When a retaining wall starts to lean

So a retaining wall on a hillside that has lean water weeping out of the bottom after every rain. The soil isn't really what's pushing over that wall. It's the water in the soil that's pushing over that wall most of the time. Retaining walls, they're designed to retain the soil, but often drainage is overlooked. Or even if weep holes are installed, those weep holes get clogged and the wall ends up holding back basically like a swimming pool. So the cheap answer is drainage. And if you catch it in time, you can either flush out those weep holes, add some drainage, some pipes behind, maybe some tile drainage. But the expensive answer is replacing that wall. And once it's leaned too far or started to crack open too far, then you can't use any of the wall and you're going to have to replace it. So one of the cases that I've worked on was a 100-year-old concrete seawall needed to be reused. So it looked like it was in pretty good shape, but this developer was building houses on the water and every house of course wants a slip, right? And then within those slips and along the wall, they wanted to be able to moor some sailboats. So they needed to tell whether or not the wall was going to be able to hold the new loads, the new use. However, because it was older back then, we didn't know about drainage for retaining walls specifically, so there weren't weep holes. And because of that, water sat behind that wall, what was steel in it rusted, when the steel rusts, it expands, when it expands, it literally just pops the concrete off. And so unfortunately, a lot of that wall had to be replaced or restored, but if it had had weep holes, I'm telling that wall probably would have lasted another 100 years.