...8) Buildings in the middle of nowhere usually have a powerline going up to them.
9) Be wary of small shallow canyons (50-100 ft deep). Often powerlines will span these canyons.
10) Powerlines are often...
...has many times before been suggested don't fly where you can't land, if the big fan behind you quits! don't fly up the center of box canyons, close to mountains or over w...