Actually, we do. It's not that frequent, but the march of time has seen big changes in water quality, waste water treatment and waste water discharge strategies. Housing densities are increasing fast so bigger pipes are required (more bandwidth?). Dumping waste straight into the sea is no longer acceptable and mixing storm water and waste water is slowly being phased out and separate systems are now utilized. It's not exactly the same, but the dumb pipes that come and go from my suburb are slowly being smartened up. Auckland, New Zealand.