Ministry of Energy and Mines

Department of Energy Business

Location – Bolikhamxay  province

Commenced operation: 2015

Investors: Lao holding State Enterprise (LHSE) 30%,Kansai Electric & Nippon Keoi (Japan) 50%,EGAT 20%

Planned market: Laos/Thailand

Nam Ngiep 1 Features

1. Hydrology

Q

U

Catchment area

3,700

Km2

Annual mean inflow

147

m3/s

2. Reservoir

Full supply level

320

m

Min. operation level

296

m

Surface area at FSL

66.94

Km2

Gross storage

2,241

MCM

Active storage

1,192

MCM

3. Infrastructure

3.1 Dam type

CFRD

Crest length

513

m

Height

151

m

3.2 Waterway

3.2.1 Headrace Tunnel/Chanel

Length

504

m

Diameter

9

m

3.2.2 Penstock

Length

293

m

Diameter

8 and 4

m

3.3 Transmission line

Voltage

230

KV

Length

125.2

Km

3.4 Access road

Length

33

km

3.5 Tailrace tunnel/chanel

Length

   

4. Power generation

Design discharge

230

m3/s

Gross head

127

m

Installed capacity

280

MW

Annual average energy

1,507

GWh/y

Francis / Pelton

Francis

Units

2

5. Social environment

5.1 People and household affected by the project

Village:

5

Household:

342

People:

2,409

6. Developer

LHSE

25

%

Kansai

45

%

EGAT

30

%