I am considering bulkheading a submerged pipe (about 5' below low tide) and pumping out the water to allow for inspection. The pipe (42" RCP) passes under a major building (don't ask why - long history). As engineers we try to think of the worst and I am imagining that there are open joints in the pipe and some fines from the soilmay wash into the pipe once it is empty. This would in turn undermine the building slab.
Not a realistic scenario? Any thoughts?
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