{"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":"4105537","name":"1159 Academy"},"operator":{"type":"operator","id":"0186653","name":"Arcosa Aggregates Texas, LLC"},"controller":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09571","name":"Trinity Industries Inc"},"object":{"type":"mine","id":"4105537","name":"1159 Academy"},"validFrom":"1991-12-01","validTo":"2018-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|M09571|1991-12-01|2018-10-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"mine","id":"4105537","name":"1159 Academy"},"validFrom":"2018-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|0144281|2018-11-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13225","name":"Arcosa Aggregates Inc"},"object":{"type":"mine","id":"4105537","name":"1159 Academy"},"validFrom":"2020-12-11","validTo":"2022-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|L13225|2020-12-11|2022-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"operator","id":"L13225","name":"Arcosa Aggregates Inc"},"validFrom":"2020-12-11","validTo":"2022-12-31","current":false,"derived":true,"evidenceMineId":"4105537","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|L13225|2020-12-11|0144281|2018-11-01|29285"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09571","name":"Trinity Industries Inc"},"object":{"type":"operator","id":"L13225","name":"Arcosa Aggregates Inc"},"validFrom":"2020-12-11","validTo":"2018-10-31","current":false,"derived":true,"evidenceMineId":"4105537","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|L13225|2020-12-11|M09571|1991-12-01|146733"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0186653","name":"Arcosa Aggregates Texas, LLC"},"object":{"type":"mine","id":"4105537","name":"1159 Academy"},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|0186653|2023-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"mine","id":"4105537","name":"1159 Academy"},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|0144281|2023-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"operator","id":"0186653","name":"Arcosa Aggregates Texas, LLC"},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4105537","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4105537|0186653|2023-01-01|0144281|2023-01-01|29403"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4105537","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"}}