What does the Antiquities Act have to do with steelhead?

In Alaska, California, Idaho, Oregon, Washington by Nick Chambers

A seemingly innocuous little law passed in 1906 has become highly controversial in recent years. The Antiquities Act, signed into law by President Theodore Roosevelt, was a response to an escalating problem of looting of archeological and geologic resources and empowers the president to designate to significant historic, cultural, and scientific features as national monuments.   The Antiquities Act has …