{"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":"2602230","name":"BOULDER CITY DETENTION POND"},"operator":{"type":"operator","id":"L14416","name":"Dbe Excavating Inc"},"controller":{"type":"controller","id":"M06268","name":"Dale S  Andersen"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L32481","name":"Dbe Excavating Inc"},"object":{"type":"mine","id":"2602230","name":"BOULDER CITY DETENTION POND"},"validFrom":"1993-05-01","validTo":"1995-10-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2602230|L32481|1993-05-01|1995-10-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M32481","name":"Leavitt Margaret"},"object":{"type":"mine","id":"2602230","name":"BOULDER CITY DETENTION POND"},"validFrom":"1993-05-01","validTo":"1995-10-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2602230|M32481|1993-05-01|1995-10-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M32481","name":"Leavitt Margaret"},"object":{"type":"operator","id":"L32481","name":"Dbe Excavating Inc"},"validFrom":"1993-05-01","validTo":"1995-10-26","current":false,"derived":true,"evidenceMineId":"2602230","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2602230|L32481|1993-05-01|M32481|1993-05-01|160937"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14416","name":"Dbe Excavating Inc"},"object":{"type":"mine","id":"2602230","name":"BOULDER CITY DETENTION POND"},"validFrom":"1995-10-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2602230|L14416|1995-10-27|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06268","name":"Dale S  Andersen"},"object":{"type":"mine","id":"2602230","name":"BOULDER CITY DETENTION POND"},"validFrom":"1995-10-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2602230|M06268|1995-10-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06268","name":"Dale S  Andersen"},"object":{"type":"operator","id":"L14416","name":"Dbe Excavating Inc"},"validFrom":"1995-10-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"2602230","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2602230|L14416|1995-10-27|M06268|1995-10-27|138036"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2602230","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"}}