These are dummy turbines. The actual turbines in the distance are frickin enormous 150 foot towers.
RAGBRAI is camping tonight 30 miles south of here in Clear Lake, Iowa, home of the Surf Ballroom (and sometime vacation spot for one Jackson Gabus). According to the RAGBRAI blog, the riders noted the miles of wind-farm turbines and the appropriate brutal headwinds. I noticed on the news this evening (and in my back yard) that the heat index today was 103 degrees in Clear Lake. There will be rock 'n roll and some beer consumed tonight! Thankfully it was a relatively short, flat stage, so deaths were kept to a minimum. ;-)