{"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":"2102413","name":"Aitkin Pit 087"},"operator":{"type":"operator","id":"L03288","name":"Cemstone Products Company"},"controller":{"type":"controller","id":"0187783","name":"Tim L  Becken; Thorwald L  Becken"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02368","name":"Atkin Sand & Gravel Company"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1950-01-01","validTo":"1978-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L02368|1950-01-01|1978-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02074","name":"Atkin Sand & Gravel Company"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1950-01-01","validTo":"1978-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|M02074|1950-01-01|1978-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02074","name":"Atkin Sand & Gravel Company"},"object":{"type":"operator","id":"L02368","name":"Atkin Sand & Gravel Company"},"validFrom":"1950-01-01","validTo":"1978-05-31","current":false,"derived":true,"evidenceMineId":"2102413","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L02368|1950-01-01|M02074|1950-01-01|123599"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02637","name":"Tim L Becken et al"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1950-01-01","validTo":"2025-08-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|M02637|1950-01-01|2025-08-17"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02369","name":"Lamke Sand & Gravel"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1978-06-01","validTo":"1979-05-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L02369|1978-06-01|1979-05-07"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02075","name":"Darryl  L amke"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1978-06-01","validTo":"1979-05-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|M02075|1978-06-01|1979-05-07"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02075","name":"Darryl  L amke"},"object":{"type":"operator","id":"L02369","name":"Lamke Sand & Gravel"},"validFrom":"1978-06-01","validTo":"1979-05-07","current":false,"derived":true,"evidenceMineId":"2102413","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L02369|1978-06-01|M02075|1978-06-01|123600"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03092","name":"Aitkin Ready Mix"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1979-05-08","validTo":"1998-09-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L03092|1979-05-08|1998-09-24"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02494","name":"Dale R  Johnson"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1979-05-08","validTo":"1998-09-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|M02494|1979-05-08|1998-09-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02494","name":"Dale R  Johnson"},"object":{"type":"operator","id":"L03092","name":"Aitkin Ready Mix"},"validFrom":"1979-05-08","validTo":"1998-09-24","current":false,"derived":true,"evidenceMineId":"2102413","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L03092|1979-05-08|M02494|1979-05-08|125679"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03288","name":"Cemstone Products Company"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"1998-09-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L03288|1998-09-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02637","name":"Tim L Becken et al"},"object":{"type":"operator","id":"L03288","name":"Cemstone Products Company"},"validFrom":"1998-09-25","validTo":"2025-08-17","current":false,"derived":true,"evidenceMineId":"2102413","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L03288|1998-09-25|M02637|1950-01-01|126326"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02637","name":"Hammond T Becken et al"},"object":{"type":"operator","id":"L03288","name":"Cemstone Products Company"},"validFrom":"1998-09-25","validTo":"2025-08-17","current":false,"derived":true,"evidenceMineId":"2102413","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L03288|1998-09-25|M02637|1950-01-01|126327"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0187783","name":"Thorwald L  Becken et al"},"object":{"type":"mine","id":"2102413","name":"Aitkin Pit 087"},"validFrom":"2025-08-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|0187783|2025-08-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0187783","name":"Thorwald L  Becken et al"},"object":{"type":"operator","id":"L03288","name":"Cemstone Products Company"},"validFrom":"2025-08-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"2102413","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L03288|1998-09-25|0187783|2025-08-18|40004"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0187783","name":"Tim L  Becken et al"},"object":{"type":"operator","id":"L03288","name":"Cemstone Products Company"},"validFrom":"2025-08-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"2102413","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102413|L03288|1998-09-25|0187783|2025-08-18|40005"}}],"coverage":{"historyRecords":7,"edgeCount":16,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2102413","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"}}