Watch Your Step

You don't have the track skill, but a brief roll on "The-GM-doesn't-want-to-bother-looking-up-an-untrained-survival-check-rule" table assures you that there was one kobold who came back and forth a few times to continue looting the body that was once here. (One of the first worker's corpses that you found.) Other than that - nothing. No sign of Fast Eddie. How odd. (Make a Knowledge Arcana check DC 20)

"Once into the main east/west pipe, Kaspar will take a quick scan of the area and then of the catwalk across the way. " (It looks like you weren't Searching in the N/S feeder pipe, just taking 10 on Spot and Survival, so nothing else shows up in the N/S tunnel. It also looks like you are taking 20 on your Search check in the E/W tunnel, something that you did not do in this part of the tunnel last time. If I am misreading this let me know and roll up some checks, Listen, Spot, Search, etc.)

Incidentally the data on the area can be found at some old posts here and here.

Your are currently near the east end of the east-west pipe. The pipe has a five-foot wide catwalk on its north side and its south side. You have been here before, on the catwalk you are on now, the catwalk on the south side. (The kobold had rigged a trap on it that you disabled.) There is a set of angled feeder pipes in the ceiling to the west that begin this pipe's "water" flow from west to east, and a thick grate at the east end of this pipe that allows the water to flow eastward out of the story into the swamps outside the city.

What taking 20 on your Search check allows you to find are some submerged steps, on this side and on the other side. This will enable you to avoid going hip-deep, as these steps are for maintenance. (Anyway the flow level has lessened since a morning rain so it is actually at a lower water level than when you where last here hours ago.)

A paintbrush map is on its way via email. If you think the description above isn't clear enough please feel free to post it.