Powerline, 420 kV, Mongstad – Kollsnes, Norway

EFLA was responsible for the mechanical and electromechanical design of new 420 kV powerline. The project involved preparation of tender documents, assistance in purchasing and technical support during the construction phase. The project was in the west of Norway close to the town of Bergen.

About this Project





The project's objective 

The new 420 kV power line from Mongstad - Kollsnes will contribute to a secure future power supply to the Bergen area and Kollsnes. Together with the power line Mongstad - Modalen, they will secure the supply to residents, businesses and industry in and around Bergen.

Environmental issues

The client is responsible for route selection, impact assessment, building application and environmental and transport plan. This describes, among other things, base sites, drum and winch sites, construction roads, warehouses and pre-installation sites, as well as accessibility and helicopter transport of crew and material.

In the development, there should be as few interventions in the environment as possible. Material consumption for standardized masts and foundations in steel and concrete is optimized in the design process using specially developed macros at EFLA.

EFLA's role

EFLA designed all the structures, foundations, conductor selection and specification, line hardware and insulation for the project. In addition, EFLA assisted BKK with the preparation of tender documents, control of FAT (factory acceptance tests) for the production of steel towers, conductors and hardware and provided technical support for BKK during the construction phase.

"We at BKK are very pleased with the work that EFLA has done for us. They have designed / dimensioned the entire power line, assisted us in preparing tender documents, provided advice during the construction period and participated in factory acceptance tests such as the control of all materials for the power line construction.
All our questions, suggestions for changes and the like have been quickly and well answered by EFLA."
Harald Aakerholt