{"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":"0401876","name":"Orland Sand & Gravel Corporation"},"operator":{"type":"operator","id":"L36925","name":"Orland Sand & Gravel Corporation"},"controller":{"type":"controller","id":"0041607","name":"Dale R (Doc)  Bogart"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L36925","name":"Orland Sand & Gravel Corporation"},"object":{"type":"mine","id":"0401876","name":"Orland Sand & Gravel Corporation"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0401876|L36925|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M36925","name":"Thomas Donald L"},"object":{"type":"mine","id":"0401876","name":"Orland Sand & Gravel Corporation"},"validFrom":"1950-01-01","validTo":"2002-08-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0401876|M36925|1950-01-01|2002-08-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M36925","name":"Thomas Donald L"},"object":{"type":"operator","id":"L36925","name":"Orland Sand & Gravel Corporation"},"validFrom":"1950-01-01","validTo":"2002-08-30","current":false,"derived":true,"evidenceMineId":"0401876","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0401876|L36925|1950-01-01|M36925|1950-01-01|166149"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041607","name":"Dale R (Doc)  Bogart"},"object":{"type":"mine","id":"0401876","name":"Orland Sand & Gravel Corporation"},"validFrom":"2002-08-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0401876|0041607|2002-08-31|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041607","name":"Dale R (Doc)  Bogart"},"object":{"type":"operator","id":"L36925","name":"Orland Sand & Gravel Corporation"},"validFrom":"2002-08-31","validTo":null,"current":true,"derived":true,"evidenceMineId":"0401876","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0401876|L36925|1950-01-01|0041607|2002-08-31|2805"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0401876","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"}}