Flood Wall Water Stops

[mackerel]

I am currently working on a project infilling existing levee doors with concrete on existing flood walls. I was planning on specifying a hydrophilic water stop at the existing to new joint. The owner is concerned that the hydrophillic water stop will not last/stand the test of time since the flood walls are designed for a 100 year storm.

Does anyone have experience/suggestion for this? Alternate water stops that may work better,or do the Hydrophilic stops acceptable?

Thanks,

 

[JedClampett]

I wouldn't use hydrophilic. They're fine in limited applications, but I much prefer (and those in the water/wastewater industry will mostly agree) a barrier type waterstop made of PVC.
Several reasons; they need to get wet to work; they take time to activate; their swelling forces can spall concrete; I don't trust them for numerous wet/dry cycles. As far as the 100 year storm, it's still just a wall of water. The waterstop doesn't know anything except there's water on one side and dry on the other.