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High-energy rooftop

The new 23-story Twelve|West building in downtown Portland, Ore., has four roof-mounted, building-integrated wind turbines rising 270 feet above the street. Each 12-foot-diameter turbine has a rotation system that orients the blades to wind. The units are predicted to generate about 10,000 kilowatt-hours per year. The building’s roof also has an array of solar panels that will be used to heat water. The first floor of Twelve|West will be retail space, the next four floors will be the new home of Zimmer Gunsul Frasca Architects, and the upper floors will be apartments. The project team includes owners Gerding Edlen Development Co. LLC and Downtown Development Inc., designer ZGF Architects and general contractor Hoffman Construction Co. Photo by Dan Carter, Dolan Media Newswires

The new 23-story Twelve|West building in downtown Portland, Ore., has four roof-mounted, building-integrated wind turbines rising 270 feet above the street. Each 12-foot-diameter turbine has a rotation system that orients the blades to wind. The units are predicted to generate about 10,000 kilowatt-hours per year. The building’s roof also has an array of solar panels that will be used to heat water. The first floor of Twelve|West will be retail space, the next four floors will be the new home of Zimmer Gunsul Frasca Architects, and the upper floors will be apartments. The project team includes owners Gerding Edlen Development Co. LLC and Downtown Development Inc., designer ZGF Architects and general contractor Hoffman Construction Co. Photo by Dan Carter, Dolan Media Newswires

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