{"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":"4604975","name":"Delta Prep Plant No 1"},"operator":{"type":"operator","id":"P11691","name":"Delta Minerals Inc"},"controller":{"type":"controller","id":"C07141","name":"Billings J H"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04275","name":"A B Rose Inc"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1975-12-01","validTo":"1977-01-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P04275|1975-12-01|1977-01-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03510","name":"Rose A B"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1975-12-01","validTo":"1977-01-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|C03510|1975-12-01|1977-01-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03510","name":"Rose A B"},"object":{"type":"operator","id":"P04275","name":"A B Rose Inc"},"validFrom":"1975-12-01","validTo":"1977-01-26","current":false,"derived":true,"evidenceMineId":"4604975","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P04275|1975-12-01|C03510|1975-12-01|63102"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03876","name":"Grubb Ned"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1977-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|C03876|1977-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04697","name":"Warrior Mining Corp"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1977-01-27","validTo":"1980-06-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P04697|1977-01-27|1980-06-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03876","name":"Grubb Ned"},"object":{"type":"operator","id":"P04697","name":"Warrior Mining Corp"},"validFrom":"1977-01-27","validTo":"1980-06-18","current":false,"derived":true,"evidenceMineId":"4604975","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P04697|1977-01-27|C03876|1977-01-01|64113"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10769","name":"Pocahontas Coal & Coke Company Inc"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1980-06-19","validTo":"1980-11-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P10769|1980-06-19|1980-11-23"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08162","name":"Robert R  Bowling"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1980-06-19","validTo":"1980-11-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|C08162|1980-06-19|1980-11-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08162","name":"Robert R  Bowling"},"object":{"type":"operator","id":"P10769","name":"Pocahontas Coal & Coke Company Inc"},"validFrom":"1980-06-19","validTo":"1980-11-23","current":false,"derived":true,"evidenceMineId":"4604975","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P10769|1980-06-19|C08162|1980-06-19|76583"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P11691","name":"Delta Minerals Inc"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1980-11-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P11691|1980-11-24|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07141","name":"Billings J H"},"object":{"type":"mine","id":"4604975","name":"Delta Prep Plant No 1"},"validFrom":"1980-11-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|C07141|1980-11-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07141","name":"Billings J H"},"object":{"type":"operator","id":"P11691","name":"Delta Minerals Inc"},"validFrom":"1980-11-24","validTo":null,"current":true,"derived":true,"evidenceMineId":"4604975","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604975|P11691|1980-11-24|C07141|1980-11-24|73889"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4604975","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"}}