This single damn will but not much for now. Will however throughout the country in future based on growing power needs in Thailand. Hydroelectric power geneneration in Thailand is by far the most predominnant. 70% as I recall. Most of this coming from the Mekong river basin via damns owned and operated by Lao goverment and other ASEAN countries.
https://www.bbc.co.uk/news/world-asia-44936378