{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-17T06:17:15.228Z","identity":{"mine_id":"0400219","name":"Lucerne Valley Plant and Quarry","status":"Active","status_date":"1987-03-24","mine_type":"Surface","coal_metal":"M","commodity":"Crushed, Broken Limestone NEC","state":"CA","county":"San Bernardino","nearest_town":"Lurcerne Valley","operator_id":"L12908","operator_name":"Specialty Minerals Inc","controller_id":"M00362","controller_name":"Minerals Technologies Inc","district":"M7","office":"San Bernardino CA Field Office","employees":86,"latitude":34.367222,"longitude":-116.911389},"coverage":{"contributingSources":15,"registeredSources":20,"sourceRows":3862},"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":"2026-10-17T05:35:58.500035+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":"0400219","name":"Lucerne Valley Plant and Quarry"},"operator":{"type":"operator","id":"L12908","name":"Specialty Minerals Inc"},"controller":{"type":"controller","id":"M00362","name":"Minerals Technologies Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12908","name":"Specialty Minerals Inc"},"object":{"type":"mine","id":"0400219","name":"Lucerne Valley Plant and Quarry"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400219|L12908|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00362","name":"Minerals Technologies Inc"},"object":{"type":"mine","id":"0400219","name":"Lucerne Valley Plant and Quarry"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400219|M00362|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00362","name":"Minerals Technologies Inc"},"object":{"type":"operator","id":"L12908","name":"Specialty Minerals Inc"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0400219","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400219|L12908|1950-01-01|M00362|1950-01-01|110276"}}],"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":121,"firstDate":"2000-02-09","lastDate":"2025-07-10","metrics":{"daysLost":2364,"injuries":119,"fatalities":0,"recentRows":19,"restrictedDays":2239,"contractorRecords":13},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"258548","DOCUMENT_NO":"220251970018","ACCIDENT_DT":"07/10/2025","DEGREE_INJURY":"DAYS RESTRICTED ACTIVITY ONLY","CLASSIFICATION":"STRIKING OR BUMPING","ACCIDENT_TYPE":"Struck against stationary object","OCCUPATION":"Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"Employee exited the cab of a Cat 777 F haul truck, when they stood upright they bumped their head against the truck bed's canopy.","sourceDate":"2025-07-10"},{"SOURCE_ROW_NUMBER":"267080","DOCUMENT_NO":"220243580011","ACCIDENT_DT":"12/13/2024","DEGREE_INJURY":"DYS AWY FRM WRK & RESTRCTD ACT","CLASSIFICATION":"HANDLING OF MATERIALS","ACCIDENT_TYPE":"Over-exertion NEC","OCCUPATION":"Ledgeman/hand, Quarry man","NO_INJURIES":"1","DAYS_LOST":"2","NARRATIVE":"Employee, with the help of coworker who was on the bed of a pickup truck, were unloading a 123 lbs. box from the pickup bed. 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Operator tried to back up but material hit the Dozer. The material shattered the cab door window and minor damage to the loader engine area. The operator drove the Dozer to a safe location before notifying EE' team leader.","sourceDate":"2024-08-09"},{"SOURCE_ROW_NUMBER":"367","DOCUMENT_NO":"220241640004","ACCIDENT_DT":"06/01/2024","DEGREE_INJURY":"INJURIES DUE TO NATURAL CAUSES","CLASSIFICATION":"OTHER","ACCIDENT_TYPE":"NEC","OCCUPATION":"Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech","NO_INJURIES":"1","NARRATIVE":"Employee of 6 months was working on crusher feeder motor the employee removed the guard, and there was more guarding around it so, they had to stretch. Employee was on their knees reaching arm-length away to diagnose and repair the motor. They stayed in that position for approximately 20 minutes. The pain increased gradually, it turned mild after they stood up.","sourceDate":"2024-06-01"},{"SOURCE_ROW_NUMBER":"82151","DOCUMENT_NO":"220240600024","ACCIDENT_DT":"02/14/2024","DEGREE_INJURY":"DAYS RESTRICTED ACTIVITY ONLY","CLASSIFICATION":"HANDLING OF MATERIALS","ACCIDENT_TYPE":"Over-exertion in pulling or pushing objects","OCCUPATION":"Miner, Prospector, NEC","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"Loading a shot, pulling on a hose, hurt shoulder (1st day of treatment 2/22/24).","sourceDate":"2024-02-14"},{"SOURCE_ROW_NUMBER":"202471","DOCUMENT_NO":"220240160013","ACCIDENT_DT":"01/11/2024","DEGREE_INJURY":"DAYS RESTRICTED ACTIVITY ONLY","CLASSIFICATION":"HANDLING OF MATERIALS","ACCIDENT_TYPE":"Caught in, under or between a moving and a stationary object","OCCUPATION":"Miner, Prospector, NEC","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"On Thursday Jan 11th, 2024, a mill employee of 2 years and 11 months of experience went to check on CBE 74 by the tunnels at 03:00am. 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