The new Hoover Dam bypass bridge includes a wildlife overpass to help protect the state's Bighorn Sheep population. The three sheep bridges cost $4.8 million, a fraction of the price tag for the $71.3 million bypass project. Biologists determined that the sheep prefered overpasses to underpasses because of their keen eyesight and their ability to scope out terrain before approaching it. More from the AZ Republic...
A Bighorn Sheep Crosses the New Hoover Dam Bypass