{"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":"3601889","name":"Buck Mountain Slope"},"operator":{"type":"operator","id":"P23528","name":"Jackstone Coal Company"},"controller":{"type":"controller","id":"C15463","name":"Gary  Lucas"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P05364","name":"Daubert & Knorr Coal Company"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1950-01-01","validTo":"1980-12-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P05364|1950-01-01|1980-12-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04444","name":"Knorr Leroy Et Al"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1950-01-01","validTo":"1980-12-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|C04444|1950-01-01|1980-12-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04444","name":"Knorr Leroy Et Al"},"object":{"type":"operator","id":"P05364","name":"Daubert & Knorr Coal Company"},"validFrom":"1950-01-01","validTo":"1980-12-11","current":false,"derived":true,"evidenceMineId":"3601889","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P05364|1950-01-01|C04444|1950-01-01|66020"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P11323","name":"Black Creek Coal Company Inc"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1980-12-12","validTo":"1984-06-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P11323|1980-12-12|1984-06-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08517","name":"Lesher Robert & John Johnson"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1980-12-12","validTo":"1984-06-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|C08517|1980-12-12|1984-06-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08517","name":"Lesher Robert & John Johnson"},"object":{"type":"operator","id":"P11323","name":"Black Creek Coal Company Inc"},"validFrom":"1980-12-12","validTo":"1984-06-11","current":false,"derived":true,"evidenceMineId":"3601889","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P11323|1980-12-12|C08517|1980-12-12|77538"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P16117","name":"R & K Coal Company"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1984-06-12","validTo":"1987-11-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P16117|1984-06-12|1987-11-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11482","name":"Robert E  Lesher"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1984-06-12","validTo":"1987-11-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|C11482|1984-06-12|1987-11-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11482","name":"Robert E  Lesher"},"object":{"type":"operator","id":"P16117","name":"R & K Coal Company"},"validFrom":"1984-06-12","validTo":"1987-11-17","current":false,"derived":true,"evidenceMineId":"3601889","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P16117|1984-06-12|C11482|1984-06-12|84703"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19188","name":"R & K Coal Company Inc"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1987-11-18","validTo":"1996-06-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P19188|1987-11-18|1996-06-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10411","name":"Jerry W  Lucas Jr"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1987-11-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|C10411|1987-11-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10411","name":"Jerry W  Lucas Jr"},"object":{"type":"operator","id":"P19188","name":"R & K Coal Company Inc"},"validFrom":"1987-11-18","validTo":"1996-06-08","current":false,"derived":true,"evidenceMineId":"3601889","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P19188|1987-11-18|C10411|1987-11-18|81924"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23528","name":"Jackstone Coal Company"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1996-06-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P23528|1996-06-09|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15463","name":"Gary  Lucas et al"},"object":{"type":"mine","id":"3601889","name":"Buck Mountain Slope"},"validFrom":"1996-06-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|C15463|1996-06-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15463","name":"Gary  Lucas et al"},"object":{"type":"operator","id":"P23528","name":"Jackstone Coal Company"},"validFrom":"1996-06-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"3601889","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3601889|P23528|1996-06-09|C15463|1996-06-09|95697"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3601889","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"}}