{"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":"3401224","name":"Watts Pit"},"operator":{"type":"operator","id":"L12760","name":"T & M Sand & Gravel"},"controller":{"type":"controller","id":"0122923","name":"Mark D  Matthews"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12759","name":"Steel Ball Inc"},"object":{"type":"mine","id":"3401224","name":"Watts Pit"},"validFrom":"1979-08-01","validTo":"1992-08-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|L12759|1979-08-01|1992-08-24"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09781","name":"J B  Harriman"},"object":{"type":"mine","id":"3401224","name":"Watts Pit"},"validFrom":"1979-08-01","validTo":"1992-08-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|M09781|1979-08-01|1992-08-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09781","name":"J B  Harriman"},"object":{"type":"operator","id":"L12759","name":"Steel Ball Inc"},"validFrom":"1979-08-01","validTo":"1992-08-24","current":false,"derived":true,"evidenceMineId":"3401224","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|L12759|1979-08-01|M09781|1979-08-01|147513"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12760","name":"T & M Sand & Gravel"},"object":{"type":"mine","id":"3401224","name":"Watts Pit"},"validFrom":"1992-08-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|L12760|1992-08-25|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09782","name":"Mary E  Matthews"},"object":{"type":"mine","id":"3401224","name":"Watts Pit"},"validFrom":"1992-08-25","validTo":"2016-01-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|M09782|1992-08-25|2016-01-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09782","name":"Mary E  Matthews"},"object":{"type":"operator","id":"L12760","name":"T & M Sand & Gravel"},"validFrom":"1992-08-25","validTo":"2016-01-14","current":false,"derived":true,"evidenceMineId":"3401224","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|L12760|1992-08-25|M09782|1992-08-25|147514"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0122923","name":"Mark D  Matthews"},"object":{"type":"mine","id":"3401224","name":"Watts Pit"},"validFrom":"2016-01-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|0122923|2016-01-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0122923","name":"Mark D  Matthews"},"object":{"type":"operator","id":"L12760","name":"T & M Sand & Gravel"},"validFrom":"2016-01-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"3401224","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401224|L12760|1992-08-25|0122923|2016-01-15|23878"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3401224","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"}}