HUAY LA NGAE

PROJECT COST

$147.3 M

AVERAGE ANNUAL ENERGY

289.69 GWh

DAM HEIGHT

1,218 M

CATCHMENT AREA

279.8 Km2

Installed Capacity

60 MW

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Project Cost $147.3 M
Shareholder

Chaleun Sekong Energy CO., LTD 30%

Sekong Development CO., LTD 70%

Installed Capacity 60 MW
Energy Generation 289.69 Gwh
Maximum Turbine 12 m³/s
Design net Head 1,215.18 m
Type of turbine Vertical Pelton
Off-taker EVN
Catchment Area 279.8 km²
Rain flow releases 2,800 mm
Inflow Average 123×106 m3/s
Reservoir 14 M m³
Reservoir Surface Area 93.6 km²
Full supply level 1,215 m a.s.l
Min operating level 1,189 m a.s.l
Main Dam
Type RCC
Height 58 m
Crest Length 182 m
Crest level 782.5 m a.s.l
Water flow channels
Type Inverted U-shaped section
Length 3,990 m
Hills of channels  
Open Channels 2.5 m
convert block 2.5 m

Penstock

Type Steel Lined Tunnel
No of pipe 1
Internal diameter 2 m
Length 2,787.7 m
 
Spillway
Type WES practical weir
No of gate 3
Design Flood Discharge 701 m³/s
Headrace Tunnel
Type Inverted U-shaped section
Flow rate 3.91 %
Internal diameter 2.8m x 3.5m
Length 3,918 m

Station 230 kW GIS (EGAT) / 115 kW

AIS (Electricite du Laos)

Height 586
Ground size 54m x 25m
Powerhouse
Installed Capacity 60 MW
Number of Unit 2
Turbine Type SF30-10/3300
Max Powerhouse Discharge 5.744 m³/s
Superstructure dimensions 581.7 m a.s.l
230KV Transmission Line
Substation Nam E-Moun
Length 41 Km
Circuit Type 1
Conductor Size ACSR 300
 

Legal Documents

  1. On 21/07/2015 Signed a Memorandum of Understanding (MOU)   
  2. On 17/02/2015Project Development Agreement (PDA) was signed
  3. On 14/09/2017The Feasibility study of the project was approved
  4. On 22/11/2016 Completed the report of Environmental and Social Impact Assessment (ESIA)
  5. On 22/11/2016Completed the Environmental and Social Management and Monitoring Plans (ESMMP)
  6. On 01/02/2021 Completed the Environmental and Social Management and Monitoring Plans-construction Phase (ESMMP-CP)
  7. On 14/08/2020 Complete basic design certification issued
  8. On 07/09/2020Completed the investment license
  9. On 30/09/2020Completed the enterprise registration
  10. On 11/11/2020Completed the ratification of the annex to the concession agreement with environmental, social and natural obligations (Annex C-CA)
  11. On 15/01/2019Completion of Environmental Certificate for Renewal of Social and Natural Environmental Management and Monitoring Plan (ESMMP)
  12. On 24/11/2021 Completed the environmental minimum water flow certificate
  13. On 07/05/2021 Completed the environmental certificate for the transmission corridor
  14. On 22/12/2021 Signed a concession agreement with the Government of the Lao PDR

 

  1. EPC contractor: POWERCHINA Sinohydro Bureau 10., Ltd

  2. OE: China Northwest Water Resources and Hydropower Construction Engineering Consulting CO., LTD

 

 

  1. On 21/07/2015 Signed a Memorandum of Understanding (MOU)   
  2. On 17/02/2015Project Development Agreement (PDA) was signed
  3. On 14/09/2017The Feasibility study of the project was approved
  4. On 22/11/2016 Completed the report of Environmental and Social Impact Assessment (ESIA)
  5. On 22/11/2016Completed the Environmental and Social Management and Monitoring Plans (ESMMP)
  6. On 01/02/2021 Completed the Environmental and Social Management and Monitoring Plans-construction Phase (ESMMP-CP)
  7. On 14/08/2020 Complete basic design certification issued
  8. On 07/09/2020Completed the investment license
  9. On 30/09/2020Completed the enterprise registration
  10. On 11/11/2020Completed the ratification of the annex to the concession agreement with environmental, social and natural obligations (Annex C-CA)
  11. On 15/01/2019Completion of Environmental Certificate for Renewal of Social and Natural Environmental Management and Monitoring Plan (ESMMP)
  12. On 24/11/2021 Completed the environmental minimum water flow certificate
  13. On 07/05/2021 Completed the environmental certificate for the transmission corridor
  14. On 22/12/2021 Signed a concession agreement with the Government of the Lao PDR
  15. On 01/04/2023 First Impounding 

 

Project progress

Start Construction Phase:

  • Model and Powerhouse

  • Survey the area

  • Paving the road

  • Building the tunnel

10%

Construction start phase

  • Model and Powerhouse

  • Survey the area

  • Paving the road

  • Building the tunnel

39.72%

Construction in 2022:

  • Main Dam
  • Diversion dam
  • Diversion Tunnel
  • Water Supplement Tunnel
  • Sur shaft
  • Penstock
  • Powerhouse
  • Mechanical and electrical equipment installation
  • Transmission line construction
  • Auxiliary projects

70%

Construction in early 2023:

  • Powerhouse

  • Main Dam

  • Tunnel

  • Water Supply Tunnel

  • Pen Stock

  • Surge Tank

  • Saddle Dam

  • Transmission Line

89.92%

Construction in mid 2023:

  • Powerhouse
  • Main Dam
  • Penstock
  • Surge Tank
  • Saddle Dam

98.9%

Contact Us

CSE Building, Nongbon Road, Unit 8, Nongbon Village, Xaysettha District Vientiane, Lao PDR.

+856 (0) 21 417788 or 417789
headoffice@csenergy.la