{"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":"1508240","name":"No 1 Mine"},"operator":{"type":"operator","id":"P08162","name":"Redwood Coal Company"},"controller":{"type":"controller","id":"C06573","name":"Short Bobby & Steve Hall"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03432","name":"H & H Coal Company"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1975-05-24","validTo":"1975-10-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P03432|1975-05-24|1975-10-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02841","name":"Thornsberry Gerald & J B Collins"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1975-05-24","validTo":"1975-10-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|C02841|1975-05-24|1975-10-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02841","name":"Thornsberry Gerald & J B Collins"},"object":{"type":"operator","id":"P03432","name":"H & H Coal Company"},"validFrom":"1975-05-24","validTo":"1975-10-28","current":false,"derived":true,"evidenceMineId":"1508240","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P03432|1975-05-24|C02841|1975-05-24|61006"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03434","name":"H & H Coal Company"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1975-10-29","validTo":"1976-09-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P03434|1975-10-29|1976-09-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02843","name":"Rush Bill & Lynn M Vierling"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1975-10-29","validTo":"1976-09-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|C02843|1975-10-29|1976-09-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02843","name":"Rush Bill & Lynn M Vierling"},"object":{"type":"operator","id":"P03434","name":"H & H Coal Company"},"validFrom":"1975-10-29","validTo":"1976-09-19","current":false,"derived":true,"evidenceMineId":"1508240","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P03434|1975-10-29|C02843|1975-10-29|61009"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03418","name":"Parsons Brothers Coal Company"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1976-09-20","validTo":"1978-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P03418|1976-09-20|1978-04-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02828","name":"Parsons Thomas J Et Al"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1976-09-20","validTo":"1978-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|C02828|1976-09-20|1978-04-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02828","name":"Parsons Thomas J Et Al"},"object":{"type":"operator","id":"P03418","name":"Parsons Brothers Coal Company"},"validFrom":"1976-09-20","validTo":"1978-04-30","current":false,"derived":true,"evidenceMineId":"1508240","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P03418|1976-09-20|C02828|1976-09-20|60929"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P11694","name":"Redwood Coal Company"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1978-05-01","validTo":"1978-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P11694|1978-05-01|1978-08-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08726","name":"Banks Raymond"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1978-05-01","validTo":"1978-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|C08726|1978-05-01|1978-08-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08726","name":"Banks Raymond"},"object":{"type":"operator","id":"P11694","name":"Redwood Coal Company"},"validFrom":"1978-05-01","validTo":"1978-08-31","current":false,"derived":true,"evidenceMineId":"1508240","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P11694|1978-05-01|C08726|1978-05-01|78036"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08162","name":"Redwood Coal Company"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1978-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P08162|1978-09-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06573","name":"Short Bobby & Steve Hall"},"object":{"type":"mine","id":"1508240","name":"No 1 Mine"},"validFrom":"1978-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|C06573|1978-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06573","name":"Short Bobby & Steve Hall"},"object":{"type":"operator","id":"P08162","name":"Redwood Coal Company"},"validFrom":"1978-09-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1508240","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1508240|P08162|1978-09-01|C06573|1978-09-01|72171"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1508240","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"}}