{"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":"4500011","name":"TILBURY QUARRY"},"operator":{"type":"operator","id":"L17551","name":"Tilbury Cement Company"},"controller":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08222","name":"Columbia Northwest Corp"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1950-01-01","validTo":"1985-08-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L08222|1950-01-01|1985-08-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00049","name":"Ashland Inc"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1950-01-01","validTo":"1985-08-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|M00049|1950-01-01|1985-08-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00049","name":"Ashland Inc"},"object":{"type":"operator","id":"L08222","name":"Columbia Northwest Corp"},"validFrom":"1950-01-01","validTo":"1985-08-28","current":false,"derived":true,"evidenceMineId":"4500011","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L08222|1950-01-01|M00049|1950-01-01|102558"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08223","name":"Columbia Northwest Corp"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1985-08-29","validTo":"1993-08-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L08223|1985-08-29|1993-08-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04764","name":"Michael  Carlow  et al"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1985-08-29","validTo":"1993-08-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|M04764|1985-08-29|1993-08-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04764","name":"Michael  Carlow  et al"},"object":{"type":"operator","id":"L08223","name":"Columbia Northwest Corp"},"validFrom":"1985-08-29","validTo":"1993-08-01","current":false,"derived":true,"evidenceMineId":"4500011","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L08223|1985-08-29|M04764|1985-08-29|132689"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03174","name":"Cimenteries Cbr Cementbedrijven"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1987-09-24","validTo":"2000-07-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|M03174|1987-09-24|2000-07-20"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10594","name":"Tilbury Cement Company"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1993-08-02","validTo":"1999-09-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L10594|1993-08-02|1999-09-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03174","name":"Cimenteries Cbr Cementbedrijven"},"object":{"type":"operator","id":"L10594","name":"Tilbury Cement Company"},"validFrom":"1993-08-02","validTo":"1999-09-24","current":false,"derived":true,"evidenceMineId":"4500011","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L10594|1993-08-02|M03174|1987-09-24|128155"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17077","name":"Park Construction Inc"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1999-09-25","validTo":"2001-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L17077|1999-09-25|2001-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13019","name":"Dan  Park"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"1999-09-25","validTo":"2001-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|M13019|1999-09-25|2001-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13019","name":"Dan  Park"},"object":{"type":"operator","id":"L17077","name":"Park Construction Inc"},"validFrom":"1999-09-25","validTo":"2001-05-31","current":false,"derived":true,"evidenceMineId":"4500011","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L17077|1999-09-25|M13019|1999-09-25|155163"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"2000-07-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|M00004|2000-07-21|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17551","name":"Tilbury Cement Company"},"object":{"type":"mine","id":"4500011","name":"TILBURY QUARRY"},"validFrom":"2001-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L17551|2001-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L17551","name":"Tilbury Cement Company"},"validFrom":"2001-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4500011","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500011|L17551|2001-06-01|M00004|2000-07-21|100562"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4500011","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"}}