Hydroelectric Plants in Laos - other provinces

Houay Lamphan Gnai
Location: Xekong
Operator: Electricite du Laos
Configuration: 2 X 44 MW Pelton
Operation: 2015
T/G supplier: ??
EPC: China Gezhouba Group Corp No 2
Quick facts: The project completion ceremony for this HPP in Thataeng district was held on 14 Nov 2015 following commissioning on 3 Sep 2015. It was CGGC's first EPC contract in the country and competed about 2mos ahead of schedule. The cost was about LAK 1.68tnm funded by a loan from China's ExIm Bank.The rockfill, clay-core dam is 75.6m tall and 557m long. Awater intake is about 4km upstream of the dam and a 2,832m HRT runs to the surge tank, which connects to a 850m low-pressure tunnel.A 9km, 115kV transmission tie-line was also built.

Photograph courtesy of China Gezhouba Group Corp
Posted 2 Apr 2017

Houay Ho
Location: Attapeu
Operator: Houay Ho Power Co Ltd
Configuration: 2 X 75-MW Pelton
Operation: 1999
T/G supplier: Sulzer, ABB
EPC: Electrowatt, Daewoo
Quick facts: This is the second Laotian hydro IPP and was originally developed by Daewoo (60%) with Loxely plc and EDL, (20% each). Construction on a 26km access road started in 1993, followed by civil works on an 80m dam and related facilities. Houay Ho was designed for power export and about 95% of the plant’s electricity is sold to EGAT for peaking requirements. Houay Ho came in over budge at about $243mn. In Sep 2001, Tractebel and a Thai partner MCL entered into a share purchase agreement to acquire a controlling stake in Houay Ho from Daewoo and Loxley. The total acquisition price amounted to approximately $140mn.

Photograph courtesy of Eco Power Systems AG
Posted 5 Aug 2006

Houay Xe
Location: Oudomxai
Operator: Ministry of Energy and Mines
Configuration: 1 X 70-kW tubular
Operation: 2005
T/G supplier: ??
EPC: Tokyo Electric Power, Obayashi, Promec
Quick facts: In Jul 2003, Tokyo Electric Power began preliminary research on an innovative solar electric and water-pumping plant serving 10 villages in Oudomxai province. Construction got started in October and the system started up in March 2005. The scheme includes a 100-kWp PV system with 880 panels (upper right in photo) plus the SHP. During the day, the PV panels pump water from the Houay Xa River to an upper reservoir and at night, water is released through the water turbine. NEDO and JICA provided financial assistance for the scheme.

Photograph courtesy of Obayashi
Posted 2 Aug 2014

Nam Dong
Location: Luangprabang
Operator: Electricite du Laos
Configuration: 3 X 340 kW Pelton
Operation: 1970
T/G supplier: Bouvier
EPC: Sogreah, Vianini Lavori

Photograph by massa (Flickr)
Posted 13 Aug 2006

Nam Gnouang
Location: Bolikhamxay
Operator: Theun-Hinboun Power Co Ltd
Configuration: 2 X 30-MW Francis
Operation: 2012
T/G supplier: VA TECH
EPC: Coyne et Bellier, CMC
Quick facts: This project is 27km upstream from the Theun-Hinboun HPP and includes a 65m tall, RCC dam with a crest length of about 500m and the powerhouse. Construction started in Nov 2008 and the units went online in late 2012.

Photograph courtesy of CMC di Ravenna
Posted 27 Jan 2013

Nam Ngiep-2
Location: Xiengkhouang
Operator: Nam Ngiep-2 Power Co Ltd
Configuration: 3 X 60 MW Francis
Operation: 2015
T/G supplier: Toshiba Hydro Power (Hangzhou) Co Ltd
EPC: China International Water & Electric Corp
Quick facts: In Dec 2008, CWE signed a development MOU with EDL for the Nam Ngiep-2 HPP in Phaxay district. The PDA was signed in Aug 2010 and construction got underway in Oct 2011. Development company Nam Ngiep-2 Power Co Ltd is a 90:10 JV of CWE and EDL. The $307mn EPC contract is 80%-funded by a loan from China Development Bank and 20% by CWE. The scheme has a 70.5m tall, 435m long, clay-core rockfill dam. Total investment is expected to be $345mn. The first unit completed its 72hr test run on 6 Aug 2015 and the remaining units completed on14 and 27 Sep, respectively. Average annual energy output is expected to be 723 GWh.

