{"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":"4001574","name":"Chesney Surface"},"operator":{"type":"operator","id":"L16759","name":"Carmeuse Lime & Stone"},"controller":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00694","name":"Luttrell Mining Company Inc"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1950-01-01","validTo":"1983-06-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L00694|1950-01-01|1983-06-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00572","name":"Preston Carroll Enterprises Inc"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1950-01-01","validTo":"1984-09-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|M00572|1950-01-01|1984-09-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00572","name":"Preston Carroll Enterprises Inc"},"object":{"type":"operator","id":"L00694","name":"Luttrell Mining Company Inc"},"validFrom":"1950-01-01","validTo":"1983-06-21","current":false,"derived":true,"evidenceMineId":"4001574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L00694|1950-01-01|M00572|1950-01-01|113155"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06677","name":"Blue Ridge Mining Company Inc"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1983-06-22","validTo":"1991-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L06677|1983-06-22|1991-02-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00241","name":"Morrison Knudsen Corp (Old)"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1983-06-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|M00241|1983-06-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00241","name":"Morrison Knudsen Corp (Old)"},"object":{"type":"operator","id":"L06677","name":"Blue Ridge Mining Company Inc"},"validFrom":"1983-06-22","validTo":"1991-02-28","current":false,"derived":true,"evidenceMineId":"4001574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L06677|1983-06-22|M00241|1983-06-22|108053"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02220","name":"Penn Virginia Corp"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1988-09-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|M02220|1988-09-15|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10515","name":"Tenn Luttrell Company"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1991-03-01","validTo":"1993-10-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L10515|1991-03-01|1993-10-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02220","name":"Penn Virginia Corp"},"object":{"type":"operator","id":"L10515","name":"Tenn Luttrell Company"},"validFrom":"1991-03-01","validTo":"1993-10-20","current":false,"derived":true,"evidenceMineId":"4001574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L10515|1991-03-01|M02220|1988-09-15|124351"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14869","name":"Global Stone Tenn Luttrell Company"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1993-10-21","validTo":"1998-06-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L14869|1993-10-21|1998-06-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10157","name":"Global Stone Corp"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1993-10-21","validTo":"1998-06-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|M10157|1993-10-21|1998-06-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10157","name":"Global Stone Corp"},"object":{"type":"operator","id":"L14869","name":"Global Stone Tenn Luttrell Company"},"validFrom":"1993-10-21","validTo":"1998-06-21","current":false,"derived":true,"evidenceMineId":"4001574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L14869|1993-10-21|M10157|1993-10-21|148529"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16759","name":"Carmeuse Lime & Stone"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1998-06-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L16759|1998-06-22|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00581","name":"Oglebay Norton Company"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"1998-06-22","validTo":"2008-02-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|M00581|1998-06-22|2008-02-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00581","name":"Oglebay Norton Company"},"object":{"type":"operator","id":"L16759","name":"Carmeuse Lime & Stone"},"validFrom":"1998-06-22","validTo":"2008-02-12","current":false,"derived":true,"evidenceMineId":"4001574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L16759|1998-06-22|M00581|1998-06-22|113243"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"mine","id":"4001574","name":"Chesney Surface"},"validFrom":"2008-02-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|M10266|2008-02-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"operator","id":"L16759","name":"Carmeuse Lime & Stone"},"validFrom":"2008-02-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"4001574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001574|L16759|1998-06-22|M10266|2008-02-13|148798"}}],"coverage":{"historyRecords":6,"edgeCount":17,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4001574","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"}}