E6 Clean Water Tunnel
Norway
2022 | ONGOING
This project involves the construction of a new water supply system for the population of Oslo, which currently gets 90% of its drinking water from Maridalsvannet Lake. Currently, any disruption to the existing supply system could have serious consequences for the entire city. The project includes a feeder tunnel to bring water from Holsfjorden Lake, 19 km from the city boundary, a groundwater treatment plant at Huseby, and a tunnel to transfer of clean water across the city. In a joint venture with AF Gruppen, Ghella is responsible for the construction of the clean
water distribution system. The network will connect to the already operational water treatment plant in Oset, reinforcing the connection between East and West Oslo. This will ensure that the city has major water reservoirs and a redundant water supply system, thus protecting the people of the Norwegian capital from the consequences of any malfunctions.
Benefits
1. Ensures clean water supply for a rapidly growing population
2. Reduces network losses and water wastage