{"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":"2026-10-18T09:31:49.615908+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":"1400543","name":"Wichita Sand and Gravel"},"operator":{"type":"operator","id":"0117666","name":"Cornejo & Sons LLC"},"controller":{"type":"controller","id":"M02046","name":"Summit Materials LLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05990","name":"Ritchie Sand Inc"},"object":{"type":"mine","id":"1400543","name":"Wichita Sand and Gravel"},"validFrom":"1950-01-01","validTo":"2005-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|L05990|1950-01-01|2005-11-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04187","name":"H T  Ritchie"},"object":{"type":"mine","id":"1400543","name":"Wichita Sand and Gravel"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|M04187|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04187","name":"H T  Ritchie"},"object":{"type":"operator","id":"L05990","name":"Ritchie Sand Inc"},"validFrom":"1950-01-01","validTo":"2005-11-30","current":false,"derived":true,"evidenceMineId":"1400543","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|L05990|1950-01-01|M04187|1950-01-01|131400"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"mine","id":"1400543","name":"Wichita Sand and Gravel"},"validFrom":"2001-07-12","validTo":"2015-07-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|M02063|2001-07-12|2015-07-09"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18663","name":"Lafarge North America Inc"},"object":{"type":"mine","id":"1400543","name":"Wichita Sand and Gravel"},"validFrom":"2005-12-01","validTo":"2013-04-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|L18663|2005-12-01|2013-04-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"operator","id":"L18663","name":"Lafarge North America Inc"},"validFrom":"2005-12-01","validTo":"2013-04-01","current":false,"derived":true,"evidenceMineId":"1400543","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|L18663|2005-12-01|M02063|2001-07-12|123453"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02046","name":"Summit Materials LLC"},"object":{"type":"mine","id":"1400543","name":"Wichita Sand and Gravel"},"validFrom":"2011-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|M02046|2011-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0117666","name":"Cornejo & Sons LLC"},"object":{"type":"mine","id":"1400543","name":"Wichita Sand and Gravel"},"validFrom":"2013-04-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|0117666|2013-04-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02046","name":"Summit Materials LLC"},"object":{"type":"operator","id":"0117666","name":"Cornejo & Sons LLC"},"validFrom":"2013-04-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"1400543","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|0117666|2013-04-02|M02046|2011-01-01|122866"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"mine","id":"1400543","name":"Wichita Sand and Gravel"},"validFrom":"2015-07-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|0119681|2015-07-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"operator","id":"L18663","name":"Lafarge North America Inc"},"validFrom":"2015-07-10","validTo":"2013-04-01","current":false,"derived":true,"evidenceMineId":"1400543","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1400543|L18663|2005-12-01|0119681|2015-07-10|23223"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1400543","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}