[EarthResearcher333]

Of course we all agree that this work being shown here is just temporary stop gap to mitigate (but not stop) erosion damaging to quickly when they have to turn the spillway back on. There may be a disconnect... my additional comments pertain to a foundation threat upstream.

The new images (not this one) reveal an undrained -new layer- source to Stagnation Pressure. This risk could bust an area of the Upper Spillway, including near the gates.

[KC Burke]

If I had to make a snap guess, I bet they only run this thing in the 20k to 40k range and with 10-14k on the power plant, they try and use that to manage the lake for the next five months.

When they feel they can shut this off, they will have staged a complete replacement and hit it in force.