{"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":"0901220","name":"Savannah Gray Quarry"},"operator":{"type":"operator","id":"0172133","name":"Savannah Gray Quarry, LLC"},"controller":{"type":"controller","id":"0157041","name":"Michael  Baston; William L Hood IV; Bradley C Ruff"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09280","name":"Dale T  Willis"},"object":{"type":"mine","id":"0901220","name":"Savannah Gray Quarry"},"validFrom":"1991-01-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|M09280|1991-01-29|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12031","name":"Willis Dimension Stone, Inc."},"object":{"type":"mine","id":"0901220","name":"Savannah Gray Quarry"},"validFrom":"2012-05-17","validTo":"2020-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|L12031|2012-05-17|2020-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09280","name":"Dale T  Willis"},"object":{"type":"operator","id":"L12031","name":"Willis Dimension Stone, Inc."},"validFrom":"2012-05-17","validTo":"2020-06-30","current":false,"derived":true,"evidenceMineId":"0901220","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|L12031|2012-05-17|M09280|1991-01-29|146019"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0172133","name":"Savannah Gray Quarry, LLC"},"object":{"type":"mine","id":"0901220","name":"Savannah Gray Quarry"},"validFrom":"2020-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|0172133|2020-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0157041","name":"Bradley C Ruff et al"},"object":{"type":"mine","id":"0901220","name":"Savannah Gray Quarry"},"validFrom":"2020-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|0157041|2020-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0157041","name":"Bradley C Ruff et al"},"object":{"type":"operator","id":"0172133","name":"Savannah Gray Quarry, LLC"},"validFrom":"2020-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0901220","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|0172133|2020-07-01|0157041|2020-07-01|32514"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0157041","name":"William L Hood IV et al"},"object":{"type":"operator","id":"0172133","name":"Savannah Gray Quarry, LLC"},"validFrom":"2020-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0901220","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|0172133|2020-07-01|0157041|2020-07-01|32515"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0157041","name":"Michael  Baston et al"},"object":{"type":"operator","id":"0172133","name":"Savannah Gray Quarry, LLC"},"validFrom":"2020-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0901220","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901220|0172133|2020-07-01|0157041|2020-07-01|32516"}}],"coverage":{"historyRecords":4,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0901220","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"}}