{"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":"0201941","name":"Mesa Plant"},"operator":{"type":"operator","id":"L09652","name":"Mesa Materials Inc"},"controller":{"type":"controller","id":"M05102","name":"Edward C  Levy Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06013","name":"Asphalt Mining & Concrete Company"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1979-01-01","validTo":"1984-04-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L06013|1979-01-01|1984-04-23"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03671","name":"Threse  Sanders"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1979-01-01","validTo":"1984-04-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|M03671|1979-01-01|1984-04-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03671","name":"Threse  Sanders"},"object":{"type":"operator","id":"L06013","name":"Asphalt Mining & Concrete Company"},"validFrom":"1979-01-01","validTo":"1984-04-23","current":false,"derived":true,"evidenceMineId":"0201941","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L06013|1979-01-01|M03671|1979-01-01|129716"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07068","name":"Amcon Materials Company Inc"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1984-04-24","validTo":"1986-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L07068|1984-04-24|1986-08-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00457","name":"Rein-Schultz & Dahl Of Illinois Inc"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1984-04-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|M00457|1984-04-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00457","name":"Rein-Schultz & Dahl Of Illinois Inc"},"object":{"type":"operator","id":"L07068","name":"Amcon Materials Company Inc"},"validFrom":"1984-04-24","validTo":"1986-08-31","current":false,"derived":true,"evidenceMineId":"0201941","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L07068|1984-04-24|M00457|1984-04-24|111311"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08908","name":"Mesa Materials Inc"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1986-09-01","validTo":"1987-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L08908|1986-09-01|1987-07-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00457","name":"Rein-Schultz & Dahl Of Illinois Inc"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1986-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|M00457|1986-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00457","name":"Rein-Schultz & Dahl Of Illinois Inc"},"object":{"type":"operator","id":"L08908","name":"Mesa Materials Inc"},"validFrom":"1986-09-01","validTo":"1987-07-31","current":false,"derived":true,"evidenceMineId":"0201941","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L08908|1986-09-01|M00457|1986-09-01|111314"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05102","name":"Edward C  Levy Jr et al"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1987-04-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|M05102|1987-04-24|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09652","name":"Mesa Materials Inc"},"object":{"type":"mine","id":"0201941","name":"Mesa Plant"},"validFrom":"1987-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L09652|1987-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05102","name":"Edward C  Levy Jr et al"},"object":{"type":"operator","id":"L09652","name":"Mesa Materials Inc"},"validFrom":"1987-08-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0201941","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201941|L09652|1987-08-01|M05102|1987-04-24|133695"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0201941","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"}}