{"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":"2102418","name":"Kinmount Pit"},"operator":{"type":"operator","id":"L00503","name":"Premier Aggregates Inc"},"controller":{"type":"controller","id":"0161621","name":"Jeff A  Carlson"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00503","name":"Ulland Brothers Inc"},"object":{"type":"mine","id":"2102418","name":"Kinmount Pit"},"validFrom":"1950-01-01","validTo":"1981-07-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L00503|1950-01-01|1981-07-20"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00423","name":"Orlin L  Ofstad et al"},"object":{"type":"mine","id":"2102418","name":"Kinmount Pit"},"validFrom":"1950-01-01","validTo":"2020-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|M00423|1950-01-01|2020-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00423","name":"Orlin L  Ofstad et al"},"object":{"type":"operator","id":"L00503","name":"Ulland Brothers Inc"},"validFrom":"1950-01-01","validTo":"1981-07-20","current":false,"derived":true,"evidenceMineId":"2102418","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L00503|1950-01-01|M00423|1950-01-01|110763"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01968","name":"Michael J Skubic"},"object":{"type":"mine","id":"2102418","name":"Kinmount Pit"},"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":"2102418|M01968|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02237","name":"Premier Aggregates Inc"},"object":{"type":"mine","id":"2102418","name":"Kinmount Pit"},"validFrom":"1981-07-21","validTo":"1983-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L02237|1981-07-21|1983-02-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01968","name":"Michael J Skubic"},"object":{"type":"operator","id":"L02237","name":"Premier Aggregates Inc"},"validFrom":"1981-07-21","validTo":"1983-02-28","current":false,"derived":true,"evidenceMineId":"2102418","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L02237|1981-07-21|M01968|1950-01-01|122415"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00503","name":"Ulland Brothers Inc"},"object":{"type":"mine","id":"2102418","name":"Kinmount Pit"},"validFrom":"1983-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L00503|1983-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00423","name":"Orlin L  Ofstad et al"},"object":{"type":"operator","id":"L00503","name":"Ulland Brothers Inc"},"validFrom":"1983-03-01","validTo":"2020-12-31","current":false,"derived":true,"evidenceMineId":"2102418","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L00503|1983-03-01|M00423|1950-01-01|110764"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0161621","name":"Jeff A  Carlson"},"object":{"type":"mine","id":"2102418","name":"Kinmount Pit"},"validFrom":"2021-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|0161621|2021-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0161621","name":"Jeff A  Carlson"},"object":{"type":"operator","id":"L00503","name":"Ulland Brothers Inc"},"validFrom":"2021-01-01","validTo":"1981-07-20","current":false,"derived":true,"evidenceMineId":"2102418","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L00503|1950-01-01|0161621|2021-01-01|33813"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0161621","name":"Jeff A  Carlson"},"object":{"type":"operator","id":"L00503","name":"Ulland Brothers Inc"},"validFrom":"2021-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2102418","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102418|L00503|1983-03-01|0161621|2021-01-01|33814"}}],"coverage":{"historyRecords":5,"edgeCount":11,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2102418","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"}}