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Diamphwe Multipurpose Dam

Our Role

SMEC completed an Independent Environmental and Social Impact Assessment (ESIA) of the Diamphwe Multipurpose Dam and associated structures, including: the conveyance main to the treatment works; water treatment works, balancing tank and pipeline to Lilongwe City; temporary construction sites; and borrow pits.

SMEC’s scope of work included:

  • An Environmental and Social Management Plan (ESMP)
  • A Environmental Monitoring Plan (EMP)
  • A Resettlement Action Plan (RAP);
  • Development of Bills of Quantities (BOQ) for environmental monitoring, mitigation and impact management.

Project Overview

Studies recommended the construction of a multipurpose dam on Diamphwe River as a new source of water for Lilongwe.

The objective of this project was to secure and improve water supply to Lilongwe City (and surrounding areas) until 2035, and support large-scale irrigation and agriculture, fish farming and livestock production.

Project works comprised the construction of:

  • A 25 m high roller-compacted concrete dam with a storage capacity of 150,000 m3
  • A 170 m spillway
  • Water supply and irrigation intakes
  • 80 km of pipeline
  • A 1,000 hectare irrigation scheme.
Technical Area:
Lilongwe Water Board

Learn More

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