Yes Geology Tiger...one more thing i heard about the huge dams is that since we have fast current river in Nepal...they bring lots of debris with them and no matter how sophisticated dam you build the debris overpower the dam at one point. Similar to what happened to Koshi Barage.

I think what is best for us is small but multiple managable projects.

Disclaimer: I am no Hydro Electric engineer so please feel free to correct me if i am wrong.