Dredging of Waterways Puts Dwindling Delta Smelt Population at Risk of Extinction

The Delta smelt has been on the endangered species list for decades, and it's long been at the center of California's water wars. It lives in the Sacramento-San Joaquin Delta, where the state gets most of its water. Now, the smelt is close to extinction. And that's bringing attention to anything that could it, including something rarely discussed: the dredging of Delta waterways for big cargo ships.