There are promising opportunities to produce clean and sustainable energy from micro, mini, small and large hydropower plants in Afghanistan. The Government of Afghanistan has planned to build several hydropower plants. One of them is Baghdara Dam Hydro-Power project in Kapisa province and is expected to produce 210 MW. In the feasibility study, two dam axis configurations were considered, one creating a small reservoir, the other creating a large reservoir. However, a recommendation comparing advantages and disadvantages was not addressed. In this paper, we compare possible Baghdara Dam axis locations and recommend one for future construction that produces optimal electric power, especially during the winter season, and provides clean potable water to New Kabul City. We have determined that dam location A (with a small reservoir) would need a long tunnel to the power station, which requires advanced technology and accurate geological surveying that is not available in Afghanistan. Axis D (with a large reservoir) will recharge downstream hydropower plants such as Kapar (120 MW), Naghlo (100 MW), Sarobi-1 (22 MW), Sarobi-2 (180 MW), and Daronta (12 MW). The large reservoir will also stop sediment ponding at the Naghlo hydropower reservoir. This case study shares an in-depth technical and practical lessons-learned with researchers, students, and practitioners.