{"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":"4609518","name":"Pounding  Mill Surface Mine"},"operator":{"type":"operator","id":"0135215","name":"HAMPDEN COAL, LLC"},"controller":{"type":"controller","id":"0158381","name":"Sev.en Global Investments a.s."},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0109461","name":"Blackhawk Mining LLC"},"object":{"type":"mine","id":"4609518","name":"Pounding  Mill Surface Mine"},"validFrom":"2014-09-01","validTo":"2020-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609518|0109461|2014-09-01|2020-05-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0135215","name":"HAMPDEN COAL, LLC"},"object":{"type":"mine","id":"4609518","name":"Pounding  Mill Surface Mine"},"validFrom":"2016-10-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609518|0135215|2016-10-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0109461","name":"Blackhawk Mining LLC"},"object":{"type":"operator","id":"0135215","name":"HAMPDEN COAL, LLC"},"validFrom":"2016-10-19","validTo":"2020-05-31","current":false,"derived":true,"evidenceMineId":"4609518","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609518|0135215|2016-10-19|0109461|2014-09-01|19872"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0158381","name":"Sev.en Global Investments a.s."},"object":{"type":"mine","id":"4609518","name":"Pounding  Mill Surface Mine"},"validFrom":"2020-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609518|0158381|2020-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0158381","name":"Sev.en Global Investments a.s."},"object":{"type":"operator","id":"0135215","name":"HAMPDEN COAL, LLC"},"validFrom":"2020-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4609518","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609518|0135215|2016-10-19|0158381|2020-06-01|32887"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4609518","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"}}