This is the old spillway (17 ft high). They'll probably take it out today. Unfortunately, I cannot be there to watch and take photographs. Wife & dog obligations in GA.
The last section of pipe and the spillway were delivered. These should be installed this week if the weather cooperates. They found good clay for the core footing about 10 to 12 feet below the footing of the spillway location so the core was dug out and rebuilt from there up.
The pipe and spillway were installed over the last three days. Here's a series of photos of the action. Lots of mud involved. In the first photo, the middle and back pipe sections were bolted together in place and the front 30 foot pipe section to the spillway riser is shown.