{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4801191","name":"Lucerne Mill","status":"Active","status_date":"2010-10-01","mine_type":"Surface","coal_metal":"M","commodity":"Bentonite","state":"WY","county":"Hot Springs","nearest_town":"Greybull","operator_id":"L00962","operator_name":"Wyo-Ben Inc","controller_id":"M00822","controller_name":"David  Brown","district":"C09","office":"Gillette WY Field Office","employees":26,"latitude":43.735,"longitude":-108.171944},"coverage":{"contributingSources":15,"registeredSources":20,"sourceRows":696},"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":"4801191","name":"Lucerne Mill"},"operator":{"type":"operator","id":"L00962","name":"Wyo-Ben Inc"},"controller":{"type":"controller","id":"M00822","name":"David  Brown"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00822","name":"David  Brown"},"object":{"type":"mine","id":"4801191","name":"Lucerne Mill"},"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":"4801191|M00822|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00962","name":"Wyo-Ben Inc"},"object":{"type":"mine","id":"4801191","name":"Lucerne Mill"},"validFrom":"1978-03-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801191|L00962|1978-03-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00822","name":"David  Brown"},"object":{"type":"operator","id":"L00962","name":"Wyo-Ben Inc"},"validFrom":"1978-03-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"4801191","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801191|L00962|1978-03-09|M00822|1950-01-01|115019"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-accidents","name":"Accident, Injuries, and Illnesses","domains":["safety","contractors"],"products":["incident trends","severity rates","equipment patterns","peer denominators"],"rowCount":16,"firstDate":"2010-03-17","lastDate":"2026-09-12","metrics":{"daysLost":253,"injuries":16,"fatalities":0,"recentRows":7,"restrictedDays":153,"contractorRecords":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"81650","DOCUMENT_NO":"220262660013","ACCIDENT_DT":"09/12/2026","DEGREE_INJURY":"DAYS RESTRICTED ACTIVITY ONLY","CLASSIFICATION":"HANDLING OF MATERIALS","ACCIDENT_TYPE":"Over-exertion NEC","OCCUPATION":"Ball/Rod/Pebble/Hand/Limestone/Dry mill operator, Roller operator","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"EE was experiencing back pain that EE believed may have occurred from opening a door. 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