Abidjan, Côte D'Ivoire, Africa

Through a strategic partnership with Gauff Engineering, Dar has been commissioned to support local authorities and stakeholders in addressing long-standing challenges in stormwater drainage and sewage disposal across four key districts in Abidjan: Yopougon, Abobo, Anyama and Locodjro. Designing stormwater and sanitation infrastructure promises to improve public health and urban resilience across the Ivorian city.

Specifically, Dar, in partnership with Gauff Engineering, is delivering preliminary design and functional tender documentation for the improvement and extension of sanitation and stormwater drainage systems in Abidjan. This initiative targets long-standing infrastructure challenges in underserved areas prone to flooding, erosion, and inadequate wastewater management.

Preliminary Design and Tender Documentation

Water and Wastewater

Abidjan faces significant sanitation and stormwater management issues, particularly in districts where natural drainage systems and limited infrastructure expose communities to regular flooding and health risks. Inadequate systems in Yopougon, Abobo, and Locodjro have contributed to environmental degradation and community displacement, while northern areas such as Anyama lack the transmission networks required to support wastewater treatment. A coordinated design approach was needed to prepare technically sound solutions that enable future implementation and reduce these risks.

Dar’s scope of work includes the design and preparation of tender documents for four sub-projects:

• In Yopougon, approximately five kilometres of natural drainage channels will be developed into lined channels and integrated with an existing engineered system to improve water flow and offer flood protection.
• In Abobo, a new drainage network will be designed and constructed across 11 low-lying basins to manage stormwater in zones prone to flooding.
• In Locodjro, the project includes implementing an engineered drainage solution over a region of 45 hectares, to replace unsafe natural ravines that have caused erosion and community displacement.
• In Anyama, the project covers the design of a major sewage trunk line that will span 15 km of gravity and force mains and connect four northern pump stations to a wastewater treatment plant with a capacity of 123,000 m³/day – a transformative step towards environmental health and sanitation.

Together with Gauff Engineering, Dar is supporting the delivery of resilient and future-ready infrastructure that addresses urgent environmental and public health challenges. The project represents a step forward in restoring environmental balance, reducing vulnerability to flooding, and enhancing sanitation services for communities across Abidjan.