emergency spillway, real close:
https://www.youtube.com/watch?v=mQkVr98xai0
Axen - there’s an old rail spur in place; can it be used?
“The tunnel is part of the Brad Freeman Trail that can be accessed from the end of Lakeland Blvd. From that trail head you can bike or walk the 3.5 miles through the tunnel and right on to the Oroville Dam Spillway area.”
http://djkuba.tripod.com/ODamTrainTunelWreck.html
Thanks for the link!
At 1:15 it shows water coming over the left side of the weir.
Ping ! Vid showing water to left of weir, & the weir itself:
https://m.youtube.com/watch?v=mQkVr98xai0