Wind has come a long way since the 1980s in terms of the power industry and wind power. It’s hard to believe that many of the wind turbines we put into action in 1982 were able to generate only about 100 kilowatts of energy, maybe enough to power about 36 homes when the wind was blowing at our first wind farm at Altamont Pass. Soon we will have giant turbines that can put out almost 2 megawatts (MW) of power each, enough to power 730 homes, and they’re more efficient (taking up less space for more power).
Plus they are a clean, green source of electricity.
The Altamont Pass location has changed in recent years. Towers now can be 100 feet or more in height, utilizing wind that is stronger and more consistent than breezes closer to the ground. Lattice support towers that encouraged bird nesting are being replaced by towers designed without nesting opportunities and bird collisions have been significantly reduced as modern turbine blades over 100 feet in diameter turn slower than those on older windmills.
The U.S. Department of Energy says that most windmills in the country are started when wind speeds are between 8 and 16 miles per hour and turned off when winds exceed 55 mph. Higher winds can damage the windmills, so operators remotely stop them from spinning.
Today we can generate almost 200 MW from wind for local distribution, using turbines at Altamont as well as power from wind farms in Washington and Southern California (see our energy resources map). Combining that wind energy with the electricity generated by solar, hydroelectric, geothermal and landfill gas resources, we’re able to keep our power generation for our Santa Clara customers over 40 percent carbon free.