{"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":"1100213","name":"Kaskaskia Mine"},"operator":{"type":"operator","id":"L16197","name":"Martin Marietta Materials, Inc."},"controller":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"1100213","name":"Kaskaskia Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|M00174|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07933","name":"Stotz Quarry Inc"},"object":{"type":"mine","id":"1100213","name":"Kaskaskia Mine"},"validFrom":"1950-01-01","validTo":"1985-03-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L07933|1950-01-01|1985-03-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06308","name":"Jo Ann  Stoltz Wild"},"object":{"type":"mine","id":"1100213","name":"Kaskaskia Mine"},"validFrom":"1950-01-01","validTo":"1985-03-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|M06308|1950-01-01|1985-03-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06308","name":"Jo Ann  Stoltz Wild"},"object":{"type":"operator","id":"L07933","name":"Stotz Quarry Inc"},"validFrom":"1950-01-01","validTo":"1985-03-19","current":false,"derived":true,"evidenceMineId":"1100213","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L07933|1950-01-01|M06308|1950-01-01|138201"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07934","name":"Kaskaskia Stone Company"},"object":{"type":"mine","id":"1100213","name":"Kaskaskia Mine"},"validFrom":"1985-03-20","validTo":"1997-02-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L07934|1985-03-20|1997-02-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06309","name":"Richard  Hurst  et al"},"object":{"type":"mine","id":"1100213","name":"Kaskaskia Mine"},"validFrom":"1985-03-20","validTo":"1997-02-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|M06309|1985-03-20|1997-02-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06309","name":"Richard  Hurst  et al"},"object":{"type":"operator","id":"L07934","name":"Kaskaskia Stone Company"},"validFrom":"1985-03-20","validTo":"1997-02-25","current":false,"derived":true,"evidenceMineId":"1100213","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L07934|1985-03-20|M06309|1985-03-20|138212"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"object":{"type":"mine","id":"1100213","name":"Kaskaskia Mine"},"validFrom":"1997-02-26","validTo":"2005-05-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L00208|1997-02-26|2005-05-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"validFrom":"1997-02-26","validTo":"2005-05-18","current":false,"derived":true,"evidenceMineId":"1100213","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L00208|1997-02-26|M00174|1950-01-01|105696"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16197","name":"Martin Marietta Materials, Inc."},"object":{"type":"mine","id":"1100213","name":"Kaskaskia Mine"},"validFrom":"2005-05-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L16197|2005-05-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L16197","name":"Martin Marietta Materials, Inc."},"validFrom":"2005-05-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"1100213","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1100213|L16197|2005-05-19|M00174|1950-01-01|105697"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1100213","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"}}