{"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":"2026-10-17T05:35:58.500035+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":"4501999","name":"Heidelberg Materials High Rock Quarry"},"operator":{"type":"operator","id":"0152314","name":"HM Pacific Northwest, Inc."},"controller":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07626","name":"Industrial Rock Products Inc"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"1950-01-01","validTo":"1984-10-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|L07626|1950-01-01|1984-10-04"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06058","name":"Albert J  Firchau"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"1950-01-01","validTo":"1984-10-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|M06058|1950-01-01|1984-10-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06058","name":"Albert J  Firchau"},"object":{"type":"operator","id":"L07626","name":"Industrial Rock Products Inc"},"validFrom":"1950-01-01","validTo":"1984-10-04","current":false,"derived":true,"evidenceMineId":"4501999","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|L07626|1950-01-01|M06058|1950-01-01|136174"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07627","name":"Cadman Rock Company Inc"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"1984-10-05","validTo":"1991-01-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|L07627|1984-10-05|1991-01-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04656","name":"Paul J  Taylor  et al"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"1984-10-05","validTo":"1991-01-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|M04656|1984-10-05|1991-01-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04656","name":"Paul J  Taylor  et al"},"object":{"type":"operator","id":"L07627","name":"Cadman Rock Company Inc"},"validFrom":"1984-10-05","validTo":"1991-01-01","current":false,"derived":true,"evidenceMineId":"4501999","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|L07627|1984-10-05|M04656|1984-10-05|132498"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12266","name":"Cadman (Rock) Inc"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"1991-01-02","validTo":"2023-01-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|L12266|1991-01-02|2023-01-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03174","name":"Cimenteries Cbr Cementbedrijven"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"1991-01-02","validTo":"2000-07-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|M03174|1991-01-02|2000-07-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03174","name":"Cimenteries Cbr Cementbedrijven"},"object":{"type":"operator","id":"L12266","name":"Cadman (Rock) Inc"},"validFrom":"1991-01-02","validTo":"2000-07-20","current":false,"derived":true,"evidenceMineId":"4501999","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|L12266|1991-01-02|M03174|1991-01-02|128199"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"2000-07-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|M00004|2000-07-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L12266","name":"Cadman (Rock) Inc"},"validFrom":"2000-07-21","validTo":"2023-01-30","current":false,"derived":true,"evidenceMineId":"4501999","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|L12266|1991-01-02|M00004|2000-07-21|100591"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"2017-06-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|M00004|2017-06-30|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0152314","name":"HM Pacific Northwest, Inc."},"object":{"type":"mine","id":"4501999","name":"Heidelberg Materials High Rock Quarry"},"validFrom":"2023-01-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|0152314|2023-01-31|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"0152314","name":"HM Pacific Northwest, Inc."},"validFrom":"2023-01-31","validTo":null,"current":true,"derived":true,"evidenceMineId":"4501999","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4501999|0152314|2023-01-31|M00004|2017-06-30|101065"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4501999","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}