PROJECT COST
$235 M
AVERAGE ANNUAL ENERGY
460.59 GWh
DAM HEIGHT
25.6 M
CATCHMENT AREA
Diversion Dam 254 Km2
Main Dam 208 Km2
Installed Capacity
131 MW
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- ORGANIZATION CHART
- Board of Management
- GENERAL INFORMATION
- TECHNICAL STRUCTURE
- HYDRO-ELECTRO-MECHANICAL INFORMATION
- Project legislative documents
- Contractor
- Project milestones
In Progress
Project Cost | $235 Million |
Shareholder | CSE 100% |
Installed Capacity | 133 MW |
Average Annual Energy | 431.8 GWh |
Maximum Turbine Discharge | 37 m3/s |
Rated Head | 397 m |
Turbine Type | Vertical Pleton x 2 Units |
Offertaker | EVN |
Catchment Area | Diversion Dam 254 Km2Main Dam 208 Km2 |
Annual Average Rain Fall | Diversion Dam 2,720 mm Main Dam 2,670 mm |
Annual Average Discharge | Diversion Dam 11.4 m3/s Main Dam 9.3 m3/s |
Reservoir Storage Capacity | Diversion Dam 0.87 Million m3 Main Dam 0.07 Million m3 |
Reservoir Surface Area | Diversion Dam 0.16 Km2 Main Dam 0.02 Km2 |
Full Supply Level | Diversion Dam 784.1 m a.s.l Main Dam 782 m a.s.l |
Minimum Operating Level | Diversion Dam 782 m a.s.l Main Dam 780 m a.s.l |
Diversion Dam | |
Type | Concrete Gravity |
Height | 29 m |
Crest Length | 127 m |
Crest level | 790.2 m a.s.l |
Main Dam | |
Type | Concrete Gravity |
Height | 26.6 m |
Crest Length | 87.5 m |
Crest level | 792.2 m a.s.l |
Headrace Channel | |
Type | |
Length | |
Longitudinal Gradient |
Headrace Tunnel | |
Type | Concrete Lining |
Design Discharge: | 76.2 m3/s |
Diameter | 5.4 – 4.2 m |
Length | 1,430 m |
Penstock | |
Type | Steel Liner |
Number of Pipe | 1 |
Diameter | 2.8 m |
Length | 934 m |
Longitudinal Gradient |
Spillway-Main Dam | |
Type | Gated |
Number of Gate | 3 |
Design Flood Discharge | |
Max. inflow peak |
Spillway-Diversion Dam | |
Type | Gated |
Number of Gate | 3 |
Conveyance Tunnel | |
Type | Free-Flow |
Design Discharge | – |
Diameter | 4.5m x 5.5m Horseshoe |
Length | 13,121 m |
Low Pressure Tunnel | |
Type | Compress the pressure |
Design Discharge | – |
Diameter | 4.5m x 5m Horseshoe |
Length | 3,452 m |
Tailrace Channel | |
Type | The canal is open |
Length |
Switchyard 230 kV | |
Elevation | |
Dimension |
Powerhouse | |
Type | Ground cover |
Installed Capacity | 131 MW |
Number of Unit | 2 |
Turbine Type | Pentagon vertical Axis X 2 Units |
Max Powerhouse Discharge | 37 m3/S |
Erection Floor Elevation |
230 KV Transmission Line | |
Substation | Vong Xang (Sekong II) |
Length | 51 Km |
Circuit Type | Double Circuit |
Conductor Size | 240 mm2 |
Legislative documents
- Signed a Memorandum of Understanding (MOU) with the Government of the Lao PDR.
- Project Development Agreement (PDA) was signed in July 2015
- The Feasibility study of the project was approved in December 2017
- Completed the report of Environmental and Social Impact Assessment (ESIA) in November 2017
- Completed the Environmental and Social Management and Monitoring Plans (ESMMP) in July 2017
- Completed the Environmental and Social Management and Monitoring Plans-construction Phase (ESMMP-CP) in December 2018
- Completed the preparation of biomass removal plans and approved the plans for November 2019
- Signed a power purchase agreement (PPA) with the Electricity of Vietnam (EVN) on January 04, 2020
- Signed a concession agreement (CA) with the Government of the Lao PDR on December 25, 2020
Construction contractor
- Civil construction work
- waterways mechanical construction works
- electro-mechanical constructions
- Project Owner: Chaleun sekong., co.LTD
- Construction design company: Poyry Energy Ltd
- Consulting company: ILF Consulting Engineers (Asia) Ltd
- Civil work contractor: SongDa-5 Joint Stock Company
- Supply and installation of machinery: VOITH Shanghi Company Ltd
- In 2013, a preliminary survey was conducted by GXED & CGGC, the original owner of the project, TK Group.
- In 2015, the project proposal presentation was submitted by GXED.
- In July 2015, the project proposal presentation was inspected by Pöyry Energy Ltd
- In 2016, the project owner was changed to Chaleun sekong., co.LTD
- In April 2019, a project construction consulting contract was signed with ILF Consultant Engineering
- In December 2018, Song Da-5 Joint Stock Company signed a contract for civil and hydropower work.
- In April 2019, Voith Hydro Shanghai signed a contract for electrical and mechanical installation.
- In April 2019, the original design was redesigned by ILF Consultant
Project milestones
Progress of project construction Pioneering phase
- Survey the area
- Survey and measure water quality
- Paving the road
- Compensate for area damage to people
- Start construction
The Overall construction phases
- Office and project accommodation
- Field Laboratory
- Repair shop
- Main dam
- Diversions Dam
- Tunnel
- Powerhouse
The Overall construction phases
- Office and project accommodation
- Field Laboratory
- Repair shop
- Main dam
- Diversions Dam
- Tunnel
- Powerhouse
Current construction progress overall 2022
- Main dam
- Diversions Dam
- tunnel
- Powerhouse
- Install the generator
- Transmission line construction
Current construction progress overall early 2023
- Main Dam
- Diversion Dam
- Conveyance Tunnel 20km
- ADIT 1
- ADIT 2
- ADIT 3
- Surg Tank
- Portal P7 | Portal P7
- Portal P8 | Portal P8
- Powerhouse
- Mechanical and electrical equipment installation
- Switchyard
- Transmission Line
- Auxiliary projects: Batching Plant, Crushing Plant and Quarry, Warehouse, Camp
Current construction progress overall in 2023 (Q2)
- Water Way Tunnel Construction Invert concrete
- Penstock Civil & Hydromechanical Construction
- Electromechanical Works
- Commissioning System