{"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":"3304078","name":"SPRING VALLEY - 346"},"operator":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"controller":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|M00174|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01678","name":"Ernst Aggregates Inc"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1983-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|M01678|1983-06-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08777","name":"Ernst Aggregates Inc"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1987-01-01","validTo":"1988-08-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L08777|1987-01-01|1988-08-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01678","name":"Ernst Aggregates Inc"},"object":{"type":"operator","id":"L08777","name":"Ernst Aggregates Inc"},"validFrom":"1987-01-01","validTo":"1988-08-19","current":false,"derived":true,"evidenceMineId":"3304078","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L08777|1987-01-01|M01678|1983-06-01|120245"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10470","name":"Ernst Aggregates"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1988-08-20","validTo":"1989-08-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L10470|1988-08-20|1989-08-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01219","name":"Consolidated Gold Fields Limited"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1988-08-20","validTo":"1989-08-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|M01219|1988-08-20|1989-08-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01219","name":"Consolidated Gold Fields Limited"},"object":{"type":"operator","id":"L10470","name":"Ernst Aggregates"},"validFrom":"1988-08-20","validTo":"1989-08-09","current":false,"derived":true,"evidenceMineId":"3304078","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L10470|1988-08-20|M01219|1988-08-20|117550"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11561","name":"Ernst Aggregates"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1989-08-10","validTo":"1990-02-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L11561|1989-08-10|1990-02-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1989-08-10","validTo":"1990-02-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|M00521|1989-08-10|1990-02-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L11561","name":"Ernst Aggregates"},"validFrom":"1989-08-10","validTo":"1990-02-01","current":false,"derived":true,"evidenceMineId":"3304078","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L11561|1989-08-10|M00521|1989-08-10|112551"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11566","name":"American Aggregates Corp"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1990-02-02","validTo":"1997-05-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L11566|1990-02-02|1997-05-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08942","name":"CSR Ltd"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1990-02-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|M08942|1990-02-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08942","name":"CSR Ltd"},"object":{"type":"operator","id":"L11566","name":"American Aggregates Corp"},"validFrom":"1990-02-02","validTo":"1997-05-27","current":false,"derived":true,"evidenceMineId":"3304078","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L11566|1990-02-02|M08942|1990-02-02|144583"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"object":{"type":"mine","id":"3304078","name":"SPRING VALLEY - 346"},"validFrom":"1997-05-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L00208|1997-05-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"validFrom":"1997-05-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"3304078","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304078|L00208|1997-05-28|M00174|1950-01-01|106227"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3304078","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"}}