Attending the ceremony were Mr. Trinh Dinh Dung - Member of the Central Party Committee, Deputy Prime Minister; the leaders of the Party, the National Assembly, the Government and Vietnam Fatherland Front, the relevant ministries and representatives of the Provincial People’s Committees, Authorities of Son La, Dien Bien, Lai Chau provinces; the media agencies; Vietnam Electricity (the investor), Son La Hydropower Plant PMU (representative of the investor), the EPC Contractor, Contractor’s members, designers, supervision consultants, suppliers, etc.
Lai Chau hydropower projects with a total investment of VND 35,700 billion is a special- grade project and the third largest hydropower project on the Da River, connected with the Son La and Hoa Binh hydropower plants. The main task of the project is to supply power to the national electricity system with average annual power output of about 4.7 billion kWh; prevent flood in the rainy season, supply water in the dry season for Northern Delta and contribute to socio-economic development of the Northwest region.
The volume of the roller compacted concrete dam of Lai Chau hydropower is 1,886,000m3; the maximum height is 137m, dam construction speed by the height is 20m/month in average, and 27.9m /month at the highest speed. This is one of the dams gaining the world’s fastest construction speed. The compacted concrete construction finished ahead of schedule has facilitated the early construction of other works items; the water was soon stored in the reservoirs, bringing benefit of generation for Lai Chau, Son La and Hoa Binh hydropower plants.
Lai Chau hydropower project is also recognized as the remarkable growth of personnel, engineers, electrical workers, the Vietnam Machinery Erection Industry. This is a nation-level multi-purposed hydropower plant that the engineers and workers in Vietnam themselves conducted all the planning, designing, construction and installation, device synchronization, monitoring, management and operating work for the plant.
To achieve the completion of the project 01 year ahead of the schedule as agreed in the Resolution of the National Assembly, thanks should be paid to the strict direction of the State Steering Committee, the efficient coordination among ministries, sectors and localities in the arrangement of investment capital during the early stages and the site clearance for construction. During the construction process, the construction units have encountered many difficulties due to several reasons: the construction works are located in remote, rural areas, unfavourable conditions of transportation infrastructure, geological nature, etc. However, by the solidarity and the promotion of technical innovations, production optimization, enhancing the maximum potential scientific and technical mastery, with best efforts made by all the staff and workers on the construction site, the investor and contractors strived to overcome all obstacles to build up a modern industrial project right inside the northwest mountainous area. The success of this project is thanks to strict directions and spirit of diligence, creative minds, and the power of the human intellect of Vietnamese people.
The fact that the project completed 01 year ahead of the schedule as agreed in the Resolution of the National Assembly meant earlier power supply for the national grid of about 4.7 billion kWh, an important contribution to ensuring national energy security, boosting economic and social development of Lai Chau province in particular and the national economy in general. Besides the benefits of increasing annual revenue for Lai Chau province, the Lai Chau hydropower project also incorporated meaningful arrangement and formulation of residential areas, especially the resettlement areas under infrastructure standards for new rural areas, construction of system of bridges, roads. All these factors play an important role in promoting socio-economic development of Lai Chau province and the Northwest region.
- The main contractors engaged in the project:
Project’s construction component was performed by a combination of contractors led by Song Da Corporation, consisting of Song Da Corporation; Vietnam Machinery Erection Corporation; Infrastructure Construction and Development Corporation and Truong Son Construction Corporation. The project implementation was supervised by Son La PMB with assistance of Fichtner (Germany); installation supervision was done by Son La Hydropower Company.
Main items of equipment for the plant was supplied by: Electromechanical equipment by the Consortium of HZN / ALSTOM; 500kV transformer by TBEA; 500 kV GIS by NHVS; The hydro-mechanical equipment are mainly made by domestic contractors (intake gate by Consortium of MIE, AGRIMECO, NARIME; penstock by the Consortium of CEMC and PEC, cranes by Consortium of Hong Nam Mechanical Joint Stock Company and Quang Trung Mechanical Enterprise ).
- The project milestones:
+ Commencement: 05 November 2011;
+ River blocking – Stage 1: 24 April 2012;
+ River blocking – Stage 2: 15 October 2014;
+ Drain closure, reservoir storing: 20 June 2015;
+ Unit 1 generated: 14 December 2015;
+ Unit 2 generated: 20 June 2016;
+ Unit 3 generated: 09 November 2016.
The inauguration of Lai Chau Hydropower project is also an achievement to celebrate the 62th traditional day of the Vietnam Electricity sector (21 December 1954 – 21 December 2016).
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INFORMATION ABOUT LAI CHAU HYDROPOWER PROJECT
Lai Chau Hydropower project consists of 2 components:
+ Construction of Lai Chau hydropower plant by Vietnam Electricity as the investor (main items including: dams, spillways, energy routes, hydropower plants, transmission systems connected to the national grid), road bypass to avoid flooding Provincial highway No. 127 and road bypass to avoid flooding the Muong Te - Pac Ma section;
+ Project of resettlement for residents by the People's Committee of Lai Chau province as the investor;
Overview of the construction project:
- Investor: Vietnam Electricity, represented by the Project Management Board of Son La hydropower plant
- Main designer: Power Construction Consulting Joint Stock Company No. 1
- The main parameters and volume of hydropower project:
+ Catchment basin area: 26,000 km2
+ Reservoir capacity: 1,215 billion m3
+ Normal water level: 295 m
+ Flood control water level: 297.90 m
+ Dead water level: 265.00 m
+Installed capacity: 1,200 MW (3 x 400MW)
+ Annual power output: 4,670 billion kWh
+ Structural concrete gravity dam of 137.00 m high, dam crest length of 613.00m, the plant has 2 deep discharge compartments (BxH = 4x6) m, 6 (14.5 x 20.0 BxH =) m, discharge surface compartment (14.5 x 20.0 BxH =) m. Open-typed hydropower plant, located behind the dam.
+ Volume of earthworks: 16.780 m3 x 106 m3 + The volume of concrete of all kinds: 3.25 million m3, of which 1.36 million m3 of compacted vibrated concrete (CVC) and 1.89 million m3 of roller compacted concrete (RCC).
+ Reinforced drilling and waterproofing injection drilling: 111.370 x103 md
+ Volume of equipment: 34.00 x 103 tons of types.
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CONTACT INFOMATION:
Vietnam Electricity
Public Relations Board
Tel: 04.66946405 / 66946413
Fax: 04.66946402
Address: No. 11 Cua Bac Street, Truc Bach Ward, Ba Dinh District - Hanoi.
Website: www.evn.com.vn, www.tietkiemnangluong.vn
PMB of Son La Hydropower Plant.
Tel: 04 6694 1102, Fax: 04 35541371.
Address: No. 11 Cua Bac Street, Truc Bach Ward, Ba Dinh District - Hanoi.