{"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":"2103697","name":"Wabasha Pit & Mill Portable Crusher #1"},"operator":{"type":"operator","id":"L39957","name":"Wabasha Sand Gravel & Ready Mixed Company"},"controller":{"type":"controller","id":"0181543","name":"Kohner Holding Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09428","name":"Robert S  Kohner et al"},"object":{"type":"mine","id":"2103697","name":"Wabasha Pit & Mill Portable Crusher #1"},"validFrom":"1950-01-01","validTo":"2023-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|M09428|1950-01-01|2023-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0068631","name":"Timothy J.  Kohner et al"},"object":{"type":"mine","id":"2103697","name":"Wabasha Pit & Mill Portable Crusher #1"},"validFrom":"2007-06-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|0068631|2007-06-07|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0081524","name":"KB Materials"},"object":{"type":"mine","id":"2103697","name":"Wabasha Pit & Mill Portable Crusher #1"},"validFrom":"2010-05-16","validTo":"2016-08-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|0081524|2010-05-16|2016-08-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0068631","name":"Timothy J.  Kohner et al"},"object":{"type":"operator","id":"0081524","name":"KB Materials"},"validFrom":"2010-05-16","validTo":"2016-08-09","current":false,"derived":true,"evidenceMineId":"2103697","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|0081524|2010-05-16|0068631|2007-06-07|9694"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0068631","name":"Tony A  Kohner et al"},"object":{"type":"operator","id":"0081524","name":"KB Materials"},"validFrom":"2010-05-16","validTo":"2016-08-09","current":false,"derived":true,"evidenceMineId":"2103697","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|0081524|2010-05-16|0068631|2007-06-07|9695"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L39957","name":"Wabasha Sand Gravel & Ready Mixed Company"},"object":{"type":"mine","id":"2103697","name":"Wabasha Pit & Mill Portable Crusher #1"},"validFrom":"2016-08-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|L39957|2016-08-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09428","name":"Robert S  Kohner et al"},"object":{"type":"operator","id":"L39957","name":"Wabasha Sand Gravel & Ready Mixed Company"},"validFrom":"2016-08-10","validTo":"2023-12-31","current":false,"derived":true,"evidenceMineId":"2103697","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|L39957|2016-08-10|M09428|1950-01-01|146394"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09428","name":"Steven  Kohner et al"},"object":{"type":"operator","id":"L39957","name":"Wabasha Sand Gravel & Ready Mixed Company"},"validFrom":"2016-08-10","validTo":"2023-12-31","current":false,"derived":true,"evidenceMineId":"2103697","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|L39957|2016-08-10|M09428|1950-01-01|146395"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0181543","name":"Kohner Holding Company"},"object":{"type":"mine","id":"2103697","name":"Wabasha Pit & Mill Portable Crusher #1"},"validFrom":"2024-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|0181543|2024-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0181543","name":"Kohner Holding Company"},"object":{"type":"operator","id":"L39957","name":"Wabasha Sand Gravel & Ready Mixed Company"},"validFrom":"2024-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2103697","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103697|L39957|2016-08-10|0181543|2024-01-01|38826"}}],"coverage":{"historyRecords":5,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2103697","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"}}