The khwae noi dam project in Dan due to the initiative. The main goal to solve the flooding problem. Especially in the area of the province and neighboring provinces, including Water supplement with plantations of Chao Phraya River project. As the water use in agriculture, consumption also has created a diversion dam, dragon man. To help raise the water in irrigation canal 4 District of Phitsanulok Province, wat BOT District, Phrom phiram district and district, Wang thong district.