Drinkwater

Winneba Water works – replacement and augmentation

History of the system

The existing Winneba Water Supply System is a Conventional Drinking Water Treatment Plant. This plant consists of a raw water intake in the river Ayensu, a raw water pumping stage and two Conventional Treatment Streams.

 

The system’s existing capacity is approximately 1,000,000 gallons a year. It was built in 1921 with a designed capacity of 135 m3/day for a population of 8400 people. In 1943 the capacity of the plant was increased again to 900 m3/day. This new plant was constructed in the year 2000 and 2001.

 

Scope of works under proposed rehabilitation

The existing system has been replaced and expanded to 3,000,000 gallons a year with a concessional loan of 35% from the Netherlands Government.

 

The Project was completed over a period of 30 months.

 

Details of works include the following

* The existing dam in the Ayensu river will be replaced with a bigger dam to obtain an increased buffer storage of raw water.
* A new raw water pumping station will be constructed and a new raw water transmission pipeline will be installed over a distance of 3 km and an elevation to the treatment plant of 70m.
* A new treatment plant will be constructed up hill including a clear water reservoir.
* The existing distribution network will be refurbished and extended under the project to enable communities around Winneba to benefit from quality portable water.

 

Client
Project
Capacity
Year of completion
Consultant
Ghana Water Company Limited
Design and Build
4,400,000 m3/year
2002
Witteveen & Bos