400 feet up ?
big ones can be even taller
http://www.macalester.edu/maccares/Images/Turbine%20Scale%20-%20Windustry.jpg
http://www.gepower.com/prod_serv/products/wind_turbines/en/index.htm
It’s in the linked blog.
“Many modern turbines are 400 feet tall and carry 130-foot-long, 7-ton blades”
They are building them all over eastern Oregon where I live also.