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.