The U.S. Geological Survey has estimated that 10 to 20 million shad may travel up the Columbia River annually. While pelicans ...

TUMACÁCORI, Ariz. — The Santa Cruz River is not like most American rivers. If some of its admirers get their wish, it might also become a wildlife refuge unlike any other. Much of its 184-mile ...

The U.S. Senate has approved support for a hydropower, clean-energy project on the Salt River. The bipartisan measure, sponsored by Senators Mark Kelly and Kyrsten Sinema as well as Rep.