California DWR videos of Emergency Spillway Operation

California DWR Videos ^ | February 13, 2017 | California DWR

[CedarDave]

Five separate videos shot by CA DWR as the emergency spillway becomes active (overtops) at 8:a.m. on Saturday morning through Sunday p.m., and work on Monday to drop rock to fill the erosion channels. Most videos are from drones and the relationship of the spillway to the main spillway on the right (direction southeast) and the parking lot on the left (direction northwest) can be easily seen.

It appears that the fear of failure of the emergency spillway was two-fold with erosion moving back up to the narrow base of the spillway and possibly undercutting the concrete spillway, and the possibility of a new lake outlet at left end of the spillway due to flooding of the parking lot and subsequent scouring back to the lake.

[XEHRpa]

I found this extended interview (posted by some freeper earlier today) to be a most excellent discussion of the subject:

https://www.youtube.com/watch?v=rl7Sm15unPQ&feature=youtu.be

[WMarshal]

By no means am u saying that Californians should suffer by being under the rule of the Moonbeams. That being said, the Moonbeam government has got to go.

[DoughtyOne]

Thanks for your comments. I’ll leave that level of observation and explanation to you.

Sounds reasoned to me.

[blueplum]

The third video, at abt the 1 minute mark, shows the largest erosion hole on the emergency (auxillary) spillway (is that end part called a “toe?” ) that was cutting right back to the concrete wall. If that whole area had been concreted the same day they had the boom truck out there shooting quickcrete into the area to the far right next to the dam tower, maybe it might have held?