excellent pic here
also,
http://www.sfgate.com/news/article/Courting-disaster-at-Oroville-Dam-key-10932701.php#photo-12372761
Look at the massive water flow of the Feather River, Sacramento River and Lake Oroville 3:02
http://www.sacbee.com/news/weather/article132587659.html
This image seems to be a copy of what a person posted on imgur.com
The image was taken Feb 14, 2017 AM (you can see the shadow angle of the heavy lift helicopter in the parking lot).
So this image doesn’t reveal what they were working on in the upper main spillway last night with the concrete pumping truck.
Perhaps it may be talked about in the press update today.
—— info on original source
Oroville, CA Dam/Spillway - February 14, 2017
4,000 ft. altitude, Cessna 172, Nikon D810, Zeiss 85mm 1.4 Planar lens.
Aerial photo album http://imgur.com/a/OCB2H.