Alaoa Multipurpose Dam Project

About this project

The multipurpose dam is intended to increase flood protection, supply seasonal water, and provide additional hydropower. The primary objective of this proposed project is to enhance resilience to increasingly intense cyclones by mitigating Apia City flooding associated with extreme rainfall events on the upstream catchment of the eastern and eastern-central branches of the Vaisigano River. The secondary objective is to improve the stability of the water supply during dry periods and reduce the turbidity of raw water taken into Apia's main water treatment plant during flood periods. The tertiary objective is to install a hydropower capacity of 0.60 MW, generating 2.12 GWh of clean electricity. The project will support the government's 70% renewable energy target for electricity generation by 2031. The project will enhance non-physical flood management systems and capacity and the biodiversity conservation and management capacity associated with the proposed dam development.

Published by

Asian Development Bank · Multilateral

Countries

Samoa

Sectors

Agricultural land resourcesDisaster Risk ReductionBasic drinking water supplyEnergy conservation and demand-side efficiencyHydro-electric power plants

Places

Samoa

Implemented by

Ministry of Finance

Accountable

Asian Development Bank

Published by Asian Development Bank to the International Aid Transparency Initiative (IATI), last updated 29 Sept 2026 and imported automatically. IATI identifier: XM-DAC-46004-52111-001-GRNT0947.

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