{"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":"1504391","name":"Lawrence No 17 Mine"},"operator":{"type":"operator","id":"P03408","name":"L T Ruth Coal Company Inc"},"controller":{"type":"controller","id":"C02820","name":"Central Kentucky Landscaping Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01642","name":"Ridgeway Fuel Corp"},"object":{"type":"mine","id":"1504391","name":"Lawrence No 17 Mine"},"validFrom":"1950-01-01","validTo":"1977-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|P01642|1950-01-01|1977-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01270","name":"Ranier Harry Hale"},"object":{"type":"mine","id":"1504391","name":"Lawrence No 17 Mine"},"validFrom":"1950-01-01","validTo":"1977-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|C01270|1950-01-01|1977-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01270","name":"Ranier Harry Hale"},"object":{"type":"operator","id":"P01642","name":"Ridgeway Fuel Corp"},"validFrom":"1950-01-01","validTo":"1977-09-30","current":false,"derived":true,"evidenceMineId":"1504391","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|P01642|1950-01-01|C01270|1950-01-01|53207"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02820","name":"Central Kentucky Landscaping Company"},"object":{"type":"mine","id":"1504391","name":"Lawrence No 17 Mine"},"validFrom":"1976-04-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|C02820|1976-04-27|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08844","name":"Ridgeway Fuel Corp"},"object":{"type":"mine","id":"1504391","name":"Lawrence No 17 Mine"},"validFrom":"1977-10-01","validTo":"1981-09-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|P08844|1977-10-01|1981-09-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01255","name":"Zapata Corp"},"object":{"type":"mine","id":"1504391","name":"Lawrence No 17 Mine"},"validFrom":"1977-10-01","validTo":"1983-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|C01255|1977-10-01|1983-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01255","name":"Zapata Corp"},"object":{"type":"operator","id":"P08844","name":"Ridgeway Fuel Corp"},"validFrom":"1977-10-01","validTo":"1981-09-14","current":false,"derived":true,"evidenceMineId":"1504391","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|P08844|1977-10-01|C01255|1977-10-01|53126"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03408","name":"L T Ruth Coal Company Inc"},"object":{"type":"mine","id":"1504391","name":"Lawrence No 17 Mine"},"validFrom":"1981-09-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|P03408|1981-09-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02820","name":"Central Kentucky Landscaping Company"},"object":{"type":"operator","id":"P03408","name":"L T Ruth Coal Company Inc"},"validFrom":"1981-09-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"1504391","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1504391|P03408|1981-09-15|C02820|1976-04-27|60878"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1504391","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"}}