{"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":"0103526","name":"Mitchell Mtn Quarry Hwy 144"},"operator":{"type":"operator","id":"0176393","name":"Seawright & Robison Construction, Inc."},"controller":{"type":"controller","id":"0161883","name":"Joshua  Seawright; Kendall W Robison Sr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0165678","name":"Scott Johnson Construction"},"object":{"type":"mine","id":"0103526","name":"Mitchell Mtn Quarry Hwy 144"},"validFrom":"2019-01-02","validTo":"2023-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0103526|0165678|2019-01-02|2023-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0150021","name":"Scott A Johnson"},"object":{"type":"mine","id":"0103526","name":"Mitchell Mtn Quarry Hwy 144"},"validFrom":"2019-01-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0103526|0150021|2019-01-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0150021","name":"Scott A Johnson"},"object":{"type":"operator","id":"0165678","name":"Scott Johnson Construction"},"validFrom":"2019-01-02","validTo":"2023-12-31","current":false,"derived":true,"evidenceMineId":"0103526","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0103526|0165678|2019-01-02|0150021|2019-01-02|30922"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0161883","name":"Kendall W Robison Sr et al"},"object":{"type":"mine","id":"0103526","name":"Mitchell Mtn Quarry Hwy 144"},"validFrom":"2021-05-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0103526|0161883|2021-05-07|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0176393","name":"Seawright & Robison Construction, Inc."},"object":{"type":"mine","id":"0103526","name":"Mitchell Mtn Quarry Hwy 144"},"validFrom":"2024-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0103526|0176393|2024-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0161883","name":"Kendall W Robison Sr et al"},"object":{"type":"operator","id":"0176393","name":"Seawright & Robison Construction, Inc."},"validFrom":"2024-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0103526","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0103526|0176393|2024-01-01|0161883|2021-05-07|33889"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0161883","name":"Joshua  Seawright et al"},"object":{"type":"operator","id":"0176393","name":"Seawright & Robison Construction, Inc."},"validFrom":"2024-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0103526","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0103526|0176393|2024-01-01|0161883|2021-05-07|33890"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0103526","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"}}