"Mandatory measures contained in previous Yuba River biological opinions, such as requiring the Corps to place spawning gravel and woody material in the river to provide safe havens for juvenile fish, are now voluntary."
Say what?! They are adding pollutants to the water? Gravels and "woody material" into the Yuba that wasn't there to begin with? Pans, sluices and especially dredges don't add anything to the river that wasn't already in it and it's called toxic waste practically, but they are adding stuff from who knows where in the name of the salmon so it's totally ok. pshhh.