Plans by energy giant Centrica to build a new base for its North Sea offshore wind farms are expected to bring more than 100 jobs.
The Grimsby docks site will be used for workers involved in operating and maintaining wind turbines off the Lincolnshire coast.
North East Lincolnshire Council said it would provide "long-term sustainable and well-paid jobs for the area".
The facility will be completed by the end of the year.
It will serve the existing Lynn and Inner Dowsing wind farm, which was completed in 2009 and the Lincolnshire wind farm, which is expected to generate power by the end of 2012.
Centrica runs already operation and maintenance for the wind farm projects out of the dock but the new base will provide more specialist services.
Mick Turner, from Centrica Renewable Energy, said: "Grimsby provides excellent infrastructure for our operations and maintenance facility and has a strong skill base.
"The offshore wind industry is growing apace and Grimsby is well-placed to benefit from it."
