This Bee aerial video of the work on the Feather River to try to cope with the problems at Oroville Dam is an amazing illustration of the scale of human intervention in rivers:

Oroville, screen grab from Sacramento/Fresno Bee

Click through for the full video, no one screen grab can do it justice. They’ve completely shut down the spillway so they can get in and clear the debris plug that is preventing the power plant from operating. This is primarily about the use of the power plant to remove water from the reservoir, not the power.