^Philip Hirsch, Carol Warren - 2002The Politics of Environment in Southeast Asia Page 59 "Three other dams also contribute to the grid, two of which were completed during the 1960s (Thac Ba in the north, now almost defunct, and Da Nhim in the south), while the more recently built 440 MW TriAn Dam, north of Ho Chi Minh City, is supposed to be a major source of power for the increasingly energy-deficient south. "
^Journal of Geology: Series B. 2000- Issues 15-20 - Page 79 "The Thác Bà lake was built in early 70th decade to serve the hydroelectricity and water regulation. After 28 years of operation this lake has become gradually shallow. In the past, during the first years of its existence, it retained a quantity of clay sediment like Hòa Bình lake does at present. Nowadays, it cannot retain clay sediment because the water depth is smaller and smaller."
