Click through to see what the spillway looks like in action. I suspect this is what the edge of the world would have seemed like to them explorers back in the day. Except nobody believed the heretics yelling about how it was an inner edge, not an outie.
For your data mining pleasure, the Solano County Water Agency runs a live-on-the-internet graph of the current lake level compared to the height needed to spill. Even after a record wet winter last year, the lake was still 4-5’ shy of the rim. So sad that with the California trend to running out of water, these spillways will not likely be used again in a long time.