Defects of diversion tunnel have been analyzed by using the precise inspection for safety and diagnosis in 7 dams. Leakage from joint, crack, and material segregation is crucial damage in dam as well as crack, corrosion, and drainage system. Maintenances of diversion tunnel have been suggested with common and unique characteristics of defects.

• 추진호(한국시설안전공단 수자원안전실 차장, 박사과정) | Choo, Jin-Ho 교신저자
• 이지승(한국시설안전공단 수자원안전실 직원) | Lee, Ji-Seung
• 이상혁(한국시설안전공단 수자원안전실 대리) | Lee, Sang-Hyeok
• 권혁기(한국시설안전공단 수자원안전실 실장) | Kwon, Hyek-Kee