Morrison Hershfield has been successful in its international bid for the Kality Wastewater Collection and Treatment Expansion Project in Addis Ababa, Ethiopia.  The Morrison Hershfield team was selected from six international consultants shortlisted for this World Bank funded project.

The Addis Ababa Water and Sewerage Authority (AAWSA) retained Morrison Hershfield to provide a new innovative treatment technology for a city with a growing need for these resources.  AAWSA’s vision in part is to “see Addis Ababa having a modern wastewater disposal system that befits its status as Africa’s metropolis.” 

The project will result in an improved level of quality and increased capacity of the City’s treatment and sewage collection system.  The large, aging and land intensive wastewater lagoons will be replaced with a new state-of-the-art wastewater treatment plant.

Morrison Hershfield has partnered with the Ethiopian engineering firm ARMA.  ARMA will provide local engineering and technical support.  Wastewater engineers from Morrison Hershfield’s Infrastructure Division Water & Wastewater Group will work in Addis Ababa throughout the design and construction phases of this project.

The City of Addis Ababa is divided into three sewer catchment areas, Kality, Eastern and Akaki. The current project is the larger Kality catchment where the estimated population is over 2.3 million people. The sewer system serving the Kality catchment has an approximate total length of trunk, secondary and laterals sewers of approximately 30 and 90 km respectively, much of it in a state of disrepair.

Morrison Hershfield’s assignment will be to provide engineering services to replace the aging lagoons with a mechanical plant sufficiently sized to meet the demands of a rapidly growing city.  More specifically, Morrison Hershfield will provide:

• The preliminary and detailed design as well as construction administration and commissioning services for the new mechanical treatment plant
• The engineering services for new secondary lines and laterals to expand the area within the Kality catchment serviced with piped sewers
• The engineering services for the rehabilitation of the existing sewers where needed and the replacement of the siphons in the system.

Dwayne Johnston, P.Eng., Vice President, Infrastructure Division, notes “This is a very exciting opportunity for Morrison Hershfield and demonstrates our significant wastewater design capabilities both at home and internationally.  We are pleased to have a role in ensuring adequate and safe sanitation facilities for the people of Addis Ababa."

Satellite View of Existing Kality Lagoon

For further information contact Dwayne Johnston, Vice President, Infrastructure Division, Morrison Hershfield Limited at 403-246-4500.