- 1971. 01Established Dongbok Office (2 Sections)
- 1985. 07Expanded Dongbok Office (2 Sections → 4 Sections)
- 1987. 05Renamed the office (Dongbok Office → Dongbu Office)
- 1990. 02Renamed due to office reorganization
(Dongbok Office → Yongyeon Water Treatment Plant) - 1998. 09Merged North Gwangju Water Treatment Plant to Yongyeon Water Treatment Plant due to office reorganization
- 1999. 08Merged with DeoknamWater Treatment Plant and renamed due to office reorganization(Yongyeon Water Treatment Plant → Water Treatment Plant)
- 2007. 01Renamed due to office reorganization
(Water Treatment Plant → Yongyeon Water Treatment Plant)
- Location : 591 Dong-gu Yongyeon-dong, Gwangju City
- Site area : 103.094㎡ (total building area 6,943㎡)
- Water source : Dongbok Reservoir (92,000 thousand ㎥)
- Production capacity :240 thousand㎥/day
- Employees : 57 (Regular 17, Technician 18, Security 13, Long-term contract 1, public service personnel 7 )
(Security 13: Yongyeon Water Treatment Plant 4, Shinki Guard Post 3, Imdo (Seongsan) Guard Post 3, 4 Reservoir 3)
