The wind farm lies between Lybster and Watten and feature 25 turbines capable of generating up to 50MW of electricity.
Work on the project commenced in late 2010 to prepare the site access roads.
The scope of work included construction of seven km of access roads and the upgrade of three bridges, to enable them to carry the weight of construction vehicles.
Phase two will include building a temporary construction compound, wind turbine foundations, a permanent met mast and more site access tracks.
E.ON construction project manager Dean Guy said the Camster site is an excellent place for a wind farm and this next stage of construction marks a significant step towards completing the project.
The wind farm is expected to be fully operational by mid 2013.
