{"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":"2026-10-17T05:35:58.500035+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":"0203143","name":"Padilla Crush and Screening Plant"},"operator":{"type":"operator","id":"0173014","name":"Southern Arizona Sand and Gravel LLC."},"controller":{"type":"controller","id":"0157963","name":"Zachary  Stam; Miguel  Burrola"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0075943","name":"Arizona General Engineering Contracting Inc"},"object":{"type":"mine","id":"0203143","name":"Padilla Crush and Screening Plant"},"validFrom":"2006-10-23","validTo":"2020-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0203143|0075943|2006-10-23|2020-08-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08471","name":"Laurence  Harvey"},"object":{"type":"mine","id":"0203143","name":"Padilla Crush and Screening Plant"},"validFrom":"2006-10-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0203143|M08471|2006-10-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08471","name":"Laurence  Harvey"},"object":{"type":"operator","id":"0075943","name":"Arizona General Engineering Contracting Inc"},"validFrom":"2006-10-23","validTo":"2020-08-31","current":false,"derived":true,"evidenceMineId":"0203143","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0203143|0075943|2006-10-23|M08471|2006-10-23|143517"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0173014","name":"Southern Arizona Sand and Gravel LLC."},"object":{"type":"mine","id":"0203143","name":"Padilla Crush and Screening Plant"},"validFrom":"2020-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0203143|0173014|2020-09-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0157963","name":"Zachary  Stam et al"},"object":{"type":"mine","id":"0203143","name":"Padilla Crush and Screening Plant"},"validFrom":"2020-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0203143|0157963|2020-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0157963","name":"Zachary  Stam et al"},"object":{"type":"operator","id":"0173014","name":"Southern Arizona Sand and Gravel LLC."},"validFrom":"2020-09-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0203143","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0203143|0173014|2020-09-01|0157963|2020-09-01|32712"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0157963","name":"Miguel  Burrola et al"},"object":{"type":"operator","id":"0173014","name":"Southern Arizona Sand and Gravel LLC."},"validFrom":"2020-09-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0203143","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0203143|0173014|2020-09-01|0157963|2020-09-01|32713"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0203143","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}