{"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":"1513289","name":"Loggy Hollow No 6 Mine"},"operator":{"type":"operator","id":"P06413","name":"Lake Coal Company Inc"},"controller":{"type":"controller","id":"C03873","name":"Howell Corporation"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03873","name":"Howell Corporation"},"object":{"type":"mine","id":"1513289","name":"Loggy Hollow No 6 Mine"},"validFrom":"1977-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|C03873|1977-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P13025","name":"Narce Caudill Quality Coal Company Inc"},"object":{"type":"mine","id":"1513289","name":"Loggy Hollow No 6 Mine"},"validFrom":"1982-02-01","validTo":"1983-05-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P13025|1982-02-01|1983-05-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04001","name":"Caudill Forrester & Narce Et Al"},"object":{"type":"mine","id":"1513289","name":"Loggy Hollow No 6 Mine"},"validFrom":"1982-02-01","validTo":"1983-05-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|C04001|1982-02-01|1983-05-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04001","name":"Caudill Forrester & Narce Et Al"},"object":{"type":"operator","id":"P13025","name":"Narce Caudill Quality Coal Company Inc"},"validFrom":"1982-02-01","validTo":"1983-05-08","current":false,"derived":true,"evidenceMineId":"1513289","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P13025|1982-02-01|C04001|1982-02-01|64559"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06413","name":"Lake Coal Company Inc"},"object":{"type":"mine","id":"1513289","name":"Loggy Hollow No 6 Mine"},"validFrom":"1983-05-09","validTo":"1984-07-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P06413|1983-05-09|1984-07-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03873","name":"Howell Corporation"},"object":{"type":"operator","id":"P06413","name":"Lake Coal Company Inc"},"validFrom":"1983-05-09","validTo":"1984-07-09","current":false,"derived":true,"evidenceMineId":"1513289","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P06413|1983-05-09|C03873|1977-01-01|64119"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P15856","name":"Katco Mining Company Inc"},"object":{"type":"mine","id":"1513289","name":"Loggy Hollow No 6 Mine"},"validFrom":"1984-07-10","validTo":"1987-05-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P15856|1984-07-10|1987-05-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10890","name":"David  Hogg et al"},"object":{"type":"mine","id":"1513289","name":"Loggy Hollow No 6 Mine"},"validFrom":"1984-07-10","validTo":"1987-05-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|C10890|1984-07-10|1987-05-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10890","name":"David  Hogg et al"},"object":{"type":"operator","id":"P15856","name":"Katco Mining Company Inc"},"validFrom":"1984-07-10","validTo":"1987-05-25","current":false,"derived":true,"evidenceMineId":"1513289","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P15856|1984-07-10|C10890|1984-07-10|83055"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06413","name":"Lake Coal Company Inc"},"object":{"type":"mine","id":"1513289","name":"Loggy Hollow No 6 Mine"},"validFrom":"1987-05-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P06413|1987-05-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03873","name":"Howell Corporation"},"object":{"type":"operator","id":"P06413","name":"Lake Coal Company Inc"},"validFrom":"1987-05-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"1513289","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1513289|P06413|1987-05-26|C03873|1977-01-01|64120"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1513289","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"}}