{"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":"4300307","name":"EAGLE QUARRY"},"operator":{"type":"operator","id":"L12332","name":"Western Slate, Inc."},"controller":{"type":"controller","id":"M09469","name":"Jeffrey N  Harrison"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01424","name":"William J  Billow"},"object":{"type":"mine","id":"4300307","name":"EAGLE QUARRY"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300307|M01424|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01592","name":"Green Mountain Slate Inc"},"object":{"type":"mine","id":"4300307","name":"EAGLE QUARRY"},"validFrom":"1979-01-01","validTo":"2019-03-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300307|L01592|1979-01-01|2019-03-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01424","name":"William J  Billow"},"object":{"type":"operator","id":"L01592","name":"Green Mountain Slate Inc"},"validFrom":"1979-01-01","validTo":"2019-03-27","current":false,"derived":true,"evidenceMineId":"4300307","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300307|L01592|1979-01-01|M01424|1950-01-01|118554"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09469","name":"Jeffrey N  Harrison"},"object":{"type":"mine","id":"4300307","name":"EAGLE QUARRY"},"validFrom":"1991-05-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300307|M09469|1991-05-25|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12332","name":"Western Slate, Inc."},"object":{"type":"mine","id":"4300307","name":"EAGLE QUARRY"},"validFrom":"2019-03-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300307|L12332|2019-03-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09469","name":"Jeffrey N  Harrison"},"object":{"type":"operator","id":"L12332","name":"Western Slate, Inc."},"validFrom":"2019-03-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"4300307","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300307|L12332|2019-03-28|M09469|1991-05-25|146444"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4300307","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"}}