In the area of Hemmathagama (Sri Lanka) the river Auphinella rises on top of a mountain. Now the inhabitants of 7 villages in the area still drink raw water. The construction of an intake and water treatment, connected to a newly laid out pipeline network, will change that. Clean drinking water means fewer diseases and less pressure on healthcare.
The mountainous terrain has a big advantage. Due to the differences in height, the water supply can make use of gravity for distribution. No water pumps are required. This not only makes it cheaper, but also minimises the impact on the environment.
Ballast Nedam handles the project from design up to and including the connection to 17,000 houses, including the placement of water meters. Since the 17,000 houses are spread over 7 villages, good environmental management is essential. The pipes run - partly underground, partly above ground – across the grounds of many different owners, and in every village there will be a separate water reservoir. Ballast Nedam uses a Sri Lankan environment manager for the agreements that need to be made about this in every village.
Much of the required material - such as pipes and valves - is supplied from the Netherlands. On site, an experienced Sri Lankan contractor installs the pipes and provides the connection to the houses. Ballast Nedam has its own 10-person project management team, with an office in Colombo at the client's location, about a 3-hour drive from the project site. The last three months of the project, Ballast Nedam will be training the Sri Lankan team that will be responsible for the maintenance and operation of the water treatment plant.
Hemmathagama, Sri Lanka
Project Phase: In progress
Construction Time: 2017 - 2021
Characteristics: Design & Build of water treatment and distribution network with capacity of 22,000 m3 / day, 111 km of tubes, 7 reservoirs (max. 2,750 m3)
Client: National Water Supply and Drainage Board
Partners: Sierra Construction Ltd (Sri Lanka), Balteau / CMI (Belgium)
Contract type: FIDIC Yellow