(Portland, OR) -- A worker is dead after falling up to 50 feet into a large tank in Northwest Portland on Monday. The incident happened at a business on Northwest Yeon near the St. Johns Bridge. Portland Fire & Rescue says all hazardous materials had been removed from the tank and the maintenance worker didn't survive the fall. Police, Trauma Intervention Program specialists and the Medical Examiner's office responded. OSHA will also investigate the incident.