{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"2401558","name":"Browns Gulch Placer","status":"Abandoned","status_date":"1995-09-01","mine_type":"Surface","coal_metal":"M","commodity":"Gold Ore","state":"MT","county":"Madison","nearest_town":"","operator_id":"L13132","operator_name":"Great Rocky Mountain Mining Corp","controller_id":"M10035","controller_name":"Hamilton Rex & Kenneth","district":"M6","office":"Helena MT Field Office","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":3,"registeredSources":20,"sourceRows":6},"relationships":{"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":"2401558","name":"Browns Gulch Placer"},"operator":{"type":"operator","id":"L13132","name":"Great Rocky Mountain Mining Corp"},"controller":{"type":"controller","id":"M10035","name":"Hamilton Rex & Kenneth"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05965","name":"3 T Corp"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1980-08-01","validTo":"1982-08-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L05965|1980-08-01|1982-08-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04790","name":"Taylor Ralph M"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1980-08-01","validTo":"1982-08-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|M04790|1980-08-01|1982-08-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04790","name":"Taylor Ralph M"},"object":{"type":"operator","id":"L05965","name":"3 T Corp"},"validFrom":"1980-08-01","validTo":"1982-08-03","current":false,"derived":true,"evidenceMineId":"2401558","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L05965|1980-08-01|M04790|1980-08-01|132824"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05966","name":"Montana Minerals"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1982-08-04","validTo":"1987-06-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L05966|1982-08-04|1987-06-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04791","name":"Coordinated Financial Services-Karl D Blomquist Et"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1982-08-04","validTo":"1987-06-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|M04791|1982-08-04|1987-06-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04791","name":"Coordinated Financial Services-Karl D Blomquist Et"},"object":{"type":"operator","id":"L05966","name":"Montana Minerals"},"validFrom":"1982-08-04","validTo":"1987-06-09","current":false,"derived":true,"evidenceMineId":"2401558","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L05966|1982-08-04|M04791|1982-08-04|132825"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09734","name":"Brown'S Gulch Mining Inc"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1987-06-10","validTo":"1993-07-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L09734|1987-06-10|1993-07-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07628","name":"Taylor S Companies Inc"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1987-06-10","validTo":"1993-07-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|M07628|1987-06-10|1993-07-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07628","name":"Taylor S Companies Inc"},"object":{"type":"operator","id":"L09734","name":"Brown'S Gulch Mining Inc"},"validFrom":"1987-06-10","validTo":"1993-07-13","current":false,"derived":true,"evidenceMineId":"2401558","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L09734|1987-06-10|M07628|1987-06-10|141660"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13132","name":"Great Rocky Mountain Mining Corp"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1993-07-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L13132|1993-07-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10035","name":"Hamilton Rex & Kenneth Et Al"},"object":{"type":"mine","id":"2401558","name":"Browns Gulch Placer"},"validFrom":"1993-07-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|M10035|1993-07-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10035","name":"Hamilton Rex & Kenneth Et Al"},"object":{"type":"operator","id":"L13132","name":"Great Rocky Mountain Mining Corp"},"validFrom":"1993-07-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"2401558","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2401558|L13132|1993-07-14|M10035|1993-07-14|148206"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"1995-09-01","lastDate":"1995-09-01","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":4,"firstDate":"1980-08-01","lastDate":"1993-07-14","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":3},"periods":{},"recentRecords":[]},{"id":"msha-mines","name":"Mines","domains":["identity","production","logistics"],"products":["mine identity","status","commodity","location","operator and controller"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{},"recentRecords":[]}],"safety":{"href":"/api/v1/mines/2401558/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2401558/silica","description":"Dedicated silica records, measurements, sample status and trends. Defaults to the snapshot year; use year=all for history."},"externalContext":{"eia":null,"title30":{"snapshot":{"chapterCount":6,"featuredSectionCount":100,"latestAmendedOn":"2026-08-14","latestIssueDate":"2026-08-14","partCount":206,"sectionCount":5954,"upToDateAsOf":"2026-08-19"},"regulations":[],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"2401558","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}