E6 Clean Water Tunnel
New Waters for Oslo
E6 Clean Water Tunnel is part of the new water supply project for Oslo that will ensure 100% supply for the current drinking water transmission system, with about 18 km of multiple tunnelling routes dug into the rock.
Norway
2022 | ONGOING
This project involves the construction of a new water supply system for the population of Oslo, which currently gets its drinking water from Maridalsvannet Lake. At the moment, a disruption to the existing supply system could have serious consequences for the entire city. The project includes a feeder tunnel for bringing water from Holsfjorden Lake, 19 km from the city boundary, a groundwater treatment plant at Huseby, and a tunnel for the 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 will have two 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