{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-17T06:17:15.228Z","identity":{"mine_id":"4500191","name":"Tonasket Quarry","status":"Active","status_date":"1978-12-26","mine_type":"Surface","coal_metal":"M","commodity":"Crushed, Broken Limestone NEC","state":"WA","county":"Okanogan","nearest_town":"Tonasket","operator_id":"L13760","operator_name":"Pacific Calcium Inc","controller_id":"M10498","controller_name":"MacDonald Development Corporation","district":"M7","office":"Kent WA Field Office","employees":22,"latitude":48.7975,"longitude":-119.515},"coverage":{"contributingSources":13,"registeredSources":20,"sourceRows":777},"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":"4500191","name":"Tonasket Quarry"},"operator":{"type":"operator","id":"L13760","name":"Pacific Calcium Inc"},"controller":{"type":"controller","id":"M10498","name":"MacDonald Development Corporation"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13760","name":"Pacific Calcium Inc"},"object":{"type":"mine","id":"4500191","name":"Tonasket 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":"4500191|L13760|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10498","name":"MacDonald Development Corporation et al"},"object":{"type":"mine","id":"4500191","name":"Tonasket 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":"4500191|M10498|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10498","name":"MacDonald Development Corporation et al"},"object":{"type":"operator","id":"L13760","name":"Pacific Calcium Inc"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4500191","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4500191|L13760|1950-01-01|M10498|1950-01-01|149400"}}],"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":46,"firstDate":"2001-10-17","lastDate":"2026-09-18","metrics":{"daysLost":1098,"injuries":44,"fatalities":0,"recentRows":14,"restrictedDays":928,"contractorRecords":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"261608","DOCUMENT_NO":"220262660021","ACCIDENT_DT":"09/18/2026","DEGREE_INJURY":"NO DYS AWY FRM WRK,NO RSTR ACT","CLASSIFICATION":"MACHINERY","ACCIDENT_TYPE":"Struck by flying object","OCCUPATION":"Plumber, Pipefitter, Millwright","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"Miner was cutting a handrail section with a 4\" grinder and felt irritation in left eye. 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