PROJECT COST
$1,335 M
AVERAGE ANNUAL ENERGY
2,638.1 GWh
DAM HEIGHT
177 M
CATCHMENT AREA
13,856 Km2
Installed Capacity
650 MW
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- ORGANIZATION CHART
- GENERAL INFORMATION
- TECHNICAL STRUCTURE
- HYDRO-ELECTRO-MECHANICAL INFORMATION
- Project legislative documents
- Contractor
- Project milestones
| Project Cost | $1,335 Million |
| Shareholder | PSG 32%, CSE 28%, EGCO 25%, EDL-GEN 15% |
| Installed Capacity | 650 MW |
| Average Annual Energy | 2,638.1 GWh |
| Maximum Turbine Discharge | 513.7 m³/s |
| Rated Head | 297 m |
| Turbine Type | Vertical Axis Francis |
| Offertaker | EGAT / EDL |
| Catchment Area | 13,856 Km² |
| Annual Average Rain Fall | 2,496 mm |
| Annual Average Discharge | 320 m³/s |
| Reservoir Storage Capacity | 3,009 Million m³ |
| Reservoir Surface Area | 93.6 Km² |
| Full Supply Level | 292 m a.s.l |
| Minimum Operating Level | 250 m a.s.l |
| Main Dam | |
| Type | RCC (Curved Gravity Dam) |
| height | 177 m |
| Crest width | 8 m |
| Crest level | 297 m a.s.l + 0.75 m high parapet wall |
| River Diversion | |
| Type | Single Tunnel and Overtopping Cofferdams |
| Length | 932 m |
| Tunnel Diameter | 11 m |
| Penstock | |
| Type | Embedded (Pressure Tunnel) |
| Number of Pipe | 1 |
| Diameter | 10 m / 8.95 m / 6.30 m / 4.50 m |
| Length | 565 m (EDL) / 544 m (EGAT) |
| Spillway | |
| Type | Radial Gate |
| Number of gates | 6 |
| Design Flood Discharge | 25,500 m³/s |
| Max. inflow peak | 30,200 m³/s |
| Switchyard 230 kV GIS (EGAT)/115 kV AIS (EDL) | |
| Height | 586 m |
| Ground size | 54 m x 25 m |
| Powerhouse | |
| Type | Pit Powerhouse, 2 pits |
| Installed Capacity | 650 MW |
| Number of Unit | 3 |
| Turbine Type | Vertical Axis Francis |
| Max Powerhouse Discharge | 513.7 m³/s |
| Superstructure dimensions | 25.8 m x 91.10 mx14.8 (WxLxH) |
| 115KV Transmission Line EDL | |
| Substation | Pakxan-Khonsong |
| Length | 7.5 Km |
| Circuit Type | 7.5 Km Double Circuit; 1.5 Km Single Circuit |
| Conductor Size | 795 MCM |
| 500KV Transmission Line EGAT | |
| Substation | Nabong |
| Length | 154 Km |
| Circuit Type | ACSR/GA |
| Conductor Size | 795 MCM |
Project legislative documents
- On March 09, 2012 Signed a Memorandum of Understanding (MOU) with the Government of the Lao PDR
- Project Development Agreement (PDA) was signed on September 09, 2014
- Completed the report of Environmental and Social Impact Assessment (ESIA) on September 16,2014
- Completed the Environmental and Social Management and Monitoring Plans (ESMMP) On September 16, 2014
- The Feasibility study of the project was approved on February 22, 2016
- Signed a concession agreement (CA) with the Government of the Lao PDR on June 14, 2016
- On September 23, 2017, a power purchase agreement was signed with the Electricity Generating Authority of Thailand (EGAT).
- Completed the Environmental and Social Management and Monitoring Plans-construction Phase (ESMMP-CP) on June 19, 2018.
Total recipients and sub-recipients
In Progress
Construction contractor
In Progress
Important steps of the project
- On March 09, 2012 Signed a Memorandum of Understanding (MOU) with the Government of the Lao PDR
- Project Development Agreement (PDA) was signed on September 09, 2014
- Completed the report of Environmental and Social Impact Assessment (ESIA) on September 16,2014
- Completed the Environmental and Social Management and Monitoring Plans (ESMMP) On September 16, 2014
- The Feasibility study of the project was approved on February 22, 2016
- Signed a concession agreement (CA) with the Government of the Lao PDR on June 14, 2016
- On September 23, 2017, a power purchase agreement was signed with the Electricity Generating Authority of Thailand (EGAT).
- Completed the Environmental and Social Management and Monitoring Plans-construction Phase (ESMMP-CP) on June 19, 2018.
- Official Commercial of electricity COD on 12 August 2022.
Project milestones
Main components of dams:
-
- Main dam
- Water intake
- Headrace tunnel
- Powerhouse
- Switch yard
- Transmission line system
Main components of dams:
-
- Main dam
- Water intake
- Headrace tunnel
- Powerhouse
- Switch yard
- Transmission line system
Main components of dams:
-
- Main dam
- Water intake
- Headrace tunnel
- Powerhouse
- Switch yard
- Transmission line system
Main components of dams:
- Main dam
- Water intake
- Headrace tunnel
- Powerhouse
- Switch yard
- Transmission line system
Main components of dams:
- Main dam
- Water intake
- Headrace tunnel
- Powerhouse
- Switch yard
- Transmission line system
