ScottishPower has announced a 15-year power purchase agreement (PPA) for the entire output of an Aberdeenshire windfarm owned by Englefield Renewable Energy Fund. The deal, on a discount to market basis, includes the purchase of environmental benefits from the 12MW wind farm at Dummuies in Huntly. The windfarm, currently under construction, is expected to be operational by the end of February 2007. Initial development work was completed by Eco2 Ltd.