Norway – Construction work – New raw water supply - Birkelandsvatn. Contract E71 Outdoor and Tunnel

ABOUT THE PROJECT IVAR shall establish birkelandsvatnet in Bjerkreim municipality as the new raw water source for its water supply. The project mainly includes the following: • intake of 70 m deep in Birkelandsvatnet • intake tunnel to an intake station • intake station with technical installations • raw water tunnel that is connected to the existing raw water tunnel. • access road • portal building • access tunnel • site tunnel Matter from blasting tunnels shall be deposited locally in the area. GENERAL INFORMATION ABOUT THE DELIVERY The works in contract E71Utomhus and tunnels mainly include the following: • Establishment of a construction road at the start and permanent access road to the end. • Necessary landslide protection • Driving and securing tunnels • Establishment and completion of landfills. • Culvert/bridge for crossing Stølsåna and Kyrkjebekken • Water and sewage pipelines in the access tunnel, bottom pipelines in the intake station and portal building, as well as installations for treatment of grey water • Laying of high voltage cables in accordance with instructions from Enida • Concrete plugs on each end of the intake station, including waterproof driving port in concrete stoppers against raw water tunnel • Concrete cover in access tunnel and raw water tunnel • Temporary concrete wall in niche at the downstream end of the raw water tunnel • Conduit for fibre cable in raw water tunnel.