NREL Installs New 1.5 Wind Turbine Near Boulder, Colorado

A Public Relations employee watches the progress of a new wind turbine installation at the National Renewable Energy Laboratory's (NREL) National Wind Technology Center near Boulder, Colorado on August 21, 2009. The nacelle pictured in the background weighs over 50 tons and will house the turbine atop a 262.5 foot steel tower. UPI/Gary C. Caskey