Well, great question!
No, they did not replace with galvanized. Actually, the plan goes against a lot of what engineers say "won't work", but has been doing just fine since 92.
This 9 acre lake receives a year round stream flow of about 350 gallons/min, and any and all runoff from the surrounding acres of over 100. This is regulated by an emergency earthen spillway (Helene), but for the most part, has (1) 10in PVC riser pipe (no trash rack) that lies on the edge of the lake. This riser drops approximately 8ft, then moves horizontal underneath a red clay/ gravel road, and then empties into another 2 acre pond that simply empties into the woods. It's made its own path of course.
The dam is approx 75 yards long, and appears to be a true 3:1 slope on both sides.
