[meyer]

What you might be seeing are the sandbags strewn across the spillway near the top to direct the flow down one side only.

https://pixel-ca-dwr.photoshelter.com/galleries/C0000OxvlgXg3yfg/G00003YCcmDTx48Y/I0000WFhS62I.W9s/KG-oroville-spillway-repair-15562-03-02-2017-jpg

[Ray76]

Water on the left appears upstream from a weep hole and far from any upstream water.

Almost directly opposite, on the right, is an irregularity. If that is sandbags it's unusual placement, isolated as it is. Also, it appears to be part of a "herringbone crack"

These two are the areas I'm concerned about.