{"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":"3606478","name":"Pitt Gas Mine"},"operator":{"type":"operator","id":"P22733","name":"D & L Mining Inc"},"controller":{"type":"controller","id":"C15039","name":"Nakutis Dennis Sr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06737","name":"Canon Coal Company"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1977-08-01","validTo":"1986-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P06737|1977-08-01|1986-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05585","name":"Canon Coal Corp & Crescent Hills Coal Co Inc"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1977-08-01","validTo":"1986-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|C05585|1977-08-01|1986-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05585","name":"Canon Coal Corp & Crescent Hills Coal Co Inc"},"object":{"type":"operator","id":"P06737","name":"Canon Coal Company"},"validFrom":"1977-08-01","validTo":"1986-12-31","current":false,"derived":true,"evidenceMineId":"3606478","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P06737|1977-08-01|C05585|1977-08-01|69286"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18427","name":"Canon Coal Company Inc"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1987-01-01","validTo":"1987-08-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P18427|1987-01-01|1987-08-04"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12840","name":"Atlas Alloys Company Inc"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1987-01-01","validTo":"1987-08-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|C12840|1987-01-01|1987-08-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12840","name":"Atlas Alloys Company Inc"},"object":{"type":"operator","id":"P18427","name":"Canon Coal Company Inc"},"validFrom":"1987-01-01","validTo":"1987-08-04","current":false,"derived":true,"evidenceMineId":"3606478","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P18427|1987-01-01|C12840|1987-01-01|88057"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19219","name":"Dynamic Recovery Inc"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1987-08-05","validTo":"1994-03-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P19219|1987-08-05|1994-03-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08980","name":"Hayhurst James W Ii"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1987-08-05","validTo":"1995-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|C08980|1987-08-05|1995-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08980","name":"Hayhurst James W Ii"},"object":{"type":"operator","id":"P19219","name":"Dynamic Recovery Inc"},"validFrom":"1987-08-05","validTo":"1994-03-27","current":false,"derived":true,"evidenceMineId":"3606478","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P19219|1987-08-05|C08980|1987-08-05|78620"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22733","name":"D & L Mining Inc"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1994-03-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P22733|1994-03-28|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15039","name":"Nakutis Dennis Sr"},"object":{"type":"mine","id":"3606478","name":"Pitt Gas Mine"},"validFrom":"1994-03-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|C15039|1994-03-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15039","name":"Nakutis Dennis Sr"},"object":{"type":"operator","id":"P22733","name":"D & L Mining Inc"},"validFrom":"1994-03-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"3606478","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3606478|P22733|1994-03-28|C15039|1994-03-28|94648"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3606478","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"}}