The purpose of this study was to increase the level of knowledge in the field of Environmental Impact Assessment (EIA) for wind power. The study includes six wind power farms in the County of Västerbotten in northern Sweden. The main questions were: What are the real dimensions of roadways and land claims for both roads and wind power turbines? How do those dimensions correlate with the dimensions stated in the EIA? Are there any differences in values of the dimensions between the wind power farms that are included in this study? The width of the roadways and the land claims for both roads and wind turbines in wind power farms were examined on site. The results from the examinations were compared with the dimensions available in the EIA for each wind power farm. When comparison was possible the outcome was that the measurements for roadways matched with the dimensions but measurements for land claims for roads and wind turbines exceeded the dimensions. The values of the measured dimensions vary within and in certain cases between the wind power farms. From the findings of this study it can be concluded that it is difficult to in advance estimate how much land roads and wind turbines in wind farms will claim. In addition the study shows that it is of great importance to specify the dimensions of roadways and land claims for roads and wind turbines in the EIA for wind power farms.