Looking for how my sewer lines run?

Underground most likely! Contact you local water and sewer authority .

I agree... I'm guessing underground as well... Most of them tend to be.

Looking for how my sewer lines run?
City sewer or septic tank? For a city sewer contact the building Department and ask if they have a record of the raiser on your street. If you're on a septic system I'll need more information. Let me know, Tom