This report compares two different dam types (Roller Compacted Concrete Dam and Concrete Face Rock-fill Dam) in order to help the decision making when choosing what dam type to build in Panama, where Vattenfall is involved in a joint venture to build a dam called Changuinola II. First a literature study was conducted to build a basic understanding regarding the two different dam types. Material for this part of the report was mostly gathered through conventional studying of books and reports, but also from conversations and lectures with senior staff members at both Chalmers University of Technology and VPC (Vattenfall Power Consultants). The case study focuses on how other dam projects have progressed and what we can learn from past experience. The dam projects studied are the construction of Changuinola I, two dams in Rio Esti and the rejected project Changuinola-75. We found that the studying of Changuinola I was of particular interest due to the fact that that project faced the same issues this report is trying to answer. Finally our findings are applied to the project of Changuinola II. We conclude that Changuinola II should be constructed as an RCCD due to facilities, such as batching plants and logistics centres, from Changuinola I still being present in the area.