{"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":"4102813","name":"Clark Pit"},"operator":{"type":"operator","id":"L11092","name":"Laredo Sand & Gravel"},"controller":{"type":"controller","id":"M08583","name":"Rodolfo  Garcia"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06160","name":"H E Reeves Inc"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1979-01-01","validTo":"1982-09-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L06160|1979-01-01|1982-09-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04915","name":"Reeves H E"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1979-01-01","validTo":"1982-09-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|M04915|1979-01-01|1982-09-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04915","name":"Reeves H E"},"object":{"type":"operator","id":"L06160","name":"H E Reeves Inc"},"validFrom":"1979-01-01","validTo":"1982-09-27","current":false,"derived":true,"evidenceMineId":"4102813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L06160|1979-01-01|M04915|1979-01-01|133204"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06161","name":"Victor M Solis Ready Mix"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1982-09-28","validTo":"1987-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L06161|1982-09-28|1987-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04916","name":"Solis Victor M"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1982-09-28","validTo":"1987-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|M04916|1982-09-28|1987-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04916","name":"Solis Victor M"},"object":{"type":"operator","id":"L06161","name":"Victor M Solis Ready Mix"},"validFrom":"1982-09-28","validTo":"1987-05-31","current":false,"derived":true,"evidenceMineId":"4102813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L06161|1982-09-28|M04916|1982-09-28|133206"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08583","name":"Rodolfo  Garcia et al"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1984-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|M08583|1984-08-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09744","name":"Bravo Materials Inc"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1987-06-01","validTo":"1989-05-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L09744|1987-06-01|1989-05-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07637","name":"Gloria B  Solis"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1987-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|M07637|1987-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07637","name":"Gloria B  Solis"},"object":{"type":"operator","id":"L09744","name":"Bravo Materials Inc"},"validFrom":"1987-06-01","validTo":"1989-05-22","current":false,"derived":true,"evidenceMineId":"4102813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L09744|1987-06-01|M07637|1987-06-01|141674"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11092","name":"Laredo Sand & Gravel"},"object":{"type":"mine","id":"4102813","name":"Clark Pit"},"validFrom":"1989-05-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L11092|1989-05-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08583","name":"Rodolfo  Garcia et al"},"object":{"type":"operator","id":"L11092","name":"Laredo Sand & Gravel"},"validFrom":"1989-05-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"4102813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4102813|L11092|1989-05-23|M08583|1984-08-01|143679"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4102813","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"}}