Current height: 162.45
Static capacity (when the water isn't moving and applying additional pressure to the dam): 175m
Difference: 12.55m, or 41.17ft
Dam height: 181m (they say 185m in some of the documentation but the lowest point on the dam is 181m, and much of the surrounding area may be slightly lower than that, about 180.4m)
Difference: 18.55m, or 60.86ft
If we're getting around 10cm every hour, that's 2.5m every 24 hours, so to hit 175m it'll take five days, and to hit 181m it'll take another two and a half.
Since the last time we had this severe a flood produced damage to the dam's structure, caused infiltration of the concrete, and made the deflection in the middle of the dam worse, I would anticipate that we won't need the full timeline. We just need water.