As of midnight, the reservoir level was at 899.77 feet, and flow over the emergency spillway has stopped. If the level is above about 900 feet, the excess goes over the emergency spillway. Peak was around 902 feet. Data feed from dam sensors here: [1] Google Maps view of emergency spillway under normal conditions here: [2] Compare with drone footage from yesterday.[3] Main spillway (which has gates) is back in use.
The outflow seems to be the ~100000 cfs from the main spillway draining at full capacity, which they opened to 100% early in the evening to relieve the emergency spillway, in spite of the existing damage to the main spillway.
It's good to see the lake level coming down. 896 feet now, four feet below overflow at the emergency spillway.
Don't take the outflow rate number too seriously. The emergency spillway is just a concrete lip with no flow metering. Here's the actual data source information.[1]
Things look a bit better than a few hours ago.
[1] http://rdcfeeds.redding.com/lakelevels/oro.cfm [2] https://goo.gl/maps/mzwyXvRvZAv [3] http://www.sacbee.com/news/local/article132154774.html