With a signed easement in hand, my plumber went to work. This is the approximate path that the sewer line will take:
It's a bit of distance to cover, but it is all downhill and doesn't share any plumbing with the neighbor's house (other than the y-joint). First, he had to locate the side-sewer connection going out to the street.
From there, a trench was dug and a 6" line was installed along the edge of the neighbor's lot.
Here it is taking a corner:
..and another corner along the backside of the neighbor's property:
And finally, it needs to go uphill into my lot:
Next week should pick up again. We have picked out a new sub-contractor to finish the foundation work. My plumber will also be running the lines underneath the foundation and burying the pipe once it has been approved by an inspector. I can't wait for this phase of construction to finish.