Scottish generating company Hydro Electric is to close the experimental wind farm at Burgar Hill on the island of Orkney. The site houses three prototype machines. The two smaller machines -- a 250 kW WEG turbine and a 300 kW Howden turbine which is no longer operating due to a generator fault -- will be dismantled. A decision on the fate of the 3 MW WEG turbine, owned by the Department of Trade and Industry, is still awaited. It has been out of operation for over a year after its rotor developed a crack. According to David Gardner from Hydro Electric the site's usefulness as a research and development project has come to an end. "We have got to the point now when after more than ten years of operation we have to decide whether to continue or not," he says. "There is no economic justification for keeping it open." The company has no immediate plans to build any further wind energy capacity at Burgar Hill but Gardner says it remains a prime site for future generation.