Expansion and Modernisation of Water System in Kumasi

Working smartly when money and water are in short supply. Kumasi is the second biggest city in Ghana. Here we modernised the outdated water installation and the entire water transport system. As a result, 1.8 million people spread over thirty different towns and villages can once again be sure that they will have a sufficient amount of clean drinking water. Our partnerships at a local level have also given a sustained boost to the local economy.

Industrial Construction

Project Status:



2007 - 2009


Ghana ,Kumasi

It is not only water that is in short supply in Ghana, but money is too. That means all spending is carefully considered. With the help of a subsidy from the Dutch Ministry of Foreign Affairs we were able to restore and replace old installations, design and build a sludge treatment plant, install a lifting station and construct a reservoir. We also modernised the complete water transport system, laid new pipes and installed zone and water metres.

Preventing water loss

As water was scarce, we developed and built a sludge treatment plant to thicken, work and press sludge into clay blocks for housebuilding. Instead of flowing away and being lost, following purification the backwash water was used for distribution. We also prevented the loss of treated/purified water by repairing the old water transport system, from which many litres of water were leaking. We inspected and improved around 700 kilometres of pipeline and also laid 80 kilometres of new pipes.

Lasting value

During this project we worked together with local people. The knowledge we shared and the experience they acquired will be of lasting value for the region. We also gave an additional boost to the economy over a three year period thanks to the wages paid to the 300 trained and untrained local workers. Ensuring a sufficient supply of clean drinking water also reduces sickness, resulting in higher productivity.


  • Client: Ghana Water Company Limited
  • Partners: Royal Haskoning DHV
  • Contract form: Design and Construct in accordance with FIDIC – Yellow
  • Contract value: €47,927,000