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That drainage pipe issue took 11 days to crack in Phoenix
We had a slab pour scheduled for a warehouse in Phoenix and the storm drain pipe kept backing up. My crew thought it was a clog, but after 3 days of snaking we found a collapsed bell joint 40 feet in. Had to bring in a mini excavator, cut the slab, and replace the section. Whole thing set us back 11 days and about $4,800 over the bid. Any of you run into hidden pipe failures that weren't visible on the pre-pour camera inspection?
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patricialee7d ago
The camera inspection is exactly what missed it though. A collapsed bell joint 40 feet in should show up on camera unless the pipe was still holding water or the lens was pointed wrong. What I have seen happen more is the camera guy running the line from the wrong direction and quitting early, or the pipe has a belly that holds a few inches of water so you can't see the crack below the water line. The pre-pour check only proves the pipe was open that day, not that the ground under it is stable. In Phoenix you also get that soil movement from the dry and wet swings, so a joint that looked fine can shift after the camera runs. That is why I always want the camera run both ways and a locator put on it so you know the depth and where it actually sits.
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