His Majesty the King granted a royal initiative on 25 November 1992 to consider constructing a reservoir at upper Lampayang Basin along with a water regulating tower.
Later on 16 November 1995, His Majesty the King granted another initiative to expand the water delivery system and consider the possibility of digging a pond fixed for each plot for storing water which is transferred through such system, as specified by the New Theory practice. He also raised the possibility of diverting water from Huai Pai Reservoir, which is close to Mukdahan Province, to replenish Lampayang Reservoir in order to expand the areas under irrigation.
The Upper Lampayang Reservoir was constructed and the earth dyke around the office site was built together with a pertinent structure and an irrigation system. The earth dam has a height of 16 meters, a length of 725 meters, a width of 8 meters, and a storage capacity of 4.4 million cubic meters.
The reservoir is capable of storing 4 million cubic meters of water, and equipped with a water delivery system of 14,720 kilometers long. The water diversion structure is also built at Huai Pai Reservoir, equipped with a 35,950 kilometer long water delivery pipeline to transfer water from the reservoir to support about 1,600 hectares (10,000 rai) of cropland, covering 5 villages and benefiting 579 households.