{"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":"2102961","name":"Kasota Quarry"},"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":"2102961","name":"Kasota Quarry"},"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":"2102961|M00174|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07284","name":"William  Brielmaier"},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"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":"2102961|M07284|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14013","name":"Brielmaier Aggregates Inc"},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"validFrom":"1987-05-01","validTo":"1999-04-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|L14013|1987-05-01|1999-04-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07284","name":"William  Brielmaier"},"object":{"type":"operator","id":"L14013","name":"Brielmaier Aggregates Inc"},"validFrom":"1987-05-01","validTo":"1999-04-21","current":false,"derived":true,"evidenceMineId":"2102961","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|L14013|1987-05-01|M07284|1950-01-01|140579"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08107","name":"Larry V  Nurre"},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"validFrom":"1988-07-01","validTo":"2006-03-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|M08107|1988-07-01|2006-03-01"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10403","name":"Southern Minnesota Construction Company, Inc"},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"validFrom":"1999-04-22","validTo":"2008-12-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|L10403|1999-04-22|2008-12-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08107","name":"Larry V  Nurre"},"object":{"type":"operator","id":"L10403","name":"Southern Minnesota Construction Company, Inc"},"validFrom":"1999-04-22","validTo":"2006-03-01","current":false,"derived":true,"evidenceMineId":"2102961","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|L10403|1999-04-22|M08107|1988-07-01|142714"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"validFrom":"2006-03-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|M06183|2006-03-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L10403","name":"Southern Minnesota Construction Company, Inc"},"validFrom":"2006-03-02","validTo":"2008-12-27","current":false,"derived":true,"evidenceMineId":"2102961","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|L10403|1999-04-22|M06183|2006-03-02|137149"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"validFrom":"2008-01-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|M06183|2008-01-03|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0085824","name":"Minnesota Paving & Materials"},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"validFrom":"2008-12-28","validTo":"2026-01-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|0085824|2008-12-28|2026-01-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"0085824","name":"Minnesota Paving & Materials"},"validFrom":"2008-12-28","validTo":"2026-01-12","current":false,"derived":true,"evidenceMineId":"2102961","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|0085824|2008-12-28|M06183|2008-01-03|137482"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16197","name":"Martin Marietta Materials Inc."},"object":{"type":"mine","id":"2102961","name":"Kasota Quarry"},"validFrom":"2026-01-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|L16197|2026-01-13|"}},{"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":"2026-01-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"2102961","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102961|L16197|2026-01-13|M00174|1950-01-01|105982"}}],"coverage":{"historyRecords":5,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2102961","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"}}