Brazzaville, the capital city of the Congo Republic registered in 2007 a population of approx. 1,400,000 inhabitants. The town is currently supplied with water produced by two water treatment plants:

• The Djoué water plant, built in 1954, located at the south of Brazzaville,
• The Djiri water plant, built in 1986 at the north of Brazzaville

The total production capacity of these two water treatment plants does not cover the current demand of potable water for the town. Also, the water supply network does not cover all town districts, especially not the outlying ones. In order to improve the situation, investment measures of 299.5 Mio USD in rehabilitating and extending the water production and distribution have been carried out.

Services Provided

Construction Supervision of 3 Works Contracts, which includes

• Overall Contracts Management
• Monitoring of progress of works and ensuring compliance with the Technical Specifications and Employer’s requirements
• Monitoring project cash flow
• Inspection and approval of Contractors’ drawings, methods, materials and work programme
• Review and approval of Contractors’ payment certificates
• Treatment of variation orders and claims
• Inspect tests for materials and structures
• Review and approval of Contractors’ certificates, Quality Control Plans, Health and Safety Plans and Environmental Mitigation Plants
• Assistance to the commissioning of all civil works and equipment and assistance in issue of taking-over certificates
• Organisation of Site Meetings, Monthly Meetings and Steering Committee Meetings
• Contracts Reporting
• Preparation of Construction Supervision Manual

Facts and Figures

Construction of the new water treatment plant Djiri 2 (5.250 m³/h), including:

• A new raw water intake common to plants Djiri1 and Djiri 2
• Ductile iron pressure pipes
• The complete water treatment process
• 2 large treated water tanks
• A treated water pumping station
• A reagent warehouse common to both water plants Djiri 1 and Djiri 2, limewater saturators, chlorine building
• Two transformer station & an electric substation and electricity distribution system
• A control and supervision system & television monitoring system
• Outdoor facilities, sewerage network, site office, on-site accommodation for the staff

Rehabilitation of the Djiri 1 water treatment plant with a capacity of 2,250 m³/h, including:

• Civil engineering rehabilitation works of the whole treatment plant
• Replacement of all equipment
• Rehabilitation of 16 existing accommodations for the operating staff

Distribution network :

• Rehabilitation of a large reservoir and a water tower
• Construction of new reservoirs
• Construction of water pumping stations
• Electrical supply for the water pumping stations
• Installation of 183 km water transfer pipes and primary network
• Remote control system between all water pumping stations, reservoirs and Djiri water plant control room