{"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":"2026-10-18T09:31:49.615908+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":"2501074","name":"Bygland Sand & Gravel"},"operator":{"type":"operator","id":"0051477","name":"Bygland Sand & Gravel"},"controller":{"type":"controller","id":"0042047","name":"Ivel (Steve)  Bygland; Raelynn  Bygland"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04197","name":"Hoffmeister Frank"},"object":{"type":"mine","id":"2501074","name":"Bygland Sand & Gravel"},"validFrom":"1981-06-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2501074|M04197|1981-06-03|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05196","name":"Loup Gravel Company"},"object":{"type":"mine","id":"2501074","name":"Bygland Sand & Gravel"},"validFrom":"1987-03-01","validTo":"2000-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2501074|L05196|1987-03-01|2000-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04197","name":"Hoffmeister Frank"},"object":{"type":"operator","id":"L05196","name":"Loup Gravel Company"},"validFrom":"1987-03-01","validTo":"2000-06-30","current":false,"derived":true,"evidenceMineId":"2501074","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2501074|L05196|1987-03-01|M04197|1981-06-03|131449"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051477","name":"Bygland Sand & Gravel"},"object":{"type":"mine","id":"2501074","name":"Bygland Sand & Gravel"},"validFrom":"2000-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2501074|0051477|2000-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042047","name":"Ivel (Steve)  Bygland  et al"},"object":{"type":"mine","id":"2501074","name":"Bygland Sand & Gravel"},"validFrom":"2000-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2501074|0042047|2000-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042047","name":"Ivel (Steve)  Bygland  et al"},"object":{"type":"operator","id":"0051477","name":"Bygland Sand & Gravel"},"validFrom":"2000-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2501074","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2501074|0051477|2000-07-01|0042047|2000-07-01|3628"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042047","name":"Raelynn  Bygland  et al"},"object":{"type":"operator","id":"0051477","name":"Bygland Sand & Gravel"},"validFrom":"2000-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2501074","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2501074|0051477|2000-07-01|0042047|2000-07-01|3629"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2501074","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}