In Zeewolde one of the biggest onshore wind turbine farms with 36 wind turbines is realized. This way more than 88.000 households, which equal a city the size of Almere, are provided with electricity. A Combination Wind Foundation existing of Spie construction services and Dura Vermeer Beton- en Waterbouw BV are constructing the foundations for the wind turbines. Dyckerhoff Basal Betonmortel B.V. - regio Midden provides here the concrete for a total of 17.000 m³ , per foundation some 470m³. By the end of April 2013 all wind turbines will have to operate and so electric current will be supplied into the net.