==Background==
In 1996, Thai Lao Power Co. Ltd. (TLL) initiated the proposed development at HongSa District, Laos PDR. The project is to be comprised of a coal mine, power plant and transmission line.
It is reported that the project comprises of a large open pit lignite mine which will supply fuel for a power plant consisting of three (3) 626 MW (gross) generating units. Water supply for the power plant will be from 2 reservoirs on Nam Louak (upstream of Muang Hongsa) and Nam Kene (downstream of Muang Hongsa). A double circuit 500 kV transmission line will also be constructed.<ref>[http://library.utcc.ac.th/onlinethesis/onlinethesis/M0195590.pdf "The Potential Impacts of Lignite Mining on the Environment and Local Livelihoods in Hongsa District, Sayabouli Province, Lao PDR."]</ref>