The wind farm in Clifton is on track to triple its energy capacity in the upcoming years by constructing five bigger wind turbines to join the existing five. Two weeks ago, the Clifton planning board approved a pre-application plan for the 20-megawatt Silver Maple Wind Project, which will be an expansion of the 9-megawatt Pisgah Mountain wind energy project, according to meeting minutes. The expansion will be developed by Halifax, Nova Scotia-based firm SWEB, a subsidiary of Austrian developer WEB Windenergie, which operates more than 200 wind farms across the world.