{"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":"0102669","name":"Howton"},"operator":{"type":"operator","id":"L13495","name":"Brookwood Sand & Gravel Inc"},"controller":{"type":"controller","id":"M10293","name":"Shubert James"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04814","name":"John R (Reed)  Marine Jr"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1982-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|M04814|1982-05-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04797","name":"Jaime S M  French"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1982-11-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|M04797|1982-11-23|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06017","name":"Al-Tenn Coal Company Inc"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1986-03-01","validTo":"1987-08-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L06017|1986-03-01|1987-08-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04814","name":"John R (Reed)  Marine Jr"},"object":{"type":"operator","id":"L06017","name":"Al-Tenn Coal Company Inc"},"validFrom":"1986-03-01","validTo":"1987-08-12","current":false,"derived":true,"evidenceMineId":"0102669","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L06017|1986-03-01|M04814|1982-05-01|132882"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05972","name":"Dunn Construction Company Inc"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1987-08-13","validTo":"1992-06-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L05972|1987-08-13|1992-06-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04797","name":"Jaime S M  French"},"object":{"type":"operator","id":"L05972","name":"Dunn Construction Company Inc"},"validFrom":"1987-08-13","validTo":"1992-06-15","current":false,"derived":true,"evidenceMineId":"0102669","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L05972|1987-08-13|M04797|1982-11-23|132834"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12678","name":"Brookwood Sand & Gravel Inc"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1992-06-16","validTo":"1994-06-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L12678|1992-06-16|1994-06-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09714","name":"Mills Charles E"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1992-06-16","validTo":"1994-06-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|M09714|1992-06-16|1994-06-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09714","name":"Mills Charles E"},"object":{"type":"operator","id":"L12678","name":"Brookwood Sand & Gravel Inc"},"validFrom":"1992-06-16","validTo":"1994-06-01","current":false,"derived":true,"evidenceMineId":"0102669","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L12678|1992-06-16|M09714|1992-06-16|147008"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13495","name":"Brookwood Sand & Gravel Inc"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1994-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L13495|1994-06-02|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10293","name":"Shubert James"},"object":{"type":"mine","id":"0102669","name":"Howton"},"validFrom":"1994-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|M10293|1994-06-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10293","name":"Shubert James"},"object":{"type":"operator","id":"L13495","name":"Brookwood Sand & Gravel Inc"},"validFrom":"1994-06-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"0102669","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102669|L13495|1994-06-02|M10293|1994-06-02|148935"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0102669","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"}}