{"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":"2026-10-17T05:35:58.500035+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":"1510030","name":"No. 1 Tipple"},"operator":{"type":"operator","id":"P14493","name":"D F M Inc"},"controller":{"type":"controller","id":"C05250","name":"David F  May"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00414","name":"Western Coal Corp"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"1976-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|C00414|1976-06-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P05381","name":"Little Delta Mining Company Inc"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"1976-10-01","validTo":"1984-01-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P05381|1976-10-01|1984-01-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00414","name":"Western Coal Corp"},"object":{"type":"operator","id":"P05381","name":"Little Delta Mining Company Inc"},"validFrom":"1976-10-01","validTo":"1984-01-24","current":false,"derived":true,"evidenceMineId":"1510030","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P05381|1976-10-01|C00414|1976-06-01|47052"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05250","name":"David F  May"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"1983-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|C05250|1983-06-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P15166","name":"Katron Coal Corp"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"1984-01-25","validTo":"1987-05-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P15166|1984-01-25|1987-05-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10930","name":"Neal Pete"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"1984-01-25","validTo":"1987-05-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|C10930|1984-01-25|1987-05-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10930","name":"Neal Pete"},"object":{"type":"operator","id":"P15166","name":"Katron Coal Corp"},"validFrom":"1984-01-25","validTo":"1987-05-21","current":false,"derived":true,"evidenceMineId":"1510030","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P15166|1984-01-25|C10930|1984-01-25|83182"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18877","name":"Highlands Coal Sales Inc"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"1987-05-22","validTo":"2003-10-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P18877|1987-05-22|2003-10-07"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12030","name":"B W  McDonald"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"1987-05-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|C12030|1987-05-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12030","name":"B W  McDonald"},"object":{"type":"operator","id":"P18877","name":"Highlands Coal Sales Inc"},"validFrom":"1987-05-22","validTo":"2003-10-07","current":false,"derived":true,"evidenceMineId":"1510030","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P18877|1987-05-22|C12030|1987-05-22|85981"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P14493","name":"D F M Inc"},"object":{"type":"mine","id":"1510030","name":"No. 1 Tipple"},"validFrom":"2003-10-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P14493|2003-10-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05250","name":"David F  May"},"object":{"type":"operator","id":"P14493","name":"D F M Inc"},"validFrom":"2003-10-08","validTo":null,"current":true,"derived":true,"evidenceMineId":"1510030","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1510030|P14493|2003-10-08|C05250|1983-06-01|68003"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1510030","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}