Photo courtesy of China International Water and Electric Corp
Posted 20 Oct 2015

Nam Ngum-2
Location: Xaisomboun
Operator: Nam Ngum 2 Power Co Ltd
Configuration: 3 X 205-MW Francis
Operation: 2011
T/G supplier: Toshiba Hydro Power (Hangzhou) Co
EPC: Mitsui, Alstom Projects India, Ch Karnchang, Pöyry, Colenco
Quick facts: This is a Laotian project for energy export to Thailand. The scheme is 90km north of Vientian and 35km upstream of the Nam Ngum-1 plant. It has a 181m, concrete-faced rockfill dam, an open chute spillway on the right abutment, and a dam-toe powerhouse with the three turbines under a design head of 154.5m. Estimated annual output is 2,218 GWh/yr. Nam Ngum-2 connects to Thailand via a 95km, 230/500kV double circuit line.

Photograph courtesy of CH Karnchang PCL
Re-posted 27 Jan 2013

Nam Ngum-5
Location: Xiengkhouang
Operator: Sinohydro International
Configuration: 2 X 60-MW Francis
Operation: 2012
T/G supplier: Hangzhou Liyuan Power Equipment Co Ltd
EPC: Sinohydro
Quick facts: On 9 Apr 2007, the Ministry of Planning and Investment granted an investment licence to the Nam Ngum-5 project investors, Sinohydro Corp (85%) and EDL (15%). The 25yr BOT concession was the subject of a 2004 MOU. Annual production of some 500 GWh is sold to EDL for domestic consumption. The site is on the Ting River, a right bank tributary of the Nam Ngum River, in mountainous terrain about 300km from Vientiane. The dam is in Luang Prabang and the powerhouse is in Xiengkhouang province. The official construction start ceremony was held in April 2008 with full construction beginning in Oct 2008. The plant was commissioned on 9 Dec 2012, basically to schedule. The RCC Gravity Dam is 104.5m high. The total cost was around $200mn and Sinohydro financed the project.

Photograph courtesy of Sinohydro
Posted 29 May 2013

Nam Ou-2
Location: Luang Prabang
Operator: Nam Ou River Basin Hydropower Co Ltd
Configuration: 3 X 40-MW Francis
Operation: 2015-2016
T/G supplier: Chongqing Water Turbine
EPC: HydroChina Kunming Engineering Corp, Sinohydro
Quick facts: In Apr 2011, Sinohydro signed the “Master Agreement on Nam Ou Hydropower Project,” covering hydropower along the Nam Ou River, one of the country’s largest rivers. The project area is a plateau region in far north-central Laos in a border area south of Jiangcheng, Yunnan province, China. In Aug 2011, Nam Ou River Basin Hydropower Co Ltd was established for the first-phase development with Sinohydro holding 85% of shares and EDL 15%. Concession agreements and draft PPAs were signed in Jun 2012. This was followed by negotiation with China Development Bank and China Export & Credit Insurance Corp covering project financing and insurance. Main civil works began in Oct 2012 on Nam Ou-2, Nam Ou-5, and Nam Ou-6HPPs. The first set at Nam Ou-2 in Nam Bak district went online in Mpv 2015 to schedule. Multiconsult was EDL's engineering consultant on the first phase.

Photograph courtesy of Peter-John Meynell
Posted 13 Nov 2016

Nam Ou-5
Location: Phongsali
Operator: Nam Ou River Basin Hydropower Co Ltd
Configuration: 3 X 80-MW Francis
Operation: 2016
T/G supplier: Toshiba Hydro Power (Hangzhou)
EPC: HydroChina Kunming Engineering Corp, Sinohydro
Quick facts: Nam Ou-5 is in Samphan district. In Jun 2013, THPC was awarded a contract for three 80-MW T/G sets for the project. This has a 74m tall RCC dam and integral power station. The dam is 1km downstream of the confluence of the Nam Po, a right-bank tributary of the Nam Ou, in Muang Sam Phanh county.

Photograph courtesy of Peter-John Meynell
Posted 13 Nov 2016

Nam Ou-6
Location: Phongsali
Operator: Nam Ou River Basin Hydropower Co Ltd
Configuration: 3 X 60-MW Francis
Operation: 2016
T/G supplier: Chongqing Water Turbine
EPC: HydroChina Kunming Engineering Corp, Sinohydro
Quick facts: Nam Ou-6 is close to Phongsali City. The HPP has an 88m tall rockfill dam. Annual production is expected to be about 726 GWh.

