{"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":"1500600","name":"No 1 Mine"},"operator":{"type":"operator","id":"P10175","name":"Ky High Grade Coal Company Inc"},"controller":{"type":"controller","id":"C02890","name":"Jackson Roy Dan"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00586","name":"Dry Lake Coal Company Inc"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1950-01-01","validTo":"1976-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P00586|1950-01-01|1976-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02615","name":"Charles  Turner"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1950-01-01","validTo":"1976-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|C02615|1950-01-01|1976-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02615","name":"Charles  Turner"},"object":{"type":"operator","id":"P00586","name":"Dry Lake Coal Company Inc"},"validFrom":"1950-01-01","validTo":"1976-05-31","current":false,"derived":true,"evidenceMineId":"1500600","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P00586|1950-01-01|C02615|1950-01-01|60231"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02890","name":"Jackson Roy Dan"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|C02890|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03505","name":"Dry Lake Coal Company Inc"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1976-06-01","validTo":"1978-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P03505|1976-06-01|1978-03-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02890","name":"Jackson Roy Dan"},"object":{"type":"operator","id":"P03505","name":"Dry Lake Coal Company Inc"},"validFrom":"1976-06-01","validTo":"1978-03-31","current":false,"derived":true,"evidenceMineId":"1500600","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P03505|1976-06-01|C02890|1950-01-01|61118"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08105","name":"Dry Lake Coal Company Inc"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1978-04-01","validTo":"1979-04-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P08105|1978-04-01|1979-04-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03537","name":"Turner Charles & Bobby Joe Hensley"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1978-04-01","validTo":"1980-03-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|C03537|1978-04-01|1980-03-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03537","name":"Turner Charles & Bobby Joe Hensley"},"object":{"type":"operator","id":"P08105","name":"Dry Lake Coal Company Inc"},"validFrom":"1978-04-01","validTo":"1979-04-08","current":false,"derived":true,"evidenceMineId":"1500600","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P08105|1978-04-01|C03537|1978-04-01|63179"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06634","name":"Ky High Grade Coals Inc"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1979-04-09","validTo":"1980-03-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P06634|1979-04-09|1980-03-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07207","name":"Middleton Wendell L"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1979-04-09","validTo":"1980-03-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|C07207|1979-04-09|1980-03-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07207","name":"Middleton Wendell L"},"object":{"type":"operator","id":"P06634","name":"Ky High Grade Coals Inc"},"validFrom":"1979-04-09","validTo":"1980-03-05","current":false,"derived":true,"evidenceMineId":"1500600","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P06634|1979-04-09|C07207|1979-04-09|74119"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10175","name":"Ky High Grade Coal Company Inc"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1980-03-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P10175|1980-03-06|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02890","name":"Jackson Roy Dan"},"object":{"type":"mine","id":"1500600","name":"No 1 Mine"},"validFrom":"1980-03-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|C02890|1980-03-06|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02890","name":"Jackson Roy Dan"},"object":{"type":"operator","id":"P10175","name":"Ky High Grade Coal Company Inc"},"validFrom":"1980-03-06","validTo":null,"current":true,"derived":true,"evidenceMineId":"1500600","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1500600|P10175|1980-03-06|C02890|1980-03-06|61137"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1500600","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"}}