Since I was away for a while the reports had piled in for all the construction. I noticed that the city was indeed looking much better than before. Many of the holes in the roads were fixed and testing of the new drainage system was a huge success. Seems like its smooth sailing from here.
The sewage worked in the way an ancient civilization from my old life worked. Pipes would drain out the water from the many places and run through the walls down through a drainage system rather than just into a dug out lake. It becomes complicated from here on out and confuses me too. Which is why I sent this idea for testing.