Dam construction has been positively assessed because of a variety of its benefits such as water supply, flood control, sightseeing, and so on. Recent debate on Yeongwol and Hantan river dam constructions has called a public attention to the negative impacts of dam construction. However, most processes of gathering public opinions had a tendency to focus on related experts or general people. Incorporating the opinions of those who live around the dam to be constructed into decision-making about dam construction has not been sufficient. Therefore, this study attempts to derive the relative weights of dam construction impacts, which the dam-neighboring residents evaluate. The study area is restricted to Andong-dam, Imha-dam, and Chungju-dam where popular complaints are continuously being lodged. To this end, we apply the fuzzy set theory for decision making analysis. The fuzzy set theory can reflect more normally the uncertainty of the stakeholder's responses than other decision making analysis methods. The results show that dam-neighboring residents rank compensation for various damages from dam construction most important. This can be compared with the results from the metropolitan people and experts in water resources.