{"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":"1501161","name":"No 8 Mine"},"operator":{"type":"operator","id":"P02216","name":"Earnest Cook Coal Company Inc"},"controller":{"type":"controller","id":"C04802","name":"Michael K  Cook; Randy A  Cook"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02927","name":"Ricky Coal Company"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1950-01-01","validTo":"1973-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P02927|1950-01-01|1973-11-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02507","name":"Ricky Coal Company"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1950-01-01","validTo":"1974-08-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|C02507|1950-01-01|1974-08-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02507","name":"Ricky Coal Company"},"object":{"type":"operator","id":"P02927","name":"Ricky Coal Company"},"validFrom":"1950-01-01","validTo":"1973-11-30","current":false,"derived":true,"evidenceMineId":"1501161","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P02927|1950-01-01|C02507|1950-01-01|58795"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03044","name":"Couch Coal Company"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1973-12-01","validTo":"1974-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P03044|1973-12-01|1974-04-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01930","name":"Couch George"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1973-12-01","validTo":"1974-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|C01930|1973-12-01|1974-04-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01930","name":"Couch George"},"object":{"type":"operator","id":"P03044","name":"Couch Coal Company"},"validFrom":"1973-12-01","validTo":"1974-04-30","current":false,"derived":true,"evidenceMineId":"1501161","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P03044|1973-12-01|C01930|1973-12-01|56867"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02217","name":"Jethro Cook Coal Company"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1974-05-01","validTo":"1974-09-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P02217|1974-05-01|1974-09-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01891","name":"Cook Jethro"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1974-05-01","validTo":"1974-09-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|C01891|1974-05-01|1974-09-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01891","name":"Cook Jethro"},"object":{"type":"operator","id":"P02217","name":"Jethro Cook Coal Company"},"validFrom":"1974-05-01","validTo":"1974-09-16","current":false,"derived":true,"evidenceMineId":"1501161","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P02217|1974-05-01|C01891|1974-05-01|56720"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02216","name":"Earnest Cook Coal Company Inc"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1974-09-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P02216|1974-09-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04802","name":"Michael K  Cook et al"},"object":{"type":"mine","id":"1501161","name":"No 8 Mine"},"validFrom":"1974-09-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|C04802|1974-09-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04802","name":"Michael K  Cook et al"},"object":{"type":"operator","id":"P02216","name":"Earnest Cook Coal Company Inc"},"validFrom":"1974-09-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"1501161","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P02216|1974-09-17|C04802|1974-09-17|66761"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04802","name":"Randy A  Cook et al"},"object":{"type":"operator","id":"P02216","name":"Earnest Cook Coal Company Inc"},"validFrom":"1974-09-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"1501161","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1501161|P02216|1974-09-17|C04802|1974-09-17|66762"}}],"coverage":{"historyRecords":5,"edgeCount":13,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1501161","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"}}