This wall has failed before. The 1st time they built it the engineer said it was ok for them to just put it on a gravel base, well it failed. So they poured a footing for it and rebuilt it again. About 6 months later this happened. All engineered, geogrid installed ect. They also tried pouring cement slurry into it to stabilize it, you can see that only put more pressure on it. Originaly they were supposed to tier this back in 4 tiers, but they decided to just do 3. If you ask me, the wall never should have been allowed to be built this high in the first place. Enjoy!