{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"3900030","name":"Carnelian #2 Quarry","status":"Active","status_date":"2020-07-23","mine_type":"Surface","coal_metal":"M","commodity":"Dimension Granite","state":"SD","county":"Grant","nearest_town":"Milbank","operator_id":"L00067","operator_name":"Cold Spring Granite Co","controller_id":"0184723","controller_name":"Patrick  Alexander; Michael  O'Connor","district":"M4","office":"Hibbing MN Field Office","employees":3,"latitude":45.209167,"longitude":-96.506667},"coverage":{"contributingSources":15,"registeredSources":20,"sourceRows":515},"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":"3900030","name":"Carnelian #2 Quarry"},"operator":{"type":"operator","id":"L00067","name":"Cold Spring Granite Co"},"controller":{"type":"controller","id":"0184723","name":"Patrick  Alexander; 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