"C Kingsbury" wrote in message hlink.net...
Is it legal for a helicopter to fly under a bridge? What are the obstale
clearance limits?

I don't see why not. In some cases even airplanes can. We used to fly
the sea plane under a large mountain bridge all the time. Of course we
made sure to land and take off just short of the bridge so its for the
purpose of take off or landing. The briges was probably almost 1000
feet above the water though.
Gotta love the Sierras.
-Robert