It can't do it has a blocked end with a pipe that allows water to overflow out so is at a constant 5ft the same is at the repaired section that blocks the far end.
The water level was deeper than 5ft when we explored, we couldn't stand on the bottom, one of us tried and got wet, and he is 6ft tall.
I guess a dry suit would be a better option, and some arm bands for a bit of swimming
