There's a reason TU jumps at opportunities to take out obsolete diversion dams in watersheds: This can be one of the most effective, bang-for-buck ways to open up "new" habitat for  trout--and improve the fishing for miles throughout the reconnected watershed. TU's Wyoming Water Project staff has been on a tear in the Snake River, taking out Spread Creek dam in 2011, which opened up 50 miles of important tributary habitat to native Snake River cutties. Now they're partnering again with Grant Teton National Park to remove a similar old barrier on the nearby Gros Ventre, which will unlock a whopping 100 miles or more of prime habitat.

"This is a once-in-a-lifetime opportunity to remove a significant barrier on the Gros Ventre River and make it easier for trout and native fish to access upstream habitat," said Cory Toye, director of TU's Wyoming Water Project. "These projects provide win-win solutions for all stakeholders."