{"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":"1900504","name":"B R S Inc"},"operator":{"type":"operator","id":"L15793","name":"B R S Inc"},"controller":{"type":"controller","id":"0121061","name":"Joseph A  Arruda"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03844","name":"David R  Smith Jr"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1978-06-01","validTo":"1989-04-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|M03844|1978-06-01|1989-04-05"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06235","name":"Bridgewater Washed Sand & Gravel Company"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1980-05-01","validTo":"1982-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L06235|1980-05-01|1982-10-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04972","name":"Kenneth  Gourdin"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1980-05-01","validTo":"1982-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|M04972|1980-05-01|1982-10-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04972","name":"Kenneth  Gourdin"},"object":{"type":"operator","id":"L06235","name":"Bridgewater Washed Sand & Gravel Company"},"validFrom":"1980-05-01","validTo":"1982-10-31","current":false,"derived":true,"evidenceMineId":"1900504","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L06235|1980-05-01|M04972|1980-05-01|133362"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07241","name":"C & S Sand & Gravel Corp"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1982-11-01","validTo":"1987-03-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L07241|1982-11-01|1987-03-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03844","name":"David R  Smith Jr"},"object":{"type":"operator","id":"L07241","name":"C & S Sand & Gravel Corp"},"validFrom":"1982-11-01","validTo":"1987-03-17","current":false,"derived":true,"evidenceMineId":"1900504","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L07241|1982-11-01|M03844|1978-06-01|130233"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09526","name":"P Bradshaw Corp"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1987-03-18","validTo":"1992-05-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L09526|1987-03-18|1992-05-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07473","name":"Paul W  Bradshaw"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1987-03-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|M07473|1987-03-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07473","name":"Paul W  Bradshaw"},"object":{"type":"operator","id":"L09526","name":"P Bradshaw Corp"},"validFrom":"1987-03-18","validTo":"1992-05-17","current":false,"derived":true,"evidenceMineId":"1900504","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L09526|1987-03-18|M07473|1987-03-18|141334"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12727","name":"J-1 Corp"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1992-05-18","validTo":"1998-03-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L12727|1992-05-18|1998-03-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09757","name":"Jean  Langlois"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1992-05-18","validTo":"1998-03-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|M09757|1992-05-18|1998-03-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09757","name":"Jean  Langlois"},"object":{"type":"operator","id":"L12727","name":"J-1 Corp"},"validFrom":"1992-05-18","validTo":"1998-03-25","current":false,"derived":true,"evidenceMineId":"1900504","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L12727|1992-05-18|M09757|1992-05-18|147467"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15793","name":"B R S Inc"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1998-03-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L15793|1998-03-26|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12039","name":"Joseph A  Arruda et al"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"1998-03-26","validTo":"2015-10-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|M12039|1998-03-26|2015-10-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12039","name":"Joseph A  Arruda et al"},"object":{"type":"operator","id":"L15793","name":"B R S Inc"},"validFrom":"1998-03-26","validTo":"2015-10-25","current":false,"derived":true,"evidenceMineId":"1900504","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L15793|1998-03-26|M12039|1998-03-26|152990"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12039","name":"Daniel G  Kirker et al"},"object":{"type":"operator","id":"L15793","name":"B R S Inc"},"validFrom":"1998-03-26","validTo":"2015-10-25","current":false,"derived":true,"evidenceMineId":"1900504","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L15793|1998-03-26|M12039|1998-03-26|152991"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0121061","name":"Joseph A  Arruda"},"object":{"type":"mine","id":"1900504","name":"B R S Inc"},"validFrom":"2015-10-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|0121061|2015-10-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0121061","name":"Joseph A  Arruda"},"object":{"type":"operator","id":"L15793","name":"B R S Inc"},"validFrom":"2015-10-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"1900504","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900504|L15793|1998-03-26|0121061|2015-10-26|23576"}}],"coverage":{"historyRecords":7,"edgeCount":18,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1900504","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"}}