Or retire the dam. I think the rock has been an issue since day one.
From the article:A second structure, the Badush dam, was started 20km downstream, to prevent a catastrophe in the event of the Mosul dam’s failure. But work on Badush halted in the 1990s because of the pressure of sanctions, leaving it only 40% complete.
750MW, though. That's about 7% of their electrical grid capacity, which is already 40% too low.
That's one of those politically impossible situations. Either cause a small disaster now (less access to energy) or let a big disaster happen later. I suppose that explains why they used to do (and needed to continue) so much grouting. Anything to keep the energy flowing.
It's a pretty clear-cut problem, though. Replace the machines and teams, finish the replacement dam ASAP, retire this dam. The problem is more about policitical will - like most of them.
I assume the same way they secured it last time, stationing coalition forces there. Not that that's going to happen.