Fun fact about dams: while they may be "in need of repair", they are rarely "repairable", due to not having a technology that repairs decaying concrete underwater. Or above water.
The only way to do it is to build a second dam and then remove the first one. It's fucking EXPENSIVE.
But it's also necessary.
In most cases, the dams aren't even providing any value and can simply be demolished, providing the downstream populations aren't at risk of flooding. Which often they are.
I didn't know that. I assumed that most were hydro-electric.
Nope. I think here are about 2000 hydroelectric dams in the US, out of about 75,000. Most of them are about "water control", ie. people being monkeys about something.