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

Location : Dakchon Village, Dakcheung District, Sekong Province

Installed Capacity

133 MW

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In Progress

Emoun dam Board of Management

CSE ADMIN

Mr. Preechar Kanthamoon

Managing Director & Vice President

Mr. Vixay sisomvang

Acting Managing Director of Project Delvelopment

Mr. Surachai MIMAE

Project Manager

Mr Bilchaye ABAY

EM&HM Team Leader

Mr. Chalermpol Puriso

Deputy Project Manager (DPM)

Mr. Elbert

Project Control

Mr. Bong Bong

Project Control

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