I guess any work in that vain would require draining most, if not all, of the water, that alone would take an absurd amount of time and can only happen as long as it doesn't threaten to cause floods downstream.
And most importantly, it would be a very visible sign that the dam is a failure.
3 choices
1. Pray it holds. it holds. Declare victorious engineering achievement.
2. Blow it up. Declare great visionary decision somehow and build monument for downstream party heroes.
3. It fails. Uprising against CCP and Winnie hanged from a lampost and corpse beaten like Mussolini.