General information

Lai Chau Hydropower Plant is a national key project, constructed on the highest level of Da river main stream, the upper level of Son La Hydropower Plant. The construction is commenced on January 5^th 2011, generated electricity of three units in November 2016, inaugurated in December 2016 which is 1 year earlier than the National Assembly’s target. Lai Chau Hydropower Plant has a total installed capacity of 1,200 MW, the average annual generation is 4,670.8 million kWh.

• Project: Lai Chau Hydropower Project
• Location: Nam Hang Commune, Muong Te District, Lai Chau Province, Vietnam
• Client: Vietnam Electricity (EVN).
• Main contractor: Song Da Corporation
• Construction period: 2010 - 2016

Scope of works performed by Song Da 9

Scope of works performed by Song Da 9
Total quantity performed by Song Da 9:

• Excavation: 4,283,360 m3
• Back filling: 1,915,170 m3
• Overburden stripping, mining and transportation: 8,800,000 m3
• CC: 1,900,000 m3

Including:

1. Construction of major works:

• Earthwork: Excavation and transportation for right bank fixed dam foundation;
• Earthwork: Excavation and transportation for foundation of flood discharge works and eroded hole;  
• Earthwork: Excavation and transportation for powerhouse foundation;
• Earthwork: Excavation and transportation for left bank fixed dam foundation and left bank power waterway (from sectional plane DIII-:-DIII+340, from elevation 265 downward);
• RCC works.

2. Construction of diversion works:

• Earthwork: Excavation, back filling and transportation for diversion works foundation, from sectional plane DIII-:-DIII-380;
• Back filling and take down upstream cofferdam stage 1; upstream cofferdam stage 2 and half of quantity of downstream cofferdam stage 2; cofferdam stage 3 and stage 4.

3. Construction of auxiliary works:

• Ground grading for auxiliary works: left bank workshop and parking area; water and electricity supply and specialized hydraulic works;
• Auxiliary works: left bank workshop and parking area; water and electricity supply and specialized hydraulic works;
• Site office and camp for Party B; site office for Board of Management of main contractor.
• Transportation system: NP2 road; NP8 road; NT11 road; part of NT8 road;
•  Part of technical and domestic water supply system: ground grading for technical water tank.

4. No.1B quarry:

• Excavation and transportation of overburden stripping of No.1B quarry, total quantity of 1.9 million m3;
• Rock transport from No.1B quarry to crushing plants;
• Drain ditch, install and reinforce rock gabion in construction area.