{"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":"2026-10-17T05:35:58.500035+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":"4502704","name":"Central Pit"},"operator":{"type":"operator","id":"L13070","name":"Krieg Construction Inc"},"controller":{"type":"controller","id":"0176341","name":"Krieg Family LLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09126","name":"Karl C  Krieg III  et al"},"object":{"type":"mine","id":"4502704","name":"Central Pit"},"validFrom":"1950-01-01","validTo":"2022-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|M09126|1950-01-01|2022-12-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13071","name":"Christensen Sand & Gravel Company"},"object":{"type":"mine","id":"4502704","name":"Central Pit"},"validFrom":"1979-01-01","validTo":"1993-05-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|L13071|1979-01-01|1993-05-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09994","name":"Christensen Sand & Gravel Company"},"object":{"type":"mine","id":"4502704","name":"Central Pit"},"validFrom":"1979-01-01","validTo":"1993-05-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|M09994|1979-01-01|1993-05-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09994","name":"Christensen Sand & Gravel Company"},"object":{"type":"operator","id":"L13071","name":"Christensen Sand & Gravel Company"},"validFrom":"1979-01-01","validTo":"1993-05-26","current":false,"derived":true,"evidenceMineId":"4502704","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|L13071|1979-01-01|M09994|1979-01-01|148162"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13070","name":"Krieg Construction Inc"},"object":{"type":"mine","id":"4502704","name":"Central Pit"},"validFrom":"1993-05-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|L13070|1993-05-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09126","name":"Karl C  Krieg III  et al"},"object":{"type":"operator","id":"L13070","name":"Krieg Construction Inc"},"validFrom":"1993-05-27","validTo":"2022-12-31","current":false,"derived":true,"evidenceMineId":"4502704","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|L13070|1993-05-27|M09126|1950-01-01|145172"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09126","name":"Darlyne A  Krieg et al"},"object":{"type":"operator","id":"L13070","name":"Krieg Construction Inc"},"validFrom":"1993-05-27","validTo":"2022-12-31","current":false,"derived":true,"evidenceMineId":"4502704","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|L13070|1993-05-27|M09126|1950-01-01|145173"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0176341","name":"Krieg Family LLC"},"object":{"type":"mine","id":"4502704","name":"Central Pit"},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|0176341|2023-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0176341","name":"Krieg Family LLC"},"object":{"type":"operator","id":"L13070","name":"Krieg Construction Inc"},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4502704","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4502704|L13070|1993-05-27|0176341|2023-01-01|37621"}}],"coverage":{"historyRecords":4,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4502704","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}