Excuse the reply for possibly looking argumentative — there is no water going over the emergency spillway today. See the link just above your post for a great helicopter overflight video from today.
Yeah, that’s a good thing given the progress of the erosion over the relatively short time that spillway was in use.
The major threat is alleviated and a secondary threat created: 110,000cfm of water being dumped down the Main Spillway into the Feather River is WAY more volume than normal, and it is THAT volume of water that is the real and present flooding concern.