EMPLOYEE REPORTED ISSUE ON 07/15/2024 BUT DID NOT GO TO THE DOCTOR. EMPLOYEE THEN CONTACTED REPRESENTATIVE AT DOE RUN ON 09/23/2024 ABOUT HAVING ISSUES. EMPLOYEE DID NOT GO ON LIGHT DUTY UNTIL AFTER EE'S SURGERY ON 06/04/2025. EMPLOYEE STATES EE WAS MUCKING AND HAULING OUT OF A ROUGH AREA IN THE MINE. AFTER THIS THE EMPLOYEE STARTED HAVING LOWER BACK ISSUES.