Photograph courtesy of Peter-John Meynell
Posted 13 Nov 2016

Nam Theun-2
Location: Bolikhamxai
Operator: Nam Theun 2 Power Co
Configuration: 4 X 230 MW Francis, 2 X 37.5 MW Pelton
Operation: 2010
T/G supplier: Andritz
EPC: MWH, EDF, Nishimatsu Construction, Ital-Thai Development
Quick facts: The site is near Thakhek, Khammouance province, in the narrow waist of Laos some 240km due east of Vientiane. Project headwaters are in the Annamite Mountains along the border with Vietnam and the 450km² reservoir is on the Nakai Plateau behind a 48m gravity dam with a crest length of 320m. The surface powerhouse is at the base of the plateau escarpment about 40km from the dam. The four large sets are for power export via a 130km,double-circuit 230kV transmission line to Thailand and the two small sets serve domestic needs. From the power station, water flows to the Xe Bang Fai River and then to the Mekong. The developer is a consortium of EDF (35%), the Lao government (25%), EGCO, (25%), and Ital-Thai Development (15%). After 25yrs of operation, the plant will revert to the Lao state. Nam Theun-2 commissioned on 15 Mar 2010.

Photograph courtesy of Nam Theun 2 Power Co
Re-posted 17 Mar 2010

Tad Salen
Location: Savannakhet
Operator: Tad Salen Power Co Ltd
Configuration: 2 X 1.6-MW Francis
Operation: 2013
T/G supplier: ??
Quick facts: Tad Salen SHP supplies elctricity to the Xepon town area in Spone district along the Vietnamees frontier. Korea International Cooperation Agency did a feasibility study for the project in 1997. On 22 Jul 2005, an MOU for the SHP was signed by the GOL and SCI Electric Manufacturer Co Ltd. A 22kV line was also built for the project

Photograph courtesy of Tad Salen Power Co Ltd
Posted 8 Feb 2014

Theun-Hinboun 1&2
Location: Bolikhamxay
Operator: Theun-Hinboun Power Co Ltd
Configuration: 2 X 110-MW Francis
Operation: 1998
T/G supplier: Kvaerner, ABB, Kvaerner, Recchi-CMC
EPC: Norconsult AB, CMC
Quick facts: This $240mn, run-of-river project was built by a consortium consisting of EDL (60%) with Nordic Hydropower AB, jointly owned by Statkraft and Vattenfall (20%), and MDX-Lao Co Ltd (20%). Seed money was a $60mn soft loan from the ADB and a Thai banking syndicate provided additional funding along with the Nordic Investment Bank and other export finance institutions in Norway and Sweden. A PPA was signed with EGAT in Jul 1994, construction began in mid-1995, and Theun-Hinboun was commissioned on schedule in Mar 1998. An 85km, double-circuit 230kV line runs to Thakhek on the Lao-Thai border and a further 110km of transmission line connects to the EGAT grid at Sakhon Nakhon. The dam is 25m high.

Photograph courtesy of Statkraft SF
Posted 2 Dec 2001

Location: Xaignabouri
Operator: Xayaburi Power Co Ltd
Configuration: 8 X 175-MW Kaplan
Operation: 2020
T/G supplier: Andritz
EPC: Hydrochina Zhongnan, CH Karnchang, AF Group
Quick facts: In May 2007, the GOL signed an MOU with CH Karnchang for development of the Xayaburi Dam and HPP in Paklay district on the mainstem Mekong, 350km upstream of Vientiane. A PDA for Xayaburi was signed in Nov 2008, a feasibility study was then undertaken by AF Colenco and TEAM Consulting Engineering and Management Co Ltd. The EIA was submitted in Feb 2010 and, in Jul 2010, EGAT and the GOL signed a PPA MOU. This was the first project of this scope to be subject to the Mekong River Commission (MRC) Procedures for Notification, Prior Consultation, and Agreement (PNPCA). In April 2011, the MRC Joint Committee announced that there was no consensus on Xayburi project development. In Jun 2011, the GOL nonetheless gave CH Karnchang the go-ahead to resume preparatory work. Construction on the dam started in Mar 2012, but was stopped for a time 2mos later.

Photograph courtesy of AF Group
Posted 26 Dec 2015

Location: Xekong
Operator: Viet-Lao Power JSC
Configuration: 2 X 145-MW Francis
Operation: 2016
T/G supplier: Andritz
EPC: Song Da
Quick facts:In Mar 2006, the government signed an MOU with Viet-Lao Power for a feasibility study for the Xekaman-1 project upstream of Xekaman-3 on the Xekaman River, 85km upstream of its confluence with the Xekong River at Attapeu town. The project was originally developed by Tasmania’s HydroElectric Corp under an MOU dating to March 1994. The original CA with Anscan International was terminated in 2005. As originally configured, the plan would have an 184m dam in a narrow gorge. In Dec 2010, a PPA was signed with Vietnamese buyers and a new concession agreement was signed in Oct 2011 with Viet-Lao Power. In May 2012, Song Da with Vietnam Agribank for a state investment credit for Xekaman-1. The plant cost $539.46mn. Construction got underway in Mar 2011 and Unit-1 commissioned on 29 Nov 2016. The plant connects at 230kV to the Pleiku-2 S/S in Vietnam. Annual production of about 1,220 GWh.

