ABSTRACT Hydropower is a power plant that relies on the potential and kinetic energy of water (waterfalls) to generate electricity. This study aims to examine the calculation of the production of electrical energy in the Koto Panjang 3 x 38 MW Hydroelectric Center (PLTA). The Koto Panjang hydropower plant utilizes a reservoir that dams the Kampar and Mahat rivers in West Sumatra and Riau. The …