{"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":"4502509","name":"LOON LAKE SAND & GRAVEL"},"operator":{"type":"operator","id":"0123353","name":"Loon Lake Sand & Gravel LLC"},"controller":{"type":"controller","id":"M10856","name":"Steve  Herman"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08206","name":"G & C Excavating Inc"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"1950-01-01","validTo":"1985-07-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|L08206|1950-01-01|1985-07-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06530","name":"Forrest  Gardner"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"1950-01-01","validTo":"1985-07-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|M06530|1950-01-01|1985-07-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06530","name":"Forrest  Gardner"},"object":{"type":"operator","id":"L08206","name":"G & C Excavating Inc"},"validFrom":"1950-01-01","validTo":"1985-07-10","current":false,"derived":true,"evidenceMineId":"4502509","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|L08206|1950-01-01|M06530|1950-01-01|138756"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08207","name":"Coombs Sand & Gravel"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"1985-07-11","validTo":"1995-06-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|L08207|1985-07-11|1995-06-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06531","name":"Jon A  Coombs"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"1985-07-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|M06531|1985-07-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06531","name":"Jon A  Coombs"},"object":{"type":"operator","id":"L08207","name":"Coombs Sand & Gravel"},"validFrom":"1985-07-11","validTo":"1995-06-11","current":false,"derived":true,"evidenceMineId":"4502509","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|L08207|1985-07-11|M06531|1985-07-11|138757"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14203","name":"Loon Lake Sand & Gravel Inc"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"1995-06-12","validTo":"2012-06-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|L14203|1995-06-12|2012-06-04"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10856","name":"Steve  Herman"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"1995-06-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|M10856|1995-06-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10856","name":"Steve  Herman"},"object":{"type":"operator","id":"L14203","name":"Loon Lake Sand & Gravel Inc"},"validFrom":"1995-06-12","validTo":"2012-06-04","current":false,"derived":true,"evidenceMineId":"4502509","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|L14203|1995-06-12|M10856|1995-06-12|150169"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0123353","name":"Loon Lake Sand & Gravel LLC"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"2012-06-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|0123353|2012-06-05|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10856","name":"Steve  Herman"},"object":{"type":"mine","id":"4502509","name":"LOON LAKE SAND & GRAVEL"},"validFrom":"2012-06-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|M10856|2012-06-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10856","name":"Steve  Herman"},"object":{"type":"operator","id":"0123353","name":"Loon Lake Sand & Gravel LLC"},"validFrom":"2012-06-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"4502509","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"4502509|0123353|2012-06-05|M10856|2012-06-05|150170"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4502509","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"}}