Photograph courtesy of Viet-Lao Power JSC
Posted 7 Jan 2017

Location: Xekong
Operator: Viet-Lao Power JSC
Configuration: 2 X 127.5-MW Francis
Operation: 2013
T/G supplier: VA TECH
Quick facts: In Jul 2003, a group of state-owned Vietnamese companies set-up Viet-Laos Development and Investment Co to develop Laotian hydroelectric plants per an inter-governmental MOU calling for the export of 2,000 MW of electricity to Vietnam. The group is headed by Song Da Construction Co with a 60% stake and includes EVN, Central Construction Corp, Urban and Industrial Zones Investment and Development Corp, and Transportation Works Construction Corp 5 and 8. The lead project is the Xekaman-3 plant in Dakcheung district, about 35km from the Vietnamese frontier. Xekaman-3 has a 128m high, 430m long RCC dam on the Nam-Paog-O tributary of the Xekong River. The total cost estimate was $273mn of which $203.8mn is borrowed from Vietnam's Development Assistance Fund and commercial banks. Vietnam's Ministry of Finance is guarantor of the lending packages. In Mar 2005, Vietnam Bank for Investment and Development agreed to lend $31.7mn for this and other Vietnamese hydro projects in Laos and construction got underway in Apr 2006. A new 86km, 220kV transmission line will connect to the EVN grid in Quang Nam province. The project completed in Jul 2013.

Photograph courtesy of Nippa Tech Co Ltd
Posted 17 Oct 2013

Location: Champasak
Operator: SV Group Co Ltd
Configuration: 2 X 6.55 MW
Operation: 2017
T/G supplier: ??
EPC: Yunnan Hydroelectric Construction Co Ltd
Quick facts: This SHP is one of two promoted by developer SV Group Co Ltd in JV with B Grimm Group near Pakse City. The project includes a fixed weir, a sand flush, intake, headrace channel, head tank, penstock, powerhouse, and a tailrace. The partner project is Xenammou-2. The construction contract for both SHPs was signed in Oct 2013. The project cost was approximately USD 24.9mn.

Photograph courtesy of B Grimm Group
Posted 16 Aug 2017

Location: Champasak
Operator: EDL-Gen Public Co
Configuration: 3 X 850-kW spiral,1 X 3.5-MW Kaplan
Operation: 1970-1994
T/G supplier: Bouvier, Tianjin
EPC: SOGREAH, Tata Consulting Engineers
Quick facts: This SHP is 35km north of Pakse city and is considered the first utility HPP in the country. Phase-1 construction started in 1966 and completed in 1970 (3 units) and Phase-2 construction started in 1990 and completed in 1994 (1 unit). Average prdocution is 25 GWh/yr. The project has a 2.3m tall, 435m long dam.

Photograph courtesy of EDL-Gen Public Co
Posted 12 Feb 2014

Location: Salavanh
Operator: EDL-Gen Public Co
Configuration: 2 X 3 MW, 3 X 13 MW
Operation: 1991
T/G supplier: Kvaerner, ABB
EPC: Vianini Lavor
Quick facts: Xeset-1 was financed by an ADB loan and grants from UNDP, the Swedish government and the Norwegian Government .The run-of-river scheme utilizing about 1.5 km of the river with a drop of 157 m. The intake pond is created by a 10m high gravity dam. All works were carried out in one stage and completed in 1991 after two and a half years of construction.

Photograph courtesy of EDL-Gen Public Co
Posted 12 Feb 2014

Location: Salavanh
Operator: EDL-Gen Public Co
Configuration: 2 X 38 MW Francis
Operation: 2009
T/G supplier: Dongfang
EPC: Northwest Hydro Consulting Engineers, Norinco International, Sinohydro, Aecom
Quick facts: In Mar 2004, financial agreements were signed between Laos and China for Xeset-2 , mostly financed by a $135mn, low-interest Bank of China loan. This was the largest-ever financial agreement between the two countries to that date. The site is upstream of the existing Xeset-1 plant and was built as an export project with some output to be directed to the Southern Grid. The design has a small headpond on the upper Xeset River at Ban Setkhot with a headrace canal and a surface powerhous. The first feasibility study for the plant was done in 1999 and the HPP went online in Sep 2009.

Photograph courtesy of EDL-Gen Public Co
Posted 13 Feb 2014


Data: industcards, S&P Global Market Intelligence World Electric Power Plants Data Base

Updated 16-Aug-2017