The project area, including Udon South Mine, covers five sub-districts including Non Sung, Nong Phai, and Nong Khon Kwang of Mueang Udon Thani District together with Huai Sam Phat and Na Muang Sub-districts of Prachaksinlapakhom District.
[1] Northeast Thailand is believed to contain the world's third-largest—after Canada and Russia—unexploited potash reserves.
[3] Udon North and South represent one of the largest potash reserves in Thailand, having estimated reserves of 665 million tonnes of ore grading 16 percent potassium chloride extracted from sylvite ore.[4] With a construction budget of more than 30 billion baht, the project is slated to have a maximum capacity of two million tonnes of potash a year.
[5] As of July 2015[update] mining had not begun at at least some sites due to local opposition.
[5] Concerns include questions about the disposal of mine tailings, a waste rock by-product and projected land subsidance.