{"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":"4202223","name":"PORTABLE SCREEN PLANT #1009"},"operator":{"type":"operator","id":"L06525","name":"Frehner Construction Company Inc"},"controller":{"type":"controller","id":"0193740","name":"Amrize Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05190","name":"Garth  Frehner"},"object":{"type":"mine","id":"4202223","name":"PORTABLE SCREEN PLANT #1009"},"validFrom":"1983-08-01","validTo":"2004-05-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|M05190|1983-08-01|2004-05-09"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06525","name":"Frehner Construction Company Inc"},"object":{"type":"mine","id":"4202223","name":"PORTABLE SCREEN PLANT #1009"},"validFrom":"1998-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|L06525|1998-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05190","name":"Garth  Frehner"},"object":{"type":"operator","id":"L06525","name":"Frehner Construction Company Inc"},"validFrom":"1998-09-01","validTo":"2004-05-09","current":false,"derived":true,"evidenceMineId":"4202223","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|L06525|1998-09-01|M05190|1983-08-01|133912"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"mine","id":"4202223","name":"PORTABLE SCREEN PLANT #1009"},"validFrom":"2004-05-10","validTo":"2009-04-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|M07336|2004-05-10|2009-04-29"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"operator","id":"L06525","name":"Frehner Construction Company Inc"},"validFrom":"2004-05-10","validTo":"2009-04-29","current":false,"derived":true,"evidenceMineId":"4202223","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|L06525|1998-09-01|M07336|2004-05-10|141033"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01644","name":"Holcim Ltd"},"object":{"type":"mine","id":"4202223","name":"PORTABLE SCREEN PLANT #1009"},"validFrom":"2009-04-30","validTo":"2015-07-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|M01644|2009-04-30|2015-07-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01644","name":"Holcim Ltd"},"object":{"type":"operator","id":"L06525","name":"Frehner Construction Company Inc"},"validFrom":"2009-04-30","validTo":"2015-07-09","current":false,"derived":true,"evidenceMineId":"4202223","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|L06525|1998-09-01|M01644|2009-04-30|119941"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"mine","id":"4202223","name":"PORTABLE SCREEN PLANT #1009"},"validFrom":"2015-07-10","validTo":"2025-06-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|0119681|2015-07-10|2025-06-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"operator","id":"L06525","name":"Frehner Construction Company Inc"},"validFrom":"2015-07-10","validTo":"2025-06-22","current":false,"derived":true,"evidenceMineId":"4202223","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|L06525|1998-09-01|0119681|2015-07-10|23130"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0193740","name":"Amrize Ltd"},"object":{"type":"mine","id":"4202223","name":"PORTABLE SCREEN PLANT #1009"},"validFrom":"2025-06-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|0193740|2025-06-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0193740","name":"Amrize Ltd"},"object":{"type":"operator","id":"L06525","name":"Frehner Construction Company Inc"},"validFrom":"2025-06-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"4202223","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4202223|L06525|1998-09-01|0193740|2025-06-23|41419"}}],"coverage":{"historyRecords":5,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4202223","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"}}