I have a concrete culvert under my driveway. The first pipe section on the input side has dropped about 2 inches causing water to back up into my yard.
Digging up the pipe section would be expensive.
Considering pouring a soupy concrete mix into the pipe to effectively level the dropped pipe section. The pipe diameter is too small to access the total area needing leveling which is why using a watery concrete mix could fill the place I can't reach. Will this work? Other ideas?
Best Answer
As I mentioned in a comment, a lowered pipe shouldn't cause a backup. The high point in the system is where the water level stabilizes.
That said, I see no reason why a concrete enhancement would cause problems on the intake side, assuming adequate flow volume remains. You wouldn't want to reduce volume on the outflow side as this could result in foreign object obstructions.
Also, you'd use a standard concrete mix, and not an overwatered mix, which would be weaker and more prone to disintegration. It's not difficult to level concrete with a little agitation.