Veidekke has signed the EUR57.22 million (SEK600 million) contract with Stockholm Vatten och Avfall AB for the construction of the New Ostberga Tunnel (NÖT) from the Sickla facility at Hammarbybacken to Saltsjon at Finnboda, part of the project that includes Stockholm's future wastewater treatment system. The project consists of two main parts. In the first part, Veidekke will build a 2.2 m long mountain tunnel for surface water and two associated working tunnels of approx. 250 m each. The mountain tunnel will then be furnished with cast concrete floor as well as pipe installations and steel hatches to regulate the water flow. In the second part, an existing control chamber will be renovated and upgraded and approx. 300 m of new sea pipeline will be lowered and mounted on piles on the seabed. The new tunnel is scheduled to be used in 2026.
