{"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":"2301277","name":"K C METRO"},"operator":{"type":"operator","id":"L14715","name":"Limpus Quarries Inc"},"controller":{"type":"controller","id":"M06183","name":"CRH PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00871","name":"Alrok Quarries Ltd"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1950-01-01","validTo":"1983-05-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L00871|1950-01-01|1983-05-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00731","name":"Kcor Inc  et al"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1950-01-01","validTo":"1983-05-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|M00731|1950-01-01|1983-05-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00731","name":"Kcor Inc  et al"},"object":{"type":"operator","id":"L00871","name":"Alrok Quarries Ltd"},"validFrom":"1950-01-01","validTo":"1983-05-18","current":false,"derived":true,"evidenceMineId":"2301277","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L00871|1950-01-01|M00731|1950-01-01|114520"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06551","name":"Astro Quarries"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1983-05-19","validTo":"1992-01-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L06551|1983-05-19|1992-01-02"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05213","name":"Paul L  Roberts"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1983-05-19","validTo":"1992-01-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|M05213|1983-05-19|1992-01-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05213","name":"Paul L  Roberts"},"object":{"type":"operator","id":"L06551","name":"Astro Quarries"},"validFrom":"1983-05-19","validTo":"1992-01-02","current":false,"derived":true,"evidenceMineId":"2301277","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L06551|1983-05-19|M05213|1983-05-19|133945"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12466","name":"Metropolitan Quarries Inc"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1992-01-03","validTo":"1996-08-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L12466|1992-01-03|1996-08-06"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00547","name":"Harlan L  Limpus et al"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1992-01-03","validTo":"1996-08-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|M00547|1992-01-03|1996-08-06"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00547","name":"Harlan L  Limpus et al"},"object":{"type":"operator","id":"L12466","name":"Metropolitan Quarries Inc"},"validFrom":"1992-01-03","validTo":"1996-08-06","current":false,"derived":true,"evidenceMineId":"2301277","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L12466|1992-01-03|M00547|1992-01-03|113020"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14715","name":"Limpus Quarries Inc"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1996-08-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L14715|1996-08-07|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00049","name":"Ashland Inc"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"1996-08-07","validTo":"2006-08-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|M00049|1996-08-07|2006-08-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00049","name":"Ashland Inc"},"object":{"type":"operator","id":"L14715","name":"Limpus Quarries Inc"},"validFrom":"1996-08-07","validTo":"2006-08-27","current":false,"derived":true,"evidenceMineId":"2301277","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L14715|1996-08-07|M00049|1996-08-07|102846"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"2301277","name":"K C METRO"},"validFrom":"2006-08-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|M06183|2006-08-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L14715","name":"Limpus Quarries Inc"},"validFrom":"2006-08-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"2301277","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2301277|L14715|1996-08-07|M06183|2006-08-28|137270"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2301277","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"}}