The Hàm Thuận – Đa Mi Hydroelectric Power Complex is a cascade of two
hydroelectric
Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energ ...
Vietnam
Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...
. It is operated by Da Nhim – Ham Thuan – Da Mi Hydropower Joint Stock Co., a subsidiary of
Vietnam Electricity
Vietnam Electricity (EVN; ) is the national and the sole public power company in Vietnam. It was established by the government of Vietnam as a state-owned company in 1994, and has operated officially as a one-member limited liability company s ...
. The same company also operates the older
Đa Nhim Hydroelectric Power Station
The Đa Nhim Hydroelectric Power Station is a power station on the Đa Nhim River in Vietnam. Phase 1 construction started in April 1961 and was finished in January 1964. It has installed capacity of 160 MW.
Đa Nhim Lake is at an altitude ...
.
History
A feasibility study of the project was conducted by the Vietnamese government in 1991. Construction began in 1997 and both stations were opened in 2001. The main contractors of the project were Tomen Corporation,
Ansaldo Energia
Ansaldo Energia S.p.A. is an Italian power engineering company based in Genoa, Italy. The original parent company, Gio. Ansaldo & C., was founded in 1853, and merged with Finmeccanica in 1993 (now Leonardo S.p.A.).
In 2024, the company's sha ...
,
Fuji Electric
, operating under the brand name FE, is a Japanese electrical equipment company, manufacturing pressure transmitters, flowmeters, gas analyzers, controllers, inverters, pumps, generators, ICs, motors, and power equipment.
History
Fuji Electric ...
,
Hitachi Zosen Corporation
, formerly , is a major Japanese industrial and engineering corporation. It produces waste treatment plants, industrial plants, precision machinery, industrial machinery, steel mill process equipment, steel structures, construction machinery, ...
Maeda Corporation
is a Japanese corporation which was established in 1919. Its main areas of business are building construction and civil engineering.
Maeda has domestic offices in eleven Japanese cities, and overseas offices in Thailand, Hong Kong, and India.
...
,
Kumagai Gumi
is a Japanese construction company founded in Fukui, Fukui Prefecture, Japan. The company still has registered headquarters in Fukui, but the actual head office is located in Shinjuku, Tokyo.
History
Santaro Kumagai, the company's founder, be ...
,
Astaldi
Astaldi S.p.A. is an Italian multinational major construction company based in Rome. The group is active in the fields of civil engineering, hydraulic engineering, electromechanical engineering and transportation.
Significant subsidiaries incl ...
, Kukdong Engineering & Construction Co Ltd., and
Nissho Iwai Corporation
is a ''sogo shosha'' (general trading company) based in Tokyo, Japan. It is engaged in a wide range of businesses globally, including buying, selling, importing, and exporting goods, manufacturing and selling products, providing services, and pl ...
. Consulting services were provided by
Electric Power Development Company
The , operating under the brand name J-POWER, formerly , is an electric utility in Japan. It mainly produces electricity from coal and hydroelectric power stations. It also has a few wind farms and is currently building a nuclear plant in Ohma, ...
and
Nippon Koei
ID&E Holdings (formerly Nippon Koei Co., Ltd. (日本工営株式会社)) is a Japanese engineering consulting company, founded on 7 June 7, 1946, and headquartered in Chiyoda, Tokyo, Japan. It is the oldest independent consulting firm in Japan. ...
. The project cost ¥70.145 million, of which 59.623 million was borrowed from the
Japan Bank for International Cooperation
The , JBIC, is a Japanese public financial institution and export credit agency that was created on October 1, 1999, through the merger of the Japan Export-Import Bank (JEXIM) and the Overseas Economic Cooperation Fund (OECF).
JBIC became the ...
.
Hàm Thuận
The Hàm Thuận dams are located on the
La Ngà River
The La Ngà River () is a river of southern Vietnam. It originates in Lâm Đồng Province and flows through Bình Thuận Province and Đồng Nai Province for . The river has a catchment area of .Bách khoa Toàn thư Việt Nam It is a major ...
and consist of one main dam and four auxiliary dams. The main dam is a rockfill, center impervious core type of
dam
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aqua ...
. Its height is and length is . Auxiliary dams are of the earthfill homogeneous type. The Hàm Thuận dams create the Hàm Thuận reservoir with a surface area of and active capacity of . The maximum capacity is . The main dam is located at and the power station is located at .
The Hàm Thuận power station has an
installed capacity
Nameplate capacity, also known as the rated capacity, nominal capacity, installed capacity, maximum effect or gross capacity,Đa Nhim – Hàm Thuận – Đa Mi Joint Stock Power Company Từ ngày 19/01/2012 đến 16/02/2012 đội sửa chữa của TTDVKT thuộc Công ty Cổ phần Thủy điện Đa Nhim – Hàm Thuận – Đa Mi đã tiến hành xử lý sự cố độ rung, độ đảo tăng cao của tổ máy số 2 Nhà máy Thủy điện Bảo Lộc" It consists of two units with a capacity of 150 MW each.
Đa Mi
The Đa Mi Dam impounds the La Nga River approximately 2 km south of the Đa Mi lake. The main dam is a high rockfill dam and it creates the Đa Mi Reservoir with a maximum capacity of . The reservoir is daily regulated from the Hàm Thuận Reservoir, approximately 6 km further North-East. The main dam is located at .
The Đa Mi power station is located downstream from Hàm Thuận station at . The power station has an installed capacity of 175 MW, consisting of two units each with a capacity of 87.5 MW.
The complex also provides water to the Trị An Hydroelectric Power Station downstream of the Đa Mi power station along the La Nga River: near to where it originally joined the
Đồng Nai river
The Đồng Nai River ( ) is a river in Vietnam that originates in the Central Highlands region of the southern portion of the country. It is approximately 586 km in length, making it the longest river to be entirely located in Vietnam. It g ...