The 0.522MW Mariveles Hydroelectric Power Plant Project is anticipated to contribute towards a more stable power supply to the freeport area in the Municipality of Bataan. The Project is located in Barangay Maligaya, Municipality of Mariveles in the province of Bataan. The project will be connected by a 3.4km long Transmission Line to a sub-station located in Alas-Asin Mariveles. The hydropower plant aims to utilize the available water from an existing reservoir in the Freeport Area of Bataan (FAB) without interfering with the existing FAB’s water treatment plant and water supply operation. The layout of the plant was studied in terms of penstock alignment, location of power house and water transfer with the highest consideration of the operation of the existing FAB water treatment plant.