Skanska is building Mullberg Wind Farm in cooperation with Jämtkraft. Mullberg, located near the town of Rätan in Sweden’s Berg Municipality, will be one of the largest wind farms in the Jämtland region. The wind farm is expected to produce approximately 247,000,000 kilowatt-hours annually.
The project is a true collaboration – from financing to construction and operation. Jämtkraft has extensive experience when it comes to electricity production, electricity trading and electricity networks, while Skanska has contributed expertise in construction and project engineering.
Preliminary study conducted in 2009
The plans to build a wind farm in Mullberget have been in the works for a number of years. Back in 2009, Svenska Vindbolaget conducted a preliminary study for a wind farm in the area. A permit application was submitted in 2010 and approved in 2011.
In September 2012, Skanska Infrastructure Development and Jämtkraft acquired Mullbergs Vind AB and the real work could begin.
The worksite is located near the E45 motorway, which serves as a convenient transport route for equipment and deliveries. Once off the E45, however, we were forced to reinforce old roads and build new roads leading to Mullberget. In conjunction with the beginning of roadwork, we also connected the worksite to the nearest power plant to ensure a connection to the national electricity grid. Clearing of the worksite began in the autumn of 2012.
Smart foundation work reduces carbon emissions
Work on the foundations for the 26 wind turbines began in November. In order to reduce the amount of concrete and reinforcements needed, the foundation was cast in an annular form, which was later filled with gravel. This enabled us to use less concrete and thus reduce the total level of carbon emissions by a full 30 percent.
Thanks to a mild winter with very little snow, we were able to continue working during the winter months of 2012 and successfully completed the necessary electrical work and laying of cables.
The 26 foundations were completed in the summer of 2013 and Siemens, which is responsible for the wind turbines, was able to start raising the towers.
Vision – zero worksite accidents
Safety is always a top priority in our projects and the work on Mullberg Wind Farm is no exception. From the very beginning of the project, the issue was emphasized in our contacts with employees in order to make everyone aware of the risks associated with constructing a wind farm. Our vision during the project was zero worksite accidents.
Mullberg Wind Farm is expected to be completed in the spring of 2014, at which point it will have the capacity to supply 50,000 households with green electricity for the coming 25 years.