I've seen some research that suggests PB had a limited effect on the caribou herds.Everyone that worked in and travelled through the Pinedale Anticline said the exact same thing regarding MD and pronghorn on the winter range. "Doesn't bother them, I see them all the time standing on the side of the rig roads and well pads". Hell, even I used to say that. Kevin Montieth's research showed that is does bother them. Alot!