mine","id":"0405432","name":"Grimes Rock a CalPortland Company"},"validFrom":"2000-04-01","validTo":"2024-12-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0405432|L17323|2000-04-01|2024-12-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13211","name":"Russell  Cochran"},"object":{"type":"mine","id":"0405432","name":"Grimes Rock a CalPortland Company"},"validFrom":"2000-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0405432|M13211|2000-04-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13211","name":"Russell  Cochran"},"object":{"type":"operator","id":"L17323","name":"Grimes Rock Inc"},"validFrom":"2000-04-01","validTo":"2024-12-27","current":false,"derived":true,"evidenceMineId":"0405432","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0405432|L17323|2000-04-01|M13211|2000-04-01|155784"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11900","name":"CalPortland"},"object":{"type":"mine","id":"0405432","name":"Grimes Rock a CalPortland Company"},"validFrom":"2024-12-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0405432|L11900|2024-12-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"object":{"type":"operator","id":"L11900","name":"CalPortland"},"validFrom":"2024-12-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"0405432","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0405432|L11900|2024-12-28|M07897|1990-10-01|142278"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0405432